diff --git a/compiler/testData/cli/jvm/explicitlyDisabledSamConversions.args b/compiler/testData/cli/jvm/explicitlyDisabledSamConversions.args
index 247291cbc00..1a96173d6ff 100644
--- a/compiler/testData/cli/jvm/explicitlyDisabledSamConversions.args
+++ b/compiler/testData/cli/jvm/explicitlyDisabledSamConversions.args
@@ -1,5 +1,4 @@
 $TESTDATA_DIR$/newInferenceImpliesSamConversions.kt
 -d
 $TEMP_DIR$
--XXLanguage\:+NewInference
 -XXLanguage\:-SamConversionForKotlinFunctions
\ No newline at end of file
diff --git a/compiler/testData/cli/jvm/explicitlyDisabledSamConversions.out b/compiler/testData/cli/jvm/explicitlyDisabledSamConversions.out
index 24dac9cd6db..54684366229 100644
--- a/compiler/testData/cli/jvm/explicitlyDisabledSamConversions.out
+++ b/compiler/testData/cli/jvm/explicitlyDisabledSamConversions.out
@@ -1,7 +1,6 @@
 warning: ATTENTION!
 This build uses unsafe internal compiler arguments:
 
--XXLanguage:+NewInference
 -XXLanguage:-SamConversionForKotlinFunctions
 
 This mode is not recommended for production use,
diff --git a/compiler/testData/cli/jvm/functionReferenceWithDefaultValuesFeatureIsEnabledWithXXNewInference.args b/compiler/testData/cli/jvm/functionReferenceWithDefaultValuesFeatureIsEnabledWithXXNewInference.args
index 4a72393beeb..cb265676a3f 100644
--- a/compiler/testData/cli/jvm/functionReferenceWithDefaultValuesFeatureIsEnabledWithXXNewInference.args
+++ b/compiler/testData/cli/jvm/functionReferenceWithDefaultValuesFeatureIsEnabledWithXXNewInference.args
@@ -1,4 +1,3 @@
 $TESTDATA_DIR$/functionReferenceWithDefaultValuesFeatureIsEnabledWithNewInference.kt
 -d
 $TEMP_DIR$
--XXLanguage\:+NewInference
diff --git a/compiler/testData/cli/jvm/functionReferenceWithDefaultValuesFeatureIsEnabledWithXXNewInference.out b/compiler/testData/cli/jvm/functionReferenceWithDefaultValuesFeatureIsEnabledWithXXNewInference.out
index b44197449b5..d86bac9de59 100644
--- a/compiler/testData/cli/jvm/functionReferenceWithDefaultValuesFeatureIsEnabledWithXXNewInference.out
+++ b/compiler/testData/cli/jvm/functionReferenceWithDefaultValuesFeatureIsEnabledWithXXNewInference.out
@@ -1,10 +1 @@
-warning: ATTENTION!
-This build uses unsafe internal compiler arguments:
-
--XXLanguage:+NewInference
-
-This mode is not recommended for production use,
-as no stability/compatibility guarantees are given on
-compiler or generated code. Use it at your own risk!
-
 OK
diff --git a/compiler/testData/cli/jvm/newInferenceImpliesProgressiveModeForNI.args b/compiler/testData/cli/jvm/newInferenceImpliesProgressiveModeForNI.args
index 8aa4650126f..cbe67944f06 100644
--- a/compiler/testData/cli/jvm/newInferenceImpliesProgressiveModeForNI.args
+++ b/compiler/testData/cli/jvm/newInferenceImpliesProgressiveModeForNI.args
@@ -1,4 +1,3 @@
 $TESTDATA_DIR$/newInferenceImpliesProgressiveModeForNI.kt
 -d
 $TEMP_DIR$
--XXLanguage\:+NewInference
\ No newline at end of file
diff --git a/compiler/testData/cli/jvm/newInferenceImpliesProgressiveModeForNI.out b/compiler/testData/cli/jvm/newInferenceImpliesProgressiveModeForNI.out
index d656becb3ae..08da22c81b8 100644
--- a/compiler/testData/cli/jvm/newInferenceImpliesProgressiveModeForNI.out
+++ b/compiler/testData/cli/jvm/newInferenceImpliesProgressiveModeForNI.out
@@ -1,16 +1,11 @@
-warning: ATTENTION!
-This build uses unsafe internal compiler arguments:
-
--XXLanguage:+NewInference
-
-This mode is not recommended for production use,
-as no stability/compatibility guarantees are given on
-compiler or generated code. Use it at your own risk!
-
 compiler/testData/cli/jvm/newInferenceImpliesProgressiveModeForNI.kt:6:13: warning: parameter 'x' is never used
     fun bar(x: Int = 0): String = ""
             ^
 compiler/testData/cli/jvm/newInferenceImpliesProgressiveModeForNI.kt:9:13: warning: variable 'r1' is never used
         val r1 = foo(::bar)
             ^
+compiler/testData/cli/jvm/newInferenceImpliesProgressiveModeForNI.kt:9:22: warning: candidate resolution will be changed soon, please use fully qualified name to invoke the following closer candidate explicitly '
+public final fun bar(x: Int = ...): String defined in Scope'
+        val r1 = foo(::bar)
+                     ^
 OK
diff --git a/compiler/testData/cli/jvm/newInferenceImpliesSamConversions.args b/compiler/testData/cli/jvm/newInferenceImpliesSamConversions.args
index 1bfbf9ba61f..e7e7b204d28 100644
--- a/compiler/testData/cli/jvm/newInferenceImpliesSamConversions.args
+++ b/compiler/testData/cli/jvm/newInferenceImpliesSamConversions.args
@@ -1,4 +1,3 @@
 $TESTDATA_DIR$/newInferenceImpliesSamConversions.kt
 -d
 $TEMP_DIR$
--XXLanguage\:+NewInference
\ No newline at end of file
diff --git a/compiler/testData/cli/jvm/newInferenceImpliesSamConversions.out b/compiler/testData/cli/jvm/newInferenceImpliesSamConversions.out
index ab51f06e1c5..45e1b102f14 100644
--- a/compiler/testData/cli/jvm/newInferenceImpliesSamConversions.out
+++ b/compiler/testData/cli/jvm/newInferenceImpliesSamConversions.out
@@ -1,12 +1,3 @@
-warning: ATTENTION!
-This build uses unsafe internal compiler arguments:
-
--XXLanguage:+NewInference
-
-This mode is not recommended for production use,
-as no stability/compatibility guarantees are given on
-compiler or generated code. Use it at your own risk!
-
 compiler/testData/cli/jvm/newInferenceImpliesSamConversions.kt:1:9: warning: parameter 'r' is never used
 fun foo(r: Runnable) {}
         ^
diff --git a/compiler/testData/cli/jvm/standaloneSamConversionsAreEnabledWithNewInferenceInternalFlag.args b/compiler/testData/cli/jvm/standaloneSamConversionsAreEnabledWithNewInferenceInternalFlag.args
index 53fc049dbaf..7fd38319bd0 100644
--- a/compiler/testData/cli/jvm/standaloneSamConversionsAreEnabledWithNewInferenceInternalFlag.args
+++ b/compiler/testData/cli/jvm/standaloneSamConversionsAreEnabledWithNewInferenceInternalFlag.args
@@ -1,4 +1,3 @@
 $TESTDATA_DIR$/standaloneSamConversionsAreEnabledWithNewInference.kt
 -d
 $TEMP_DIR$
--XXLanguage\:+NewInference
diff --git a/compiler/testData/cli/jvm/standaloneSamConversionsAreEnabledWithNewInferenceInternalFlag.out b/compiler/testData/cli/jvm/standaloneSamConversionsAreEnabledWithNewInferenceInternalFlag.out
index b44197449b5..d86bac9de59 100644
--- a/compiler/testData/cli/jvm/standaloneSamConversionsAreEnabledWithNewInferenceInternalFlag.out
+++ b/compiler/testData/cli/jvm/standaloneSamConversionsAreEnabledWithNewInferenceInternalFlag.out
@@ -1,10 +1 @@
-warning: ATTENTION!
-This build uses unsafe internal compiler arguments:
-
--XXLanguage:+NewInference
-
-This mode is not recommended for production use,
-as no stability/compatibility guarantees are given on
-compiler or generated code. Use it at your own risk!
-
 OK
diff --git a/compiler/testData/diagnostics/nonStableParameterNames/test.kt b/compiler/testData/diagnostics/nonStableParameterNames/test.kt
index 7a4bbbe157c..512a1da0763 100644
--- a/compiler/testData/diagnostics/nonStableParameterNames/test.kt
+++ b/compiler/testData/diagnostics/nonStableParameterNames/test.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // MODULE: m1-common
 // FILE: test.kt
 
diff --git a/compiler/testData/diagnostics/tests/callableReference/constraintFromLHSWithCorrectDirectionError.fir.kt b/compiler/testData/diagnostics/tests/callableReference/constraintFromLHSWithCorrectDirectionError.fir.kt
index 1493ca6a61f..ff666a0dc55 100644
--- a/compiler/testData/diagnostics/tests/callableReference/constraintFromLHSWithCorrectDirectionError.fir.kt
+++ b/compiler/testData/diagnostics/tests/callableReference/constraintFromLHSWithCorrectDirectionError.fir.kt
@@ -1,5 +1,4 @@
 // SKIP_TXT
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 package test
diff --git a/compiler/testData/diagnostics/tests/callableReference/constraintFromLHSWithCorrectDirectionError.kt b/compiler/testData/diagnostics/tests/callableReference/constraintFromLHSWithCorrectDirectionError.kt
index f3966713ecb..5816ce4e59c 100644
--- a/compiler/testData/diagnostics/tests/callableReference/constraintFromLHSWithCorrectDirectionError.kt
+++ b/compiler/testData/diagnostics/tests/callableReference/constraintFromLHSWithCorrectDirectionError.kt
@@ -1,5 +1,4 @@
 // SKIP_TXT
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 package test
diff --git a/compiler/testData/diagnostics/tests/callableReference/correctInfoAfterArrayLikeCall.fir.kt b/compiler/testData/diagnostics/tests/callableReference/correctInfoAfterArrayLikeCall.fir.kt
index 7be47b6b770..34f2458fee0 100644
--- a/compiler/testData/diagnostics/tests/callableReference/correctInfoAfterArrayLikeCall.fir.kt
+++ b/compiler/testData/diagnostics/tests/callableReference/correctInfoAfterArrayLikeCall.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 /*
  * KOTLIN DIAGNOSTICS SPEC TEST (POSITIVE)
diff --git a/compiler/testData/diagnostics/tests/callableReference/correctInfoAfterArrayLikeCall.kt b/compiler/testData/diagnostics/tests/callableReference/correctInfoAfterArrayLikeCall.kt
index 1db49d54e89..dbba38f1b0d 100644
--- a/compiler/testData/diagnostics/tests/callableReference/correctInfoAfterArrayLikeCall.kt
+++ b/compiler/testData/diagnostics/tests/callableReference/correctInfoAfterArrayLikeCall.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 /*
  * KOTLIN DIAGNOSTICS SPEC TEST (POSITIVE)
diff --git a/compiler/testData/diagnostics/tests/callableReference/functionReferenceWithDefaultValueAsOtherFunctionType_enabled.kt b/compiler/testData/diagnostics/tests/callableReference/functionReferenceWithDefaultValueAsOtherFunctionType_enabled.kt
index dfdffd4f930..4cb743df6cd 100644
--- a/compiler/testData/diagnostics/tests/callableReference/functionReferenceWithDefaultValueAsOtherFunctionType_enabled.kt
+++ b/compiler/testData/diagnostics/tests/callableReference/functionReferenceWithDefaultValueAsOtherFunctionType_enabled.kt
@@ -1,5 +1,5 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference +FunctionReferenceWithDefaultValueAsOtherType
+// !LANGUAGE: +FunctionReferenceWithDefaultValueAsOtherType
 
 fun foo(a: String, b: Int = 5): String {
     return a + b
diff --git a/compiler/testData/diagnostics/tests/callableReference/generic/dependOnArgumentType.fir.kt b/compiler/testData/diagnostics/tests/callableReference/generic/dependOnArgumentType.fir.kt
index 941d327880d..81878fbe858 100644
--- a/compiler/testData/diagnostics/tests/callableReference/generic/dependOnArgumentType.fir.kt
+++ b/compiler/testData/diagnostics/tests/callableReference/generic/dependOnArgumentType.fir.kt
@@ -1,4 +1,4 @@
-// !LANGUAGE: +SamConversionPerArgument +NewInference +ProhibitVarargAsArrayAfterSamArgument
+// !LANGUAGE: +SamConversionPerArgument +ProhibitVarargAsArrayAfterSamArgument
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 // FILE: A.java
diff --git a/compiler/testData/diagnostics/tests/callableReference/generic/dependOnArgumentType.kt b/compiler/testData/diagnostics/tests/callableReference/generic/dependOnArgumentType.kt
index 961da9621d2..3568cb7b050 100644
--- a/compiler/testData/diagnostics/tests/callableReference/generic/dependOnArgumentType.kt
+++ b/compiler/testData/diagnostics/tests/callableReference/generic/dependOnArgumentType.kt
@@ -1,4 +1,4 @@
-// !LANGUAGE: +SamConversionPerArgument +NewInference +ProhibitVarargAsArrayAfterSamArgument
+// !LANGUAGE: +SamConversionPerArgument +ProhibitVarargAsArrayAfterSamArgument
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 // FILE: A.java
diff --git a/compiler/testData/diagnostics/tests/callableReference/generic/kt35896.kt b/compiler/testData/diagnostics/tests/callableReference/generic/kt35896.kt
index 3cec1d7a63e..0756576a443 100644
--- a/compiler/testData/diagnostics/tests/callableReference/generic/kt35896.kt
+++ b/compiler/testData/diagnostics/tests/callableReference/generic/kt35896.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // ISSUE: KT-35896
 
diff --git a/compiler/testData/diagnostics/tests/callableReference/genericCallWithReferenceAgainstVararg.fir.kt b/compiler/testData/diagnostics/tests/callableReference/genericCallWithReferenceAgainstVararg.fir.kt
index e31a75d69cf..71ad8ffd707 100644
--- a/compiler/testData/diagnostics/tests/callableReference/genericCallWithReferenceAgainstVararg.fir.kt
+++ b/compiler/testData/diagnostics/tests/callableReference/genericCallWithReferenceAgainstVararg.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 fun foo(vararg ints: Int) {}
diff --git a/compiler/testData/diagnostics/tests/callableReference/genericCallWithReferenceAgainstVararg.kt b/compiler/testData/diagnostics/tests/callableReference/genericCallWithReferenceAgainstVararg.kt
index 9f8f53d4851..f8232894e56 100644
--- a/compiler/testData/diagnostics/tests/callableReference/genericCallWithReferenceAgainstVararg.kt
+++ b/compiler/testData/diagnostics/tests/callableReference/genericCallWithReferenceAgainstVararg.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 fun foo(vararg ints: Int) {}
diff --git a/compiler/testData/diagnostics/tests/callableReference/genericCallWithReferenceAgainstVarargAndKFunction.kt b/compiler/testData/diagnostics/tests/callableReference/genericCallWithReferenceAgainstVarargAndKFunction.kt
index 61459c671ad..6dbcb294ba1 100644
--- a/compiler/testData/diagnostics/tests/callableReference/genericCallWithReferenceAgainstVarargAndKFunction.kt
+++ b/compiler/testData/diagnostics/tests/callableReference/genericCallWithReferenceAgainstVarargAndKFunction.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 fun <A1> fun2(f: kotlin.reflect.KFunction1<A1, Unit>, a: A1) {
diff --git a/compiler/testData/diagnostics/tests/callableReference/kt31981.fir.kt b/compiler/testData/diagnostics/tests/callableReference/kt31981.fir.kt
index 7c4da22aba5..370ecb3b66e 100644
--- a/compiler/testData/diagnostics/tests/callableReference/kt31981.fir.kt
+++ b/compiler/testData/diagnostics/tests/callableReference/kt31981.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 import kotlin.reflect.KProperty1
diff --git a/compiler/testData/diagnostics/tests/callableReference/kt31981.kt b/compiler/testData/diagnostics/tests/callableReference/kt31981.kt
index 2ba8d91d33b..cc218173ad7 100644
--- a/compiler/testData/diagnostics/tests/callableReference/kt31981.kt
+++ b/compiler/testData/diagnostics/tests/callableReference/kt31981.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 import kotlin.reflect.KProperty1
diff --git a/compiler/testData/diagnostics/tests/callableReference/kt32256.kt b/compiler/testData/diagnostics/tests/callableReference/kt32256.kt
index b54cdbaa996..343c40ff73d 100644
--- a/compiler/testData/diagnostics/tests/callableReference/kt32256.kt
+++ b/compiler/testData/diagnostics/tests/callableReference/kt32256.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // Issue: KT-32256
 
diff --git a/compiler/testData/diagnostics/tests/callableReference/kt32267.kt b/compiler/testData/diagnostics/tests/callableReference/kt32267.kt
index aad43e06536..214e1daca44 100644
--- a/compiler/testData/diagnostics/tests/callableReference/kt32267.kt
+++ b/compiler/testData/diagnostics/tests/callableReference/kt32267.kt
@@ -1,7 +1,6 @@
 // FIR_IDENTICAL
 // SKIP_TXT
 // !DIAGNOSTICS: -UNUSED_PARAMETER
-// !LANGUAGE: +NewInference
 
 fun main() {
     Configuration().commands {
diff --git a/compiler/testData/diagnostics/tests/callableReference/kt35959.kt b/compiler/testData/diagnostics/tests/callableReference/kt35959.kt
index 1be035af1f3..c720472f6f6 100644
--- a/compiler/testData/diagnostics/tests/callableReference/kt35959.kt
+++ b/compiler/testData/diagnostics/tests/callableReference/kt35959.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // ISSUE: KT-35959
 
diff --git a/compiler/testData/diagnostics/tests/callableReference/lambdaResult.kt b/compiler/testData/diagnostics/tests/callableReference/lambdaResult.kt
index 4b9b62cc8e4..8efbc7c3892 100644
--- a/compiler/testData/diagnostics/tests/callableReference/lambdaResult.kt
+++ b/compiler/testData/diagnostics/tests/callableReference/lambdaResult.kt
@@ -1,7 +1,6 @@
 // FIR_IDENTICAL
 // SKIP_TXT
 // !DIAGNOSTICS: -UNUSED_PARAMETER
-// !LANGUAGE: +NewInference
 
 interface Inv<T>
 
diff --git a/compiler/testData/diagnostics/tests/callableReference/noAmbiguityWhenAllReferencesAreInapplicable.kt b/compiler/testData/diagnostics/tests/callableReference/noAmbiguityWhenAllReferencesAreInapplicable.kt
index d8174d599da..f81bab2db8d 100644
--- a/compiler/testData/diagnostics/tests/callableReference/noAmbiguityWhenAllReferencesAreInapplicable.kt
+++ b/compiler/testData/diagnostics/tests/callableReference/noAmbiguityWhenAllReferencesAreInapplicable.kt
@@ -1,6 +1,5 @@
 // FIR_IDENTICAL
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE
-// !LANGUAGE: +NewInference
 
 import kotlin.reflect.KFunction1
 import kotlin.reflect.KFunction2
diff --git a/compiler/testData/diagnostics/tests/callableReference/noExceptionOnRedCodeWithArrayLikeCall.fir.kt b/compiler/testData/diagnostics/tests/callableReference/noExceptionOnRedCodeWithArrayLikeCall.fir.kt
index 5ca4378d724..110aabab7a8 100644
--- a/compiler/testData/diagnostics/tests/callableReference/noExceptionOnRedCodeWithArrayLikeCall.fir.kt
+++ b/compiler/testData/diagnostics/tests/callableReference/noExceptionOnRedCodeWithArrayLikeCall.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 
 class DTO {
     val q: Int = 0
diff --git a/compiler/testData/diagnostics/tests/callableReference/noExceptionOnRedCodeWithArrayLikeCall.kt b/compiler/testData/diagnostics/tests/callableReference/noExceptionOnRedCodeWithArrayLikeCall.kt
index 941ac04e3c4..4fa5004ccab 100644
--- a/compiler/testData/diagnostics/tests/callableReference/noExceptionOnRedCodeWithArrayLikeCall.kt
+++ b/compiler/testData/diagnostics/tests/callableReference/noExceptionOnRedCodeWithArrayLikeCall.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 
 class DTO {
     val q: Int = 0
diff --git a/compiler/testData/diagnostics/tests/callableReference/property/extensionsSameName.kt b/compiler/testData/diagnostics/tests/callableReference/property/extensionsSameName.kt
index ccbbf5c0d92..8c8087c2a86 100644
--- a/compiler/testData/diagnostics/tests/callableReference/property/extensionsSameName.kt
+++ b/compiler/testData/diagnostics/tests/callableReference/property/extensionsSameName.kt
@@ -1,6 +1,5 @@
 // FIR_IDENTICAL
 // SKIP_TXT
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 fun check1(p: kotlin.reflect.KProperty1<*, *>) {}
diff --git a/compiler/testData/diagnostics/tests/callableReference/resolve/ambiguityWhenNoApplicableCallableReferenceCandidate.fir.kt b/compiler/testData/diagnostics/tests/callableReference/resolve/ambiguityWhenNoApplicableCallableReferenceCandidate.fir.kt
index 7e97f5c163e..91bebd474e5 100644
--- a/compiler/testData/diagnostics/tests/callableReference/resolve/ambiguityWhenNoApplicableCallableReferenceCandidate.fir.kt
+++ b/compiler/testData/diagnostics/tests/callableReference/resolve/ambiguityWhenNoApplicableCallableReferenceCandidate.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 fun foo(x: Int) {}
diff --git a/compiler/testData/diagnostics/tests/callableReference/resolve/ambiguityWhenNoApplicableCallableReferenceCandidate.kt b/compiler/testData/diagnostics/tests/callableReference/resolve/ambiguityWhenNoApplicableCallableReferenceCandidate.kt
index 5f8196ddb99..dab42d76e5c 100644
--- a/compiler/testData/diagnostics/tests/callableReference/resolve/ambiguityWhenNoApplicableCallableReferenceCandidate.kt
+++ b/compiler/testData/diagnostics/tests/callableReference/resolve/ambiguityWhenNoApplicableCallableReferenceCandidate.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 fun foo(x: Int) {}
diff --git a/compiler/testData/diagnostics/tests/callableReference/resolve/ambiguityWithBoundExtensionReceiver.kt b/compiler/testData/diagnostics/tests/callableReference/resolve/ambiguityWithBoundExtensionReceiver.kt
index 43b964c33f7..bfe55bc4e9a 100644
--- a/compiler/testData/diagnostics/tests/callableReference/resolve/ambiguityWithBoundExtensionReceiver.kt
+++ b/compiler/testData/diagnostics/tests/callableReference/resolve/ambiguityWithBoundExtensionReceiver.kt
@@ -1,6 +1,5 @@
 // FIR_IDENTICAL
 // SKIP_TXT
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // !CHECK_TYPE
 
diff --git a/compiler/testData/diagnostics/tests/callableReference/resolve/applicableCallableReferenceFromDistantScope.kt b/compiler/testData/diagnostics/tests/callableReference/resolve/applicableCallableReferenceFromDistantScope.kt
index 35214db5dc1..4f6c7cef838 100644
--- a/compiler/testData/diagnostics/tests/callableReference/resolve/applicableCallableReferenceFromDistantScope.kt
+++ b/compiler/testData/diagnostics/tests/callableReference/resolve/applicableCallableReferenceFromDistantScope.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE
 
 fun foo(s: String) {}
diff --git a/compiler/testData/diagnostics/tests/callableReference/resolve/callableReferenceToVarargWithOverload.kt b/compiler/testData/diagnostics/tests/callableReference/resolve/callableReferenceToVarargWithOverload.kt
index 2e760830626..7d6a77eb52e 100644
--- a/compiler/testData/diagnostics/tests/callableReference/resolve/callableReferenceToVarargWithOverload.kt
+++ b/compiler/testData/diagnostics/tests/callableReference/resolve/callableReferenceToVarargWithOverload.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 import kotlin.reflect.KFunction2
diff --git a/compiler/testData/diagnostics/tests/callableReference/resolve/chooseCallableReferenceDependingOnInferredReceiver.fir.kt b/compiler/testData/diagnostics/tests/callableReference/resolve/chooseCallableReferenceDependingOnInferredReceiver.fir.kt
index 1dfdb2ee6e2..59021568d8c 100644
--- a/compiler/testData/diagnostics/tests/callableReference/resolve/chooseCallableReferenceDependingOnInferredReceiver.fir.kt
+++ b/compiler/testData/diagnostics/tests/callableReference/resolve/chooseCallableReferenceDependingOnInferredReceiver.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_EXPRESSION
 
 class A {
diff --git a/compiler/testData/diagnostics/tests/callableReference/resolve/chooseCallableReferenceDependingOnInferredReceiver.kt b/compiler/testData/diagnostics/tests/callableReference/resolve/chooseCallableReferenceDependingOnInferredReceiver.kt
index 1c47e197547..1ee368d68ca 100644
--- a/compiler/testData/diagnostics/tests/callableReference/resolve/chooseCallableReferenceDependingOnInferredReceiver.kt
+++ b/compiler/testData/diagnostics/tests/callableReference/resolve/chooseCallableReferenceDependingOnInferredReceiver.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_EXPRESSION
 
 class A {
diff --git a/compiler/testData/diagnostics/tests/callableReference/resolve/chooseOuterCallBySingleCallableReference.kt b/compiler/testData/diagnostics/tests/callableReference/resolve/chooseOuterCallBySingleCallableReference.kt
index 221ee54d77c..b37391556d8 100644
--- a/compiler/testData/diagnostics/tests/callableReference/resolve/chooseOuterCallBySingleCallableReference.kt
+++ b/compiler/testData/diagnostics/tests/callableReference/resolve/chooseOuterCallBySingleCallableReference.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 import kotlin.reflect.KProperty1
diff --git a/compiler/testData/diagnostics/tests/callableReference/resolve/commonSupertypeFromReturnTypesOfCallableReference.fir.kt b/compiler/testData/diagnostics/tests/callableReference/resolve/commonSupertypeFromReturnTypesOfCallableReference.fir.kt
index 2f5cc8259c5..4a19cdaa276 100644
--- a/compiler/testData/diagnostics/tests/callableReference/resolve/commonSupertypeFromReturnTypesOfCallableReference.fir.kt
+++ b/compiler/testData/diagnostics/tests/callableReference/resolve/commonSupertypeFromReturnTypesOfCallableReference.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_EXPRESSION
 
 interface Parent
diff --git a/compiler/testData/diagnostics/tests/callableReference/resolve/commonSupertypeFromReturnTypesOfCallableReference.kt b/compiler/testData/diagnostics/tests/callableReference/resolve/commonSupertypeFromReturnTypesOfCallableReference.kt
index ee42cd44b7a..ebf5ab2320f 100644
--- a/compiler/testData/diagnostics/tests/callableReference/resolve/commonSupertypeFromReturnTypesOfCallableReference.kt
+++ b/compiler/testData/diagnostics/tests/callableReference/resolve/commonSupertypeFromReturnTypesOfCallableReference.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_EXPRESSION
 
 interface Parent
diff --git a/compiler/testData/diagnostics/tests/callableReference/resolve/eagerAndPostponedCallableReferences.fir.kt b/compiler/testData/diagnostics/tests/callableReference/resolve/eagerAndPostponedCallableReferences.fir.kt
index c71f31484df..1e5648e4b02 100644
--- a/compiler/testData/diagnostics/tests/callableReference/resolve/eagerAndPostponedCallableReferences.fir.kt
+++ b/compiler/testData/diagnostics/tests/callableReference/resolve/eagerAndPostponedCallableReferences.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_EXPRESSION
 
 interface A
diff --git a/compiler/testData/diagnostics/tests/callableReference/resolve/eagerAndPostponedCallableReferences.kt b/compiler/testData/diagnostics/tests/callableReference/resolve/eagerAndPostponedCallableReferences.kt
index b1e401f2192..d1deef62b54 100644
--- a/compiler/testData/diagnostics/tests/callableReference/resolve/eagerAndPostponedCallableReferences.kt
+++ b/compiler/testData/diagnostics/tests/callableReference/resolve/eagerAndPostponedCallableReferences.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_EXPRESSION
 
 interface A
diff --git a/compiler/testData/diagnostics/tests/callableReference/resolve/kt35887.kt b/compiler/testData/diagnostics/tests/callableReference/resolve/kt35887.kt
index 3b742bdf7a9..e1515075864 100644
--- a/compiler/testData/diagnostics/tests/callableReference/resolve/kt35887.kt
+++ b/compiler/testData/diagnostics/tests/callableReference/resolve/kt35887.kt
@@ -1,6 +1,5 @@
 // FIR_IDENTICAL
 // SKIP_TXT
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 import kotlin.reflect.KProperty0
 import kotlin.reflect.KProperty1
diff --git a/compiler/testData/diagnostics/tests/callableReference/resolve/kt35887_simple.fir.kt b/compiler/testData/diagnostics/tests/callableReference/resolve/kt35887_simple.fir.kt
index 5b9bf3ff347..4d11a06d1b4 100644
--- a/compiler/testData/diagnostics/tests/callableReference/resolve/kt35887_simple.fir.kt
+++ b/compiler/testData/diagnostics/tests/callableReference/resolve/kt35887_simple.fir.kt
@@ -1,5 +1,4 @@
 // SKIP_TXT
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 import kotlin.reflect.KProperty0
 
diff --git a/compiler/testData/diagnostics/tests/callableReference/resolve/kt35887_simple.kt b/compiler/testData/diagnostics/tests/callableReference/resolve/kt35887_simple.kt
index 7ec3b81bc9c..7b4e2a51c52 100644
--- a/compiler/testData/diagnostics/tests/callableReference/resolve/kt35887_simple.kt
+++ b/compiler/testData/diagnostics/tests/callableReference/resolve/kt35887_simple.kt
@@ -1,5 +1,4 @@
 // SKIP_TXT
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 import kotlin.reflect.KProperty0
 
diff --git a/compiler/testData/diagnostics/tests/callableReference/resolve/kt35920.fir.kt b/compiler/testData/diagnostics/tests/callableReference/resolve/kt35920.fir.kt
index e157831486d..e411f198828 100644
--- a/compiler/testData/diagnostics/tests/callableReference/resolve/kt35920.fir.kt
+++ b/compiler/testData/diagnostics/tests/callableReference/resolve/kt35920.fir.kt
@@ -1,5 +1,4 @@
 // SKIP_TXT
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // FILE: JavaClass.java
 public class JavaClass<R> {
diff --git a/compiler/testData/diagnostics/tests/callableReference/resolve/kt35920.kt b/compiler/testData/diagnostics/tests/callableReference/resolve/kt35920.kt
index a266d1eadff..0dd6c8c5ef3 100644
--- a/compiler/testData/diagnostics/tests/callableReference/resolve/kt35920.kt
+++ b/compiler/testData/diagnostics/tests/callableReference/resolve/kt35920.kt
@@ -1,5 +1,4 @@
 // SKIP_TXT
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // FILE: JavaClass.java
 public class JavaClass<R> {
diff --git a/compiler/testData/diagnostics/tests/callableReference/resolve/multipleOutersAndMultipleCallableReferences.kt b/compiler/testData/diagnostics/tests/callableReference/resolve/multipleOutersAndMultipleCallableReferences.kt
index 6be74e6b805..cd1a6988c99 100644
--- a/compiler/testData/diagnostics/tests/callableReference/resolve/multipleOutersAndMultipleCallableReferences.kt
+++ b/compiler/testData/diagnostics/tests/callableReference/resolve/multipleOutersAndMultipleCallableReferences.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 interface Base
diff --git a/compiler/testData/diagnostics/tests/callableReference/resolve/postponedResolveOfManyCallableReference.kt b/compiler/testData/diagnostics/tests/callableReference/resolve/postponedResolveOfManyCallableReference.kt
index 34108c51820..37afea7eef1 100644
--- a/compiler/testData/diagnostics/tests/callableReference/resolve/postponedResolveOfManyCallableReference.kt
+++ b/compiler/testData/diagnostics/tests/callableReference/resolve/postponedResolveOfManyCallableReference.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE
 
 interface A
diff --git a/compiler/testData/diagnostics/tests/callableReference/resolve/resolveCallableReferencesAfterAllSimpleArguments.fir.kt b/compiler/testData/diagnostics/tests/callableReference/resolve/resolveCallableReferencesAfterAllSimpleArguments.fir.kt
index fea145e1be9..f0e0b5d4c87 100644
--- a/compiler/testData/diagnostics/tests/callableReference/resolve/resolveCallableReferencesAfterAllSimpleArguments.fir.kt
+++ b/compiler/testData/diagnostics/tests/callableReference/resolve/resolveCallableReferencesAfterAllSimpleArguments.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 interface A
diff --git a/compiler/testData/diagnostics/tests/callableReference/resolve/resolveCallableReferencesAfterAllSimpleArguments.kt b/compiler/testData/diagnostics/tests/callableReference/resolve/resolveCallableReferencesAfterAllSimpleArguments.kt
index 53e13b9a6d3..4d4739e76c1 100644
--- a/compiler/testData/diagnostics/tests/callableReference/resolve/resolveCallableReferencesAfterAllSimpleArguments.kt
+++ b/compiler/testData/diagnostics/tests/callableReference/resolve/resolveCallableReferencesAfterAllSimpleArguments.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 interface A
diff --git a/compiler/testData/diagnostics/tests/callableReference/resolve/resolveEqualsOperatorWithAnyExpectedType.kt b/compiler/testData/diagnostics/tests/callableReference/resolve/resolveEqualsOperatorWithAnyExpectedType.kt
index 90f2e95306c..3f1bbf96c2e 100644
--- a/compiler/testData/diagnostics/tests/callableReference/resolve/resolveEqualsOperatorWithAnyExpectedType.kt
+++ b/compiler/testData/diagnostics/tests/callableReference/resolve/resolveEqualsOperatorWithAnyExpectedType.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 
 interface Base
 
diff --git a/compiler/testData/diagnostics/tests/callableReference/resolve/resolveTwoReferencesAgainstGenerics.kt b/compiler/testData/diagnostics/tests/callableReference/resolve/resolveTwoReferencesAgainstGenerics.kt
index 5481b6e92bb..6cb384ffb06 100644
--- a/compiler/testData/diagnostics/tests/callableReference/resolve/resolveTwoReferencesAgainstGenerics.kt
+++ b/compiler/testData/diagnostics/tests/callableReference/resolve/resolveTwoReferencesAgainstGenerics.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // WITH_STDLIB
 
diff --git a/compiler/testData/diagnostics/tests/callableReference/rewriteAtSliceOnGetOperator.kt b/compiler/testData/diagnostics/tests/callableReference/rewriteAtSliceOnGetOperator.kt
index 7d9556225ca..428729af560 100644
--- a/compiler/testData/diagnostics/tests/callableReference/rewriteAtSliceOnGetOperator.kt
+++ b/compiler/testData/diagnostics/tests/callableReference/rewriteAtSliceOnGetOperator.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 import kotlin.reflect.KProperty1
diff --git a/compiler/testData/diagnostics/tests/callableReference/subtypeArgumentFromRHSForReference.kt b/compiler/testData/diagnostics/tests/callableReference/subtypeArgumentFromRHSForReference.kt
index 6da26cea28f..b3b8f687986 100644
--- a/compiler/testData/diagnostics/tests/callableReference/subtypeArgumentFromRHSForReference.kt
+++ b/compiler/testData/diagnostics/tests/callableReference/subtypeArgumentFromRHSForReference.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 import kotlin.reflect.*
diff --git a/compiler/testData/diagnostics/tests/collectionLiterals/collectionLiteralsOutsideOfAnnotations.kt b/compiler/testData/diagnostics/tests/collectionLiterals/collectionLiteralsOutsideOfAnnotations.kt
index 4a741d80718..c3a917e9597 100644
--- a/compiler/testData/diagnostics/tests/collectionLiterals/collectionLiteralsOutsideOfAnnotations.kt
+++ b/compiler/testData/diagnostics/tests/collectionLiterals/collectionLiteralsOutsideOfAnnotations.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -UNUSED_PARAMETER
 
 fun takeArray(array: Array<String>) {}
diff --git a/compiler/testData/diagnostics/tests/controlStructures/kt30406.fir.kt b/compiler/testData/diagnostics/tests/controlStructures/kt30406.fir.kt
index 84e3d4291e9..05c1456d1c8 100644
--- a/compiler/testData/diagnostics/tests/controlStructures/kt30406.fir.kt
+++ b/compiler/testData/diagnostics/tests/controlStructures/kt30406.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // !CHECK_TYPE
 // Issue: KT-30406
diff --git a/compiler/testData/diagnostics/tests/controlStructures/kt30406.kt b/compiler/testData/diagnostics/tests/controlStructures/kt30406.kt
index e4deb5797b8..2bbfc21d256 100644
--- a/compiler/testData/diagnostics/tests/controlStructures/kt30406.kt
+++ b/compiler/testData/diagnostics/tests/controlStructures/kt30406.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // !CHECK_TYPE
 // Issue: KT-30406
diff --git a/compiler/testData/diagnostics/tests/delegatedProperty/inference/callableReferenceArgumentInDelegatedExpression.kt b/compiler/testData/diagnostics/tests/delegatedProperty/inference/callableReferenceArgumentInDelegatedExpression.kt
index 1413c1c4e75..8b31600d9e2 100644
--- a/compiler/testData/diagnostics/tests/delegatedProperty/inference/callableReferenceArgumentInDelegatedExpression.kt
+++ b/compiler/testData/diagnostics/tests/delegatedProperty/inference/callableReferenceArgumentInDelegatedExpression.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 import kotlin.reflect.KProperty
diff --git a/compiler/testData/diagnostics/tests/delegatedProperty/inference/delegatedExpressionWithLabeledReturnInsideLambda.kt b/compiler/testData/diagnostics/tests/delegatedProperty/inference/delegatedExpressionWithLabeledReturnInsideLambda.kt
index cef2f0d193d..e4efe4db00e 100644
--- a/compiler/testData/diagnostics/tests/delegatedProperty/inference/delegatedExpressionWithLabeledReturnInsideLambda.kt
+++ b/compiler/testData/diagnostics/tests/delegatedProperty/inference/delegatedExpressionWithLabeledReturnInsideLambda.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE
 
 class Delegate<T>
diff --git a/compiler/testData/diagnostics/tests/delegatedProperty/provideDelegate/overloadResolutionForSeveralProvideDelegates.kt b/compiler/testData/diagnostics/tests/delegatedProperty/provideDelegate/overloadResolutionForSeveralProvideDelegates.kt
index d64dad0cbe4..cd18bdd7640 100644
--- a/compiler/testData/diagnostics/tests/delegatedProperty/provideDelegate/overloadResolutionForSeveralProvideDelegates.kt
+++ b/compiler/testData/diagnostics/tests/delegatedProperty/provideDelegate/overloadResolutionForSeveralProvideDelegates.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE
 
 import kotlin.reflect.KProperty
diff --git a/compiler/testData/diagnostics/tests/funInterface/basicFunInterfaceConversion.kt b/compiler/testData/diagnostics/tests/funInterface/basicFunInterfaceConversion.kt
index cf2be4adc3a..d8017185133 100644
--- a/compiler/testData/diagnostics/tests/funInterface/basicFunInterfaceConversion.kt
+++ b/compiler/testData/diagnostics/tests/funInterface/basicFunInterfaceConversion.kt
@@ -1,5 +1,5 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference +FunctionalInterfaceConversion +SamConversionPerArgument +SamConversionForKotlinFunctions
+// !LANGUAGE: +FunctionalInterfaceConversion +SamConversionPerArgument +SamConversionForKotlinFunctions
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 fun interface Foo {
diff --git a/compiler/testData/diagnostics/tests/funInterface/funInterfaceSyntheticConstructors.kt b/compiler/testData/diagnostics/tests/funInterface/funInterfaceSyntheticConstructors.kt
index b465994e13e..ef4f965f314 100644
--- a/compiler/testData/diagnostics/tests/funInterface/funInterfaceSyntheticConstructors.kt
+++ b/compiler/testData/diagnostics/tests/funInterface/funInterfaceSyntheticConstructors.kt
@@ -1,5 +1,5 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference +SamConversionForKotlinFunctions +SamConversionPerArgument +FunctionalInterfaceConversion
+// !LANGUAGE: +SamConversionForKotlinFunctions +SamConversionPerArgument +FunctionalInterfaceConversion
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 fun interface KRunnable {
diff --git a/compiler/testData/diagnostics/tests/funInterface/funIsNotInheritedFromBaseInterface.fir.kt b/compiler/testData/diagnostics/tests/funInterface/funIsNotInheritedFromBaseInterface.fir.kt
index 050c9a5a518..4032bfd00f9 100644
--- a/compiler/testData/diagnostics/tests/funInterface/funIsNotInheritedFromBaseInterface.fir.kt
+++ b/compiler/testData/diagnostics/tests/funInterface/funIsNotInheritedFromBaseInterface.fir.kt
@@ -1,4 +1,4 @@
-// !LANGUAGE: +NewInference +FunctionalInterfaceConversion +SamConversionPerArgument +SamConversionForKotlinFunctions
+// !LANGUAGE: +FunctionalInterfaceConversion +SamConversionPerArgument +SamConversionForKotlinFunctions
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 fun interface Base {
diff --git a/compiler/testData/diagnostics/tests/funInterface/funIsNotInheritedFromBaseInterface.kt b/compiler/testData/diagnostics/tests/funInterface/funIsNotInheritedFromBaseInterface.kt
index 3c3f2b6178b..b6ce93855e8 100644
--- a/compiler/testData/diagnostics/tests/funInterface/funIsNotInheritedFromBaseInterface.kt
+++ b/compiler/testData/diagnostics/tests/funInterface/funIsNotInheritedFromBaseInterface.kt
@@ -1,4 +1,4 @@
-// !LANGUAGE: +NewInference +FunctionalInterfaceConversion +SamConversionPerArgument +SamConversionForKotlinFunctions
+// !LANGUAGE: +FunctionalInterfaceConversion +SamConversionPerArgument +SamConversionForKotlinFunctions
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 fun interface Base {
diff --git a/compiler/testData/diagnostics/tests/funInterface/genericSubstitutionForFunInterface.kt b/compiler/testData/diagnostics/tests/funInterface/genericSubstitutionForFunInterface.kt
index b208c6ed58a..db23beed44b 100644
--- a/compiler/testData/diagnostics/tests/funInterface/genericSubstitutionForFunInterface.kt
+++ b/compiler/testData/diagnostics/tests/funInterface/genericSubstitutionForFunInterface.kt
@@ -1,5 +1,5 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference +SamConversionForKotlinFunctions +SamConversionPerArgument +FunctionalInterfaceConversion
+// !LANGUAGE: +SamConversionForKotlinFunctions +SamConversionPerArgument +FunctionalInterfaceConversion
 // !CHECK_TYPE
 
 fun interface F<S> {
diff --git a/compiler/testData/diagnostics/tests/funInterface/severalConversionsForFunInterface.kt b/compiler/testData/diagnostics/tests/funInterface/severalConversionsForFunInterface.kt
index 715897425be..94d34430e0e 100644
--- a/compiler/testData/diagnostics/tests/funInterface/severalConversionsForFunInterface.kt
+++ b/compiler/testData/diagnostics/tests/funInterface/severalConversionsForFunInterface.kt
@@ -1,5 +1,5 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference +SamConversionForKotlinFunctions +SamConversionPerArgument +FunctionalInterfaceConversion
+// !LANGUAGE: +SamConversionForKotlinFunctions +SamConversionPerArgument +FunctionalInterfaceConversion
 
 interface J {
     fun foo1(r: KRunnable)
diff --git a/compiler/testData/diagnostics/tests/funInterface/suspendFunInterfaceConversion.kt b/compiler/testData/diagnostics/tests/funInterface/suspendFunInterfaceConversion.kt
index 0e82d898a1f..885cf5f00ec 100644
--- a/compiler/testData/diagnostics/tests/funInterface/suspendFunInterfaceConversion.kt
+++ b/compiler/testData/diagnostics/tests/funInterface/suspendFunInterfaceConversion.kt
@@ -1,5 +1,5 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference +SamConversionForKotlinFunctions +SamConversionPerArgument +FunctionalInterfaceConversion
+// !LANGUAGE: +SamConversionForKotlinFunctions +SamConversionPerArgument +FunctionalInterfaceConversion
 // !DIAGNOSTICS: -UNUSED_PARAMETER -NOTHING_TO_INLINE
 
 fun interface SuspendRunnable {
diff --git a/compiler/testData/diagnostics/tests/functionLiterals/prematurelyAnalyzingLambdaWhileFixingTypeVariableForAnotherArgument.kt b/compiler/testData/diagnostics/tests/functionLiterals/prematurelyAnalyzingLambdaWhileFixingTypeVariableForAnotherArgument.kt
index 2fdf928a61b..d789ff00e8a 100644
--- a/compiler/testData/diagnostics/tests/functionLiterals/prematurelyAnalyzingLambdaWhileFixingTypeVariableForAnotherArgument.kt
+++ b/compiler/testData/diagnostics/tests/functionLiterals/prematurelyAnalyzingLambdaWhileFixingTypeVariableForAnotherArgument.kt
@@ -1,6 +1,5 @@
 // FIR_IDENTICAL
 // !DIAGNOSTICS: -UNUSED_PARAMETER
-// !LANGUAGE: +NewInference
 // SKIP_TXT
 // Issue: KT-35168
 
diff --git a/compiler/testData/diagnostics/tests/generics/bareTypesWithStarProjections.kt b/compiler/testData/diagnostics/tests/generics/bareTypesWithStarProjections.kt
index 3d7a9391c30..89b329933c3 100644
--- a/compiler/testData/diagnostics/tests/generics/bareTypesWithStarProjections.kt
+++ b/compiler/testData/diagnostics/tests/generics/bareTypesWithStarProjections.kt
@@ -1,7 +1,6 @@
 // FIR_IDENTICAL
 // SKIP_TXT
 // !CHECK_TYPE
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 interface FirMemberDeclaration : FirDeclaration
diff --git a/compiler/testData/diagnostics/tests/generics/capturedParameters/captured.fir.kt b/compiler/testData/diagnostics/tests/generics/capturedParameters/captured.fir.kt
index 93d5795cd96..fcfa88dd633 100644
--- a/compiler/testData/diagnostics/tests/generics/capturedParameters/captured.fir.kt
+++ b/compiler/testData/diagnostics/tests/generics/capturedParameters/captured.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 class X {
diff --git a/compiler/testData/diagnostics/tests/generics/capturedParameters/captured.kt b/compiler/testData/diagnostics/tests/generics/capturedParameters/captured.kt
index df1878010e7..7ec18ab2b1d 100644
--- a/compiler/testData/diagnostics/tests/generics/capturedParameters/captured.kt
+++ b/compiler/testData/diagnostics/tests/generics/capturedParameters/captured.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 class X {
diff --git a/compiler/testData/diagnostics/tests/generics/kt34729.fir.kt b/compiler/testData/diagnostics/tests/generics/kt34729.fir.kt
index 2c3f763878d..56d43e935a0 100644
--- a/compiler/testData/diagnostics/tests/generics/kt34729.fir.kt
+++ b/compiler/testData/diagnostics/tests/generics/kt34729.fir.kt
@@ -1,5 +1,4 @@
 // !DIAGNOSTICS: -UNUSED_PARAMETER
-// !LANGUAGE: +NewInference
 
 interface ILength {
     val length: Int
diff --git a/compiler/testData/diagnostics/tests/generics/kt34729.kt b/compiler/testData/diagnostics/tests/generics/kt34729.kt
index 03eb5f03a3a..cc458d409b9 100644
--- a/compiler/testData/diagnostics/tests/generics/kt34729.kt
+++ b/compiler/testData/diagnostics/tests/generics/kt34729.kt
@@ -1,5 +1,4 @@
 // !DIAGNOSTICS: -UNUSED_PARAMETER
-// !LANGUAGE: +NewInference
 
 interface ILength {
     val length: Int
diff --git a/compiler/testData/diagnostics/tests/generics/nullability/considerTypeNotNullOnlyIfItHasNotNullBound.fir.kt b/compiler/testData/diagnostics/tests/generics/nullability/considerTypeNotNullOnlyIfItHasNotNullBound.fir.kt
index 4a94cf70a71..a05681b19ee 100644
--- a/compiler/testData/diagnostics/tests/generics/nullability/considerTypeNotNullOnlyIfItHasNotNullBound.fir.kt
+++ b/compiler/testData/diagnostics/tests/generics/nullability/considerTypeNotNullOnlyIfItHasNotNullBound.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 
 inline fun <T, reified S> foo(x: T?, y: T): T {
     if (x is S) return <!RETURN_TYPE_MISMATCH!>x<!>
diff --git a/compiler/testData/diagnostics/tests/generics/nullability/considerTypeNotNullOnlyIfItHasNotNullBound.kt b/compiler/testData/diagnostics/tests/generics/nullability/considerTypeNotNullOnlyIfItHasNotNullBound.kt
index db106d01917..d3e5925d865 100644
--- a/compiler/testData/diagnostics/tests/generics/nullability/considerTypeNotNullOnlyIfItHasNotNullBound.kt
+++ b/compiler/testData/diagnostics/tests/generics/nullability/considerTypeNotNullOnlyIfItHasNotNullBound.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 
 inline fun <T, reified S> foo(x: T?, y: T): T {
     if (x is S) return <!TYPE_MISMATCH!>x<!>
diff --git a/compiler/testData/diagnostics/tests/generics/nullability/inferNotNullTypeFromIntersectionOfNullableTypes.fir.kt b/compiler/testData/diagnostics/tests/generics/nullability/inferNotNullTypeFromIntersectionOfNullableTypes.fir.kt
index 0a8e1644657..3b3958595e1 100644
--- a/compiler/testData/diagnostics/tests/generics/nullability/inferNotNullTypeFromIntersectionOfNullableTypes.fir.kt
+++ b/compiler/testData/diagnostics/tests/generics/nullability/inferNotNullTypeFromIntersectionOfNullableTypes.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 
 fun simpleTypeAndNumberType(b: Comparable<*>?) {
     if (b is Byte?) {
diff --git a/compiler/testData/diagnostics/tests/generics/nullability/inferNotNullTypeFromIntersectionOfNullableTypes.kt b/compiler/testData/diagnostics/tests/generics/nullability/inferNotNullTypeFromIntersectionOfNullableTypes.kt
index d07d1064a52..0ed1effab1d 100644
--- a/compiler/testData/diagnostics/tests/generics/nullability/inferNotNullTypeFromIntersectionOfNullableTypes.kt
+++ b/compiler/testData/diagnostics/tests/generics/nullability/inferNotNullTypeFromIntersectionOfNullableTypes.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 
 fun simpleTypeAndNumberType(b: Comparable<*>?) {
     if (b is Byte?) {
diff --git a/compiler/testData/diagnostics/tests/generics/nullability/kt25182.kt b/compiler/testData/diagnostics/tests/generics/nullability/kt25182.kt
index 337c99428ff..196cdc6493e 100644
--- a/compiler/testData/diagnostics/tests/generics/nullability/kt25182.kt
+++ b/compiler/testData/diagnostics/tests/generics/nullability/kt25182.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 abstract class Expr<T>
diff --git a/compiler/testData/diagnostics/tests/generics/nullability/notNullSmartcastOnIntersectionOfNullables.fir.kt b/compiler/testData/diagnostics/tests/generics/nullability/notNullSmartcastOnIntersectionOfNullables.fir.kt
index dd0d6de0461..19a98f40bf9 100644
--- a/compiler/testData/diagnostics/tests/generics/nullability/notNullSmartcastOnIntersectionOfNullables.fir.kt
+++ b/compiler/testData/diagnostics/tests/generics/nullability/notNullSmartcastOnIntersectionOfNullables.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 interface A
diff --git a/compiler/testData/diagnostics/tests/generics/nullability/notNullSmartcastOnIntersectionOfNullables.kt b/compiler/testData/diagnostics/tests/generics/nullability/notNullSmartcastOnIntersectionOfNullables.kt
index e4501bca208..95d1622e7ca 100644
--- a/compiler/testData/diagnostics/tests/generics/nullability/notNullSmartcastOnIntersectionOfNullables.kt
+++ b/compiler/testData/diagnostics/tests/generics/nullability/notNullSmartcastOnIntersectionOfNullables.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 interface A
diff --git a/compiler/testData/diagnostics/tests/inference/capturedInProjectedFlexibleType.kt b/compiler/testData/diagnostics/tests/inference/capturedInProjectedFlexibleType.kt
index 10133ec4e08..bc4105cd40b 100644
--- a/compiler/testData/diagnostics/tests/inference/capturedInProjectedFlexibleType.kt
+++ b/compiler/testData/diagnostics/tests/inference/capturedInProjectedFlexibleType.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 // FILE: A.java
diff --git a/compiler/testData/diagnostics/tests/inference/capturedTypes/capturedTypeWithInnerTypealias.kt b/compiler/testData/diagnostics/tests/inference/capturedTypes/capturedTypeWithInnerTypealias.kt
index 06e76c5b256..f7aab21509e 100644
--- a/compiler/testData/diagnostics/tests/inference/capturedTypes/capturedTypeWithInnerTypealias.kt
+++ b/compiler/testData/diagnostics/tests/inference/capturedTypes/capturedTypeWithInnerTypealias.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 
 import kotlin.reflect.KClass
 
diff --git a/compiler/testData/diagnostics/tests/inference/capturedTypes/kt25302.kt b/compiler/testData/diagnostics/tests/inference/capturedTypes/kt25302.kt
index 5b6f0c61a5c..451a0ed004f 100644
--- a/compiler/testData/diagnostics/tests/inference/capturedTypes/kt25302.kt
+++ b/compiler/testData/diagnostics/tests/inference/capturedTypes/kt25302.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 interface CollectorMock<A, R>
diff --git a/compiler/testData/diagnostics/tests/inference/coercionToUnit/coercionToUnitForIfAsLastExpressionInLambda.fir.kt b/compiler/testData/diagnostics/tests/inference/coercionToUnit/coercionToUnitForIfAsLastExpressionInLambda.fir.kt
index fad8594a36a..9b7dad0f67e 100644
--- a/compiler/testData/diagnostics/tests/inference/coercionToUnit/coercionToUnitForIfAsLastExpressionInLambda.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/coercionToUnit/coercionToUnitForIfAsLastExpressionInLambda.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 
 class Obj
 
diff --git a/compiler/testData/diagnostics/tests/inference/coercionToUnit/coercionToUnitForIfAsLastExpressionInLambda.kt b/compiler/testData/diagnostics/tests/inference/coercionToUnit/coercionToUnitForIfAsLastExpressionInLambda.kt
index 29a517371a5..96502d5f9aa 100644
--- a/compiler/testData/diagnostics/tests/inference/coercionToUnit/coercionToUnitForIfAsLastExpressionInLambda.kt
+++ b/compiler/testData/diagnostics/tests/inference/coercionToUnit/coercionToUnitForIfAsLastExpressionInLambda.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 
 class Obj
 
diff --git a/compiler/testData/diagnostics/tests/inference/coercionToUnit/coercionToUnitReference.kt b/compiler/testData/diagnostics/tests/inference/coercionToUnit/coercionToUnitReference.kt
index 6be9c645d8d..ea52467266e 100644
--- a/compiler/testData/diagnostics/tests/inference/coercionToUnit/coercionToUnitReference.kt
+++ b/compiler/testData/diagnostics/tests/inference/coercionToUnit/coercionToUnitReference.kt
@@ -1,7 +1,6 @@
 // FIR_IDENTICAL
 // SKIP_TXT
 // !DIAGNOSTICS: -UNUSED_PARAMETER
-// !LANGUAGE: +NewInference
 
 fun foo(f: () -> Unit) {}
 fun bar(): Int = 42
diff --git a/compiler/testData/diagnostics/tests/inference/coercionToUnit/coercionWithExplicitTypeArgument.kt b/compiler/testData/diagnostics/tests/inference/coercionToUnit/coercionWithExplicitTypeArgument.kt
index e2ccf82b620..57b8a82c20c 100644
--- a/compiler/testData/diagnostics/tests/inference/coercionToUnit/coercionWithExplicitTypeArgument.kt
+++ b/compiler/testData/diagnostics/tests/inference/coercionToUnit/coercionWithExplicitTypeArgument.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE
 
 fun foo() {
diff --git a/compiler/testData/diagnostics/tests/inference/coercionToUnit/nonPropagationOfCoercionToUnitInsideNestedLambda.fir.kt b/compiler/testData/diagnostics/tests/inference/coercionToUnit/nonPropagationOfCoercionToUnitInsideNestedLambda.fir.kt
index 6adfb804c0b..6c3f1966720 100644
--- a/compiler/testData/diagnostics/tests/inference/coercionToUnit/nonPropagationOfCoercionToUnitInsideNestedLambda.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/coercionToUnit/nonPropagationOfCoercionToUnitInsideNestedLambda.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 
 class Obj
 
diff --git a/compiler/testData/diagnostics/tests/inference/coercionToUnit/nonPropagationOfCoercionToUnitInsideNestedLambda.kt b/compiler/testData/diagnostics/tests/inference/coercionToUnit/nonPropagationOfCoercionToUnitInsideNestedLambda.kt
index 05f01522125..ed535c3f56a 100644
--- a/compiler/testData/diagnostics/tests/inference/coercionToUnit/nonPropagationOfCoercionToUnitInsideNestedLambda.kt
+++ b/compiler/testData/diagnostics/tests/inference/coercionToUnit/nonPropagationOfCoercionToUnitInsideNestedLambda.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 
 class Obj
 
diff --git a/compiler/testData/diagnostics/tests/inference/commonSuperTypeOfErrorTypes.fir.kt b/compiler/testData/diagnostics/tests/inference/commonSuperTypeOfErrorTypes.fir.kt
index 0a0f2941a85..91ffcc331dd 100644
--- a/compiler/testData/diagnostics/tests/inference/commonSuperTypeOfErrorTypes.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/commonSuperTypeOfErrorTypes.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNCHECKED_CAST
 
 class Foo<T>
diff --git a/compiler/testData/diagnostics/tests/inference/commonSuperTypeOfErrorTypes.kt b/compiler/testData/diagnostics/tests/inference/commonSuperTypeOfErrorTypes.kt
index 69f584fe8ef..038608190d2 100644
--- a/compiler/testData/diagnostics/tests/inference/commonSuperTypeOfErrorTypes.kt
+++ b/compiler/testData/diagnostics/tests/inference/commonSuperTypeOfErrorTypes.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNCHECKED_CAST
 
 class Foo<T>
diff --git a/compiler/testData/diagnostics/tests/inference/commonSuperTypeOfTypesWithErrorSupertypes.fir.kt b/compiler/testData/diagnostics/tests/inference/commonSuperTypeOfTypesWithErrorSupertypes.fir.kt
index 6ab18edddc3..d01391c036c 100644
--- a/compiler/testData/diagnostics/tests/inference/commonSuperTypeOfTypesWithErrorSupertypes.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/commonSuperTypeOfTypesWithErrorSupertypes.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 interface Foo<F> {
diff --git a/compiler/testData/diagnostics/tests/inference/commonSuperTypeOfTypesWithErrorSupertypes.kt b/compiler/testData/diagnostics/tests/inference/commonSuperTypeOfTypesWithErrorSupertypes.kt
index 49e25f791f9..12d72c8aecf 100644
--- a/compiler/testData/diagnostics/tests/inference/commonSuperTypeOfTypesWithErrorSupertypes.kt
+++ b/compiler/testData/diagnostics/tests/inference/commonSuperTypeOfTypesWithErrorSupertypes.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 interface Foo<F> {
diff --git a/compiler/testData/diagnostics/tests/inference/commonSystem/cstFromNullableChildAndNonParameterizedType.fir.kt b/compiler/testData/diagnostics/tests/inference/commonSystem/cstFromNullableChildAndNonParameterizedType.fir.kt
index 73eba954b72..85894a43af9 100644
--- a/compiler/testData/diagnostics/tests/inference/commonSystem/cstFromNullableChildAndNonParameterizedType.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/commonSystem/cstFromNullableChildAndNonParameterizedType.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 interface Base<out T>
diff --git a/compiler/testData/diagnostics/tests/inference/commonSystem/cstFromNullableChildAndNonParameterizedType.kt b/compiler/testData/diagnostics/tests/inference/commonSystem/cstFromNullableChildAndNonParameterizedType.kt
index efa24dd7bea..653311d6f66 100644
--- a/compiler/testData/diagnostics/tests/inference/commonSystem/cstFromNullableChildAndNonParameterizedType.kt
+++ b/compiler/testData/diagnostics/tests/inference/commonSystem/cstFromNullableChildAndNonParameterizedType.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 interface Base<out T>
diff --git a/compiler/testData/diagnostics/tests/inference/commonSystem/cstWithTypeContainingNonFixedVariable.fir.kt b/compiler/testData/diagnostics/tests/inference/commonSystem/cstWithTypeContainingNonFixedVariable.fir.kt
index 4c23598c1e7..897a0de0391 100644
--- a/compiler/testData/diagnostics/tests/inference/commonSystem/cstWithTypeContainingNonFixedVariable.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/commonSystem/cstWithTypeContainingNonFixedVariable.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_EXPRESSION
 
 fun <T> select(x: T, y: T): T = x
diff --git a/compiler/testData/diagnostics/tests/inference/commonSystem/cstWithTypeContainingNonFixedVariable.kt b/compiler/testData/diagnostics/tests/inference/commonSystem/cstWithTypeContainingNonFixedVariable.kt
index 41441411794..2cbb1782f33 100644
--- a/compiler/testData/diagnostics/tests/inference/commonSystem/cstWithTypeContainingNonFixedVariable.kt
+++ b/compiler/testData/diagnostics/tests/inference/commonSystem/cstWithTypeContainingNonFixedVariable.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_EXPRESSION
 
 fun <T> select(x: T, y: T): T = x
diff --git a/compiler/testData/diagnostics/tests/inference/commonSystem/kt30300.fir.kt b/compiler/testData/diagnostics/tests/inference/commonSystem/kt30300.fir.kt
index 7d100e7d50e..cf4e089b212 100644
--- a/compiler/testData/diagnostics/tests/inference/commonSystem/kt30300.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/commonSystem/kt30300.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // Issue: KT-30300
 
diff --git a/compiler/testData/diagnostics/tests/inference/commonSystem/kt30300.kt b/compiler/testData/diagnostics/tests/inference/commonSystem/kt30300.kt
index 00dba302127..4f457c97e8e 100644
--- a/compiler/testData/diagnostics/tests/inference/commonSystem/kt30300.kt
+++ b/compiler/testData/diagnostics/tests/inference/commonSystem/kt30300.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // Issue: KT-30300
 
diff --git a/compiler/testData/diagnostics/tests/inference/commonSystem/kt33197.fir.kt b/compiler/testData/diagnostics/tests/inference/commonSystem/kt33197.fir.kt
index c36a9aa4909..7c9fa7647f1 100644
--- a/compiler/testData/diagnostics/tests/inference/commonSystem/kt33197.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/commonSystem/kt33197.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 
 fun test(condition: Boolean) {
diff --git a/compiler/testData/diagnostics/tests/inference/commonSystem/kt33197.kt b/compiler/testData/diagnostics/tests/inference/commonSystem/kt33197.kt
index bd2dcf71e39..e0e9c7d9e6e 100644
--- a/compiler/testData/diagnostics/tests/inference/commonSystem/kt33197.kt
+++ b/compiler/testData/diagnostics/tests/inference/commonSystem/kt33197.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 
 fun test(condition: Boolean) {
diff --git a/compiler/testData/diagnostics/tests/inference/commonSystem/lessSpecificTypeForArgumentCallWithExactAnnotation_ni.fir.kt b/compiler/testData/diagnostics/tests/inference/commonSystem/lessSpecificTypeForArgumentCallWithExactAnnotation_ni.fir.kt
index b3289dd2fd6..cb9a0ce05c1 100644
--- a/compiler/testData/diagnostics/tests/inference/commonSystem/lessSpecificTypeForArgumentCallWithExactAnnotation_ni.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/commonSystem/lessSpecificTypeForArgumentCallWithExactAnnotation_ni.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 interface A
diff --git a/compiler/testData/diagnostics/tests/inference/commonSystem/lessSpecificTypeForArgumentCallWithExactAnnotation_ni.kt b/compiler/testData/diagnostics/tests/inference/commonSystem/lessSpecificTypeForArgumentCallWithExactAnnotation_ni.kt
index 014c3399caa..f7ab5e96486 100644
--- a/compiler/testData/diagnostics/tests/inference/commonSystem/lessSpecificTypeForArgumentCallWithExactAnnotation_ni.kt
+++ b/compiler/testData/diagnostics/tests/inference/commonSystem/lessSpecificTypeForArgumentCallWithExactAnnotation_ni.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 interface A
diff --git a/compiler/testData/diagnostics/tests/inference/commonSystem/manyArgumentsForVararg.kt b/compiler/testData/diagnostics/tests/inference/commonSystem/manyArgumentsForVararg.kt
index 1700cd296df..a7cd40db977 100644
--- a/compiler/testData/diagnostics/tests/inference/commonSystem/manyArgumentsForVararg.kt
+++ b/compiler/testData/diagnostics/tests/inference/commonSystem/manyArgumentsForVararg.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 val prop = mapOf(
diff --git a/compiler/testData/diagnostics/tests/inference/commonSystem/nonFixedVariableFromBothBranches.fir.kt b/compiler/testData/diagnostics/tests/inference/commonSystem/nonFixedVariableFromBothBranches.fir.kt
index 03c5bcddc2e..e2dd3d86cb4 100644
--- a/compiler/testData/diagnostics/tests/inference/commonSystem/nonFixedVariableFromBothBranches.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/commonSystem/nonFixedVariableFromBothBranches.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_EXPRESSION
 
 // FILE: JavaTest.java
diff --git a/compiler/testData/diagnostics/tests/inference/commonSystem/nonFixedVariableFromBothBranches.kt b/compiler/testData/diagnostics/tests/inference/commonSystem/nonFixedVariableFromBothBranches.kt
index 3b672bd96c7..75522981860 100644
--- a/compiler/testData/diagnostics/tests/inference/commonSystem/nonFixedVariableFromBothBranches.kt
+++ b/compiler/testData/diagnostics/tests/inference/commonSystem/nonFixedVariableFromBothBranches.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_EXPRESSION
 
 // FILE: JavaTest.java
diff --git a/compiler/testData/diagnostics/tests/inference/commonSystem/nonFixedVariableInsideFlexibleType.fir.kt b/compiler/testData/diagnostics/tests/inference/commonSystem/nonFixedVariableInsideFlexibleType.fir.kt
index a354fea3d48..57e2ef8dcdf 100644
--- a/compiler/testData/diagnostics/tests/inference/commonSystem/nonFixedVariableInsideFlexibleType.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/commonSystem/nonFixedVariableInsideFlexibleType.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_EXPRESSION
 
 // FILE: Inv2.java
diff --git a/compiler/testData/diagnostics/tests/inference/commonSystem/nonFixedVariableInsideFlexibleType.kt b/compiler/testData/diagnostics/tests/inference/commonSystem/nonFixedVariableInsideFlexibleType.kt
index 48f47310336..acee210548e 100644
--- a/compiler/testData/diagnostics/tests/inference/commonSystem/nonFixedVariableInsideFlexibleType.kt
+++ b/compiler/testData/diagnostics/tests/inference/commonSystem/nonFixedVariableInsideFlexibleType.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_EXPRESSION
 
 // FILE: Inv2.java
diff --git a/compiler/testData/diagnostics/tests/inference/commonSystem/outProjectedTypeToOutProjected.kt b/compiler/testData/diagnostics/tests/inference/commonSystem/outProjectedTypeToOutProjected.kt
index facf5eb7746..8ad4d7bd98f 100644
--- a/compiler/testData/diagnostics/tests/inference/commonSystem/outProjectedTypeToOutProjected.kt
+++ b/compiler/testData/diagnostics/tests/inference/commonSystem/outProjectedTypeToOutProjected.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -UNUSED_PARAMETER
 
 class Inv<T>
diff --git a/compiler/testData/diagnostics/tests/inference/commonSystem/postponedCompletionWithExactAnnotation_ni.fir.kt b/compiler/testData/diagnostics/tests/inference/commonSystem/postponedCompletionWithExactAnnotation_ni.fir.kt
index 849c2b78422..59e2fbe15b7 100644
--- a/compiler/testData/diagnostics/tests/inference/commonSystem/postponedCompletionWithExactAnnotation_ni.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/commonSystem/postponedCompletionWithExactAnnotation_ni.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE -UNCHECKED_CAST
 
 interface ISample
diff --git a/compiler/testData/diagnostics/tests/inference/commonSystem/postponedCompletionWithExactAnnotation_ni.kt b/compiler/testData/diagnostics/tests/inference/commonSystem/postponedCompletionWithExactAnnotation_ni.kt
index a203301e479..e9d63627fad 100644
--- a/compiler/testData/diagnostics/tests/inference/commonSystem/postponedCompletionWithExactAnnotation_ni.kt
+++ b/compiler/testData/diagnostics/tests/inference/commonSystem/postponedCompletionWithExactAnnotation_ni.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE -UNCHECKED_CAST
 
 interface ISample
diff --git a/compiler/testData/diagnostics/tests/inference/commonSystem/selectFromTwoIncompatibleTypes.fir.kt b/compiler/testData/diagnostics/tests/inference/commonSystem/selectFromTwoIncompatibleTypes.fir.kt
index 11ce49a6588..344e8f124e1 100644
--- a/compiler/testData/diagnostics/tests/inference/commonSystem/selectFromTwoIncompatibleTypes.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/commonSystem/selectFromTwoIncompatibleTypes.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 class Inv<T>
diff --git a/compiler/testData/diagnostics/tests/inference/commonSystem/selectFromTwoIncompatibleTypes.kt b/compiler/testData/diagnostics/tests/inference/commonSystem/selectFromTwoIncompatibleTypes.kt
index c230bb349b3..2c1433cb057 100644
--- a/compiler/testData/diagnostics/tests/inference/commonSystem/selectFromTwoIncompatibleTypes.kt
+++ b/compiler/testData/diagnostics/tests/inference/commonSystem/selectFromTwoIncompatibleTypes.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 class Inv<T>
diff --git a/compiler/testData/diagnostics/tests/inference/commonSystem/selectIntegerValueTypeFromIf.kt b/compiler/testData/diagnostics/tests/inference/commonSystem/selectIntegerValueTypeFromIf.kt
index c29f64c1151..24829579b9c 100644
--- a/compiler/testData/diagnostics/tests/inference/commonSystem/selectIntegerValueTypeFromIf.kt
+++ b/compiler/testData/diagnostics/tests/inference/commonSystem/selectIntegerValueTypeFromIf.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 fun takeLong(i: Long) {}
diff --git a/compiler/testData/diagnostics/tests/inference/completion/anonymousFunction.fir.kt b/compiler/testData/diagnostics/tests/inference/completion/anonymousFunction.fir.kt
index c1442c34ddc..f1de8d30d5b 100644
--- a/compiler/testData/diagnostics/tests/inference/completion/anonymousFunction.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/completion/anonymousFunction.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 fun take(fn: () -> List<String>) {}
diff --git a/compiler/testData/diagnostics/tests/inference/completion/anonymousFunction.kt b/compiler/testData/diagnostics/tests/inference/completion/anonymousFunction.kt
index c3c97394c22..8e52f3af207 100644
--- a/compiler/testData/diagnostics/tests/inference/completion/anonymousFunction.kt
+++ b/compiler/testData/diagnostics/tests/inference/completion/anonymousFunction.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 fun take(fn: () -> List<String>) {}
diff --git a/compiler/testData/diagnostics/tests/inference/completion/basic.fir.kt b/compiler/testData/diagnostics/tests/inference/completion/basic.fir.kt
index 9a6e6faf539..67776a21332 100644
--- a/compiler/testData/diagnostics/tests/inference/completion/basic.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/completion/basic.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -UNUSED_PARAMETER
 
 interface Bound
diff --git a/compiler/testData/diagnostics/tests/inference/completion/basic.kt b/compiler/testData/diagnostics/tests/inference/completion/basic.kt
index 1202d01e319..3a7a0e4b68c 100644
--- a/compiler/testData/diagnostics/tests/inference/completion/basic.kt
+++ b/compiler/testData/diagnostics/tests/inference/completion/basic.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -UNUSED_PARAMETER
 
 interface Bound
diff --git a/compiler/testData/diagnostics/tests/inference/completion/definitelyNotNullType.fir.kt b/compiler/testData/diagnostics/tests/inference/completion/definitelyNotNullType.fir.kt
index 7b7d0461d29..39fcb08ed5c 100644
--- a/compiler/testData/diagnostics/tests/inference/completion/definitelyNotNullType.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/completion/definitelyNotNullType.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 fun <T : Derived?> test(derived: T) {
diff --git a/compiler/testData/diagnostics/tests/inference/completion/definitelyNotNullType.kt b/compiler/testData/diagnostics/tests/inference/completion/definitelyNotNullType.kt
index dfc3d225f0e..e8b19add909 100644
--- a/compiler/testData/diagnostics/tests/inference/completion/definitelyNotNullType.kt
+++ b/compiler/testData/diagnostics/tests/inference/completion/definitelyNotNullType.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 fun <T : Derived?> test(derived: T) {
diff --git a/compiler/testData/diagnostics/tests/inference/completion/equalityConstraintUpstairs.kt b/compiler/testData/diagnostics/tests/inference/completion/equalityConstraintUpstairs.kt
index 541021b7d45..3d25e769380 100644
--- a/compiler/testData/diagnostics/tests/inference/completion/equalityConstraintUpstairs.kt
+++ b/compiler/testData/diagnostics/tests/inference/completion/equalityConstraintUpstairs.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 class In<in I>(arg: I)
diff --git a/compiler/testData/diagnostics/tests/inference/completion/flexibleType.fir.kt b/compiler/testData/diagnostics/tests/inference/completion/flexibleType.fir.kt
index 868db4ac7ea..d46df81806e 100644
--- a/compiler/testData/diagnostics/tests/inference/completion/flexibleType.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/completion/flexibleType.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 // FILE: Test.kt
diff --git a/compiler/testData/diagnostics/tests/inference/completion/flexibleType.kt b/compiler/testData/diagnostics/tests/inference/completion/flexibleType.kt
index 42b595213d2..9e1ccb32817 100644
--- a/compiler/testData/diagnostics/tests/inference/completion/flexibleType.kt
+++ b/compiler/testData/diagnostics/tests/inference/completion/flexibleType.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 // FILE: Test.kt
diff --git a/compiler/testData/diagnostics/tests/inference/completion/intersectionType.fir.kt b/compiler/testData/diagnostics/tests/inference/completion/intersectionType.fir.kt
index b3d3927f06d..1acaf3e6391 100644
--- a/compiler/testData/diagnostics/tests/inference/completion/intersectionType.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/completion/intersectionType.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 fun test(a: D1, b: D2) {
diff --git a/compiler/testData/diagnostics/tests/inference/completion/intersectionType.kt b/compiler/testData/diagnostics/tests/inference/completion/intersectionType.kt
index 9c570ab1f93..199df357164 100644
--- a/compiler/testData/diagnostics/tests/inference/completion/intersectionType.kt
+++ b/compiler/testData/diagnostics/tests/inference/completion/intersectionType.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 fun test(a: D1, b: D2) {
diff --git a/compiler/testData/diagnostics/tests/inference/completion/kt33166.fir.kt b/compiler/testData/diagnostics/tests/inference/completion/kt33166.fir.kt
index f69d42f0902..7282a409805 100644
--- a/compiler/testData/diagnostics/tests/inference/completion/kt33166.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/completion/kt33166.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -UNUSED_PARAMETER
 
 // FILE: GenericRunnable.java
diff --git a/compiler/testData/diagnostics/tests/inference/completion/kt33166.kt b/compiler/testData/diagnostics/tests/inference/completion/kt33166.kt
index 8697bc4408a..c64ac4764a4 100644
--- a/compiler/testData/diagnostics/tests/inference/completion/kt33166.kt
+++ b/compiler/testData/diagnostics/tests/inference/completion/kt33166.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -UNUSED_PARAMETER
 
 // FILE: GenericRunnable.java
diff --git a/compiler/testData/diagnostics/tests/inference/completion/kt36233.kt b/compiler/testData/diagnostics/tests/inference/completion/kt36233.kt
index 40f0f8741e5..c0a01cd805b 100644
--- a/compiler/testData/diagnostics/tests/inference/completion/kt36233.kt
+++ b/compiler/testData/diagnostics/tests/inference/completion/kt36233.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -USELESS_CAST
 
 class Inv<T>
diff --git a/compiler/testData/diagnostics/tests/inference/completion/lambdaWithVariableAndNothing.fir.kt b/compiler/testData/diagnostics/tests/inference/completion/lambdaWithVariableAndNothing.fir.kt
index e9ddf1d9b6f..cd60f26dd45 100644
--- a/compiler/testData/diagnostics/tests/inference/completion/lambdaWithVariableAndNothing.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/completion/lambdaWithVariableAndNothing.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 fun <K> id(it: K) = it
diff --git a/compiler/testData/diagnostics/tests/inference/completion/lambdaWithVariableAndNothing.kt b/compiler/testData/diagnostics/tests/inference/completion/lambdaWithVariableAndNothing.kt
index 7fb87cda83c..25b915d72d4 100644
--- a/compiler/testData/diagnostics/tests/inference/completion/lambdaWithVariableAndNothing.kt
+++ b/compiler/testData/diagnostics/tests/inference/completion/lambdaWithVariableAndNothing.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 fun <K> id(it: K) = it
diff --git a/compiler/testData/diagnostics/tests/inference/completion/nestedVariance.fir.kt b/compiler/testData/diagnostics/tests/inference/completion/nestedVariance.fir.kt
index 903f7319022..cf768b28e79 100644
--- a/compiler/testData/diagnostics/tests/inference/completion/nestedVariance.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/completion/nestedVariance.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 interface Base
diff --git a/compiler/testData/diagnostics/tests/inference/completion/nestedVariance.kt b/compiler/testData/diagnostics/tests/inference/completion/nestedVariance.kt
index 3a65e39af07..d31d8ee1c7a 100644
--- a/compiler/testData/diagnostics/tests/inference/completion/nestedVariance.kt
+++ b/compiler/testData/diagnostics/tests/inference/completion/nestedVariance.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 interface Base
diff --git a/compiler/testData/diagnostics/tests/inference/completion/nothingFromNestedCall.fir.kt b/compiler/testData/diagnostics/tests/inference/completion/nothingFromNestedCall.fir.kt
index 2319bd65e03..5706689e46d 100644
--- a/compiler/testData/diagnostics/tests/inference/completion/nothingFromNestedCall.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/completion/nothingFromNestedCall.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !CHECK_TYPE
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNREACHABLE_CODE
 
diff --git a/compiler/testData/diagnostics/tests/inference/completion/nothingFromNestedCall.kt b/compiler/testData/diagnostics/tests/inference/completion/nothingFromNestedCall.kt
index 03268c239d7..afb06ceb4cc 100644
--- a/compiler/testData/diagnostics/tests/inference/completion/nothingFromNestedCall.kt
+++ b/compiler/testData/diagnostics/tests/inference/completion/nothingFromNestedCall.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !CHECK_TYPE
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNREACHABLE_CODE
 
diff --git a/compiler/testData/diagnostics/tests/inference/completion/partialForIlt.fir.kt b/compiler/testData/diagnostics/tests/inference/completion/partialForIlt.fir.kt
index 0308772d09d..a3368b3ebb2 100644
--- a/compiler/testData/diagnostics/tests/inference/completion/partialForIlt.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/completion/partialForIlt.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 fun takeByte(ilt: Byte) {}
diff --git a/compiler/testData/diagnostics/tests/inference/completion/partialForIlt.kt b/compiler/testData/diagnostics/tests/inference/completion/partialForIlt.kt
index d6d238bf7e8..432dd5339a5 100644
--- a/compiler/testData/diagnostics/tests/inference/completion/partialForIlt.kt
+++ b/compiler/testData/diagnostics/tests/inference/completion/partialForIlt.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 fun takeByte(ilt: Byte) {}
diff --git a/compiler/testData/diagnostics/tests/inference/completion/partialForIltWithNothing.fir.kt b/compiler/testData/diagnostics/tests/inference/completion/partialForIltWithNothing.fir.kt
index 4d2efdc6084..a17417cf6fe 100644
--- a/compiler/testData/diagnostics/tests/inference/completion/partialForIltWithNothing.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/completion/partialForIltWithNothing.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE
 
 fun test(boolean: Boolean) {
diff --git a/compiler/testData/diagnostics/tests/inference/completion/partialForIltWithNothing.kt b/compiler/testData/diagnostics/tests/inference/completion/partialForIltWithNothing.kt
index 16cabca67dd..e28fe874cd5 100644
--- a/compiler/testData/diagnostics/tests/inference/completion/partialForIltWithNothing.kt
+++ b/compiler/testData/diagnostics/tests/inference/completion/partialForIltWithNothing.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE
 
 fun test(boolean: Boolean) {
diff --git a/compiler/testData/diagnostics/tests/inference/completion/transitiveConstraint.kt b/compiler/testData/diagnostics/tests/inference/completion/transitiveConstraint.kt
index d6f643f55e8..567be2cc634 100644
--- a/compiler/testData/diagnostics/tests/inference/completion/transitiveConstraint.kt
+++ b/compiler/testData/diagnostics/tests/inference/completion/transitiveConstraint.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE
 
 interface Bound
diff --git a/compiler/testData/diagnostics/tests/inference/completion/withExact.fir.kt b/compiler/testData/diagnostics/tests/inference/completion/withExact.fir.kt
index c8e5dfb8245..9d65b583a8d 100644
--- a/compiler/testData/diagnostics/tests/inference/completion/withExact.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/completion/withExact.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 @file:Suppress("INVISIBLE_MEMBER", "INVISIBLE_REFERENCE")
diff --git a/compiler/testData/diagnostics/tests/inference/completion/withExact.kt b/compiler/testData/diagnostics/tests/inference/completion/withExact.kt
index 34e66140ba0..218d45c201b 100644
--- a/compiler/testData/diagnostics/tests/inference/completion/withExact.kt
+++ b/compiler/testData/diagnostics/tests/inference/completion/withExact.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 @file:Suppress("INVISIBLE_MEMBER", "INVISIBLE_REFERENCE")
diff --git a/compiler/testData/diagnostics/tests/inference/completionOfMultipleLambdas.fir.kt b/compiler/testData/diagnostics/tests/inference/completionOfMultipleLambdas.fir.kt
index 1eecea5eea4..adf163cbb57 100644
--- a/compiler/testData/diagnostics/tests/inference/completionOfMultipleLambdas.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/completionOfMultipleLambdas.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_ANONYMOUS_PARAMETER
 
 fun <K> select(x: K, y: K): K = x
diff --git a/compiler/testData/diagnostics/tests/inference/completionOfMultipleLambdas.kt b/compiler/testData/diagnostics/tests/inference/completionOfMultipleLambdas.kt
index 97d310dc5a7..821a0937e5f 100644
--- a/compiler/testData/diagnostics/tests/inference/completionOfMultipleLambdas.kt
+++ b/compiler/testData/diagnostics/tests/inference/completionOfMultipleLambdas.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_ANONYMOUS_PARAMETER
 
 fun <K> select(x: K, y: K): K = x
diff --git a/compiler/testData/diagnostics/tests/inference/constraints/approximationWithDefNotNullInInvPositionDuringInference.fir.kt b/compiler/testData/diagnostics/tests/inference/constraints/approximationWithDefNotNullInInvPositionDuringInference.fir.kt
index 25dd9342868..31a940da9e1 100644
--- a/compiler/testData/diagnostics/tests/inference/constraints/approximationWithDefNotNullInInvPositionDuringInference.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/constraints/approximationWithDefNotNullInInvPositionDuringInference.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // Issues: KT-36816
 
diff --git a/compiler/testData/diagnostics/tests/inference/constraints/approximationWithDefNotNullInInvPositionDuringInference.kt b/compiler/testData/diagnostics/tests/inference/constraints/approximationWithDefNotNullInInvPositionDuringInference.kt
index f8a28e8c942..254404ca9bc 100644
--- a/compiler/testData/diagnostics/tests/inference/constraints/approximationWithDefNotNullInInvPositionDuringInference.kt
+++ b/compiler/testData/diagnostics/tests/inference/constraints/approximationWithDefNotNullInInvPositionDuringInference.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // Issues: KT-36816
 
diff --git a/compiler/testData/diagnostics/tests/inference/constraints/complexDependencyWihtoutProperConstraints.fir.kt b/compiler/testData/diagnostics/tests/inference/constraints/complexDependencyWihtoutProperConstraints.fir.kt
index 5143e3323fb..117c61cbee3 100644
--- a/compiler/testData/diagnostics/tests/inference/constraints/complexDependencyWihtoutProperConstraints.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/constraints/complexDependencyWihtoutProperConstraints.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // Isuue: KT-37627
 
diff --git a/compiler/testData/diagnostics/tests/inference/constraints/complexDependencyWihtoutProperConstraints.kt b/compiler/testData/diagnostics/tests/inference/constraints/complexDependencyWihtoutProperConstraints.kt
index df2e5f71649..32513556da6 100644
--- a/compiler/testData/diagnostics/tests/inference/constraints/complexDependencyWihtoutProperConstraints.kt
+++ b/compiler/testData/diagnostics/tests/inference/constraints/complexDependencyWihtoutProperConstraints.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // Isuue: KT-37627
 
diff --git a/compiler/testData/diagnostics/tests/inference/constraints/errorUpperBoundConstraint.fir.kt b/compiler/testData/diagnostics/tests/inference/constraints/errorUpperBoundConstraint.fir.kt
index 14a79c461bd..611279cf803 100644
--- a/compiler/testData/diagnostics/tests/inference/constraints/errorUpperBoundConstraint.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/constraints/errorUpperBoundConstraint.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 
 // FILE: Sam.java
 
diff --git a/compiler/testData/diagnostics/tests/inference/constraints/errorUpperBoundConstraint.kt b/compiler/testData/diagnostics/tests/inference/constraints/errorUpperBoundConstraint.kt
index 187422bdd1c..850bf57221a 100644
--- a/compiler/testData/diagnostics/tests/inference/constraints/errorUpperBoundConstraint.kt
+++ b/compiler/testData/diagnostics/tests/inference/constraints/errorUpperBoundConstraint.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 
 // FILE: Sam.java
 
diff --git a/compiler/testData/diagnostics/tests/inference/constraints/recursiveJavaTypeWithStarProjection.kt b/compiler/testData/diagnostics/tests/inference/constraints/recursiveJavaTypeWithStarProjection.kt
index 48bbfd720a7..188f1886e61 100644
--- a/compiler/testData/diagnostics/tests/inference/constraints/recursiveJavaTypeWithStarProjection.kt
+++ b/compiler/testData/diagnostics/tests/inference/constraints/recursiveJavaTypeWithStarProjection.kt
@@ -1,6 +1,5 @@
 // FIR_IDENTICAL
 // !DIAGNOSTICS: -UNUSED_VARIABLE
-// !LANGUAGE: +NewInference
 
 // FILE: MenuItemBase.java
 
diff --git a/compiler/testData/diagnostics/tests/inference/constraints/remainConstraintContainingTypeWithoutProjection.kt b/compiler/testData/diagnostics/tests/inference/constraints/remainConstraintContainingTypeWithoutProjection.kt
index bfba4375374..6f486911ee7 100644
--- a/compiler/testData/diagnostics/tests/inference/constraints/remainConstraintContainingTypeWithoutProjection.kt
+++ b/compiler/testData/diagnostics/tests/inference/constraints/remainConstraintContainingTypeWithoutProjection.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -CAST_NEVER_SUCCEEDS
 // SKIP_TXT
 
diff --git a/compiler/testData/diagnostics/tests/inference/cstFromErrorAndNonErrorTypes.fir.kt b/compiler/testData/diagnostics/tests/inference/cstFromErrorAndNonErrorTypes.fir.kt
index 3b8aeada1f2..3eccd7ad7b6 100644
--- a/compiler/testData/diagnostics/tests/inference/cstFromErrorAndNonErrorTypes.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/cstFromErrorAndNonErrorTypes.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 
 fun test() {
     run {
diff --git a/compiler/testData/diagnostics/tests/inference/cstFromErrorAndNonErrorTypes.kt b/compiler/testData/diagnostics/tests/inference/cstFromErrorAndNonErrorTypes.kt
index 3a24c8d73e4..67746e5476c 100644
--- a/compiler/testData/diagnostics/tests/inference/cstFromErrorAndNonErrorTypes.kt
+++ b/compiler/testData/diagnostics/tests/inference/cstFromErrorAndNonErrorTypes.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 
 fun test() {
     run {
diff --git a/compiler/testData/diagnostics/tests/inference/emptyIntersectionTypes/selectFromCovariantAndContravariantTypes.fir.kt b/compiler/testData/diagnostics/tests/inference/emptyIntersectionTypes/selectFromCovariantAndContravariantTypes.fir.kt
index ffdca6183e1..e89c4386f64 100644
--- a/compiler/testData/diagnostics/tests/inference/emptyIntersectionTypes/selectFromCovariantAndContravariantTypes.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/emptyIntersectionTypes/selectFromCovariantAndContravariantTypes.fir.kt
@@ -1,5 +1,4 @@
 // RENDER_DIAGNOSTICS_FULL_TEXT
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 class In<in T>
diff --git a/compiler/testData/diagnostics/tests/inference/emptyIntersectionTypes/selectFromCovariantAndContravariantTypes.kt b/compiler/testData/diagnostics/tests/inference/emptyIntersectionTypes/selectFromCovariantAndContravariantTypes.kt
index 1752417dc17..3be8a519d2d 100644
--- a/compiler/testData/diagnostics/tests/inference/emptyIntersectionTypes/selectFromCovariantAndContravariantTypes.kt
+++ b/compiler/testData/diagnostics/tests/inference/emptyIntersectionTypes/selectFromCovariantAndContravariantTypes.kt
@@ -1,5 +1,4 @@
 // RENDER_DIAGNOSTICS_FULL_TEXT
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 class In<in T>
diff --git a/compiler/testData/diagnostics/tests/inference/intersectionWithEnum.kt b/compiler/testData/diagnostics/tests/inference/intersectionWithEnum.kt
index cee9711f80c..63c0b5d86e0 100644
--- a/compiler/testData/diagnostics/tests/inference/intersectionWithEnum.kt
+++ b/compiler/testData/diagnostics/tests/inference/intersectionWithEnum.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE
 // NI_EXPECTED_FILE
 
diff --git a/compiler/testData/diagnostics/tests/inference/knownTypeParameters.kt b/compiler/testData/diagnostics/tests/inference/knownTypeParameters.kt
index 7fb8f4d7ac1..9628276a47c 100644
--- a/compiler/testData/diagnostics/tests/inference/knownTypeParameters.kt
+++ b/compiler/testData/diagnostics/tests/inference/knownTypeParameters.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 
 open class A<T1, T2> {
     open inner class A1(val a1: T1)
diff --git a/compiler/testData/diagnostics/tests/inference/kt32415.kt b/compiler/testData/diagnostics/tests/inference/kt32415.kt
index 8aee99fda2d..a20efab5e40 100644
--- a/compiler/testData/diagnostics/tests/inference/kt32415.kt
+++ b/compiler/testData/diagnostics/tests/inference/kt32415.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 
 abstract class TestType<V: Any> {
     open inner class Inner(val item: V)
diff --git a/compiler/testData/diagnostics/tests/inference/kt32462.fir.kt b/compiler/testData/diagnostics/tests/inference/kt32462.fir.kt
index 64284609ab5..8928b50214e 100644
--- a/compiler/testData/diagnostics/tests/inference/kt32462.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/kt32462.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // ISSUE: KT-32462
 
diff --git a/compiler/testData/diagnostics/tests/inference/kt32462.kt b/compiler/testData/diagnostics/tests/inference/kt32462.kt
index 52f9f9a5a4d..15af838f2ba 100644
--- a/compiler/testData/diagnostics/tests/inference/kt32462.kt
+++ b/compiler/testData/diagnostics/tests/inference/kt32462.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // ISSUE: KT-32462
 
diff --git a/compiler/testData/diagnostics/tests/inference/kt33263.fir.kt b/compiler/testData/diagnostics/tests/inference/kt33263.fir.kt
index e68ffdd3d02..98879b04481 100644
--- a/compiler/testData/diagnostics/tests/inference/kt33263.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/kt33263.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // ISSUE: KT-33263
 
diff --git a/compiler/testData/diagnostics/tests/inference/kt33263.kt b/compiler/testData/diagnostics/tests/inference/kt33263.kt
index 29843559173..9381198a5bf 100644
--- a/compiler/testData/diagnostics/tests/inference/kt33263.kt
+++ b/compiler/testData/diagnostics/tests/inference/kt33263.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // ISSUE: KT-33263
 
diff --git a/compiler/testData/diagnostics/tests/inference/kt35702.kt b/compiler/testData/diagnostics/tests/inference/kt35702.kt
index 5615830e9ef..3552d7e2b1a 100644
--- a/compiler/testData/diagnostics/tests/inference/kt35702.kt
+++ b/compiler/testData/diagnostics/tests/inference/kt35702.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNCHECKED_CAST -UNUSED_VARIABLE -UNUSED_ANONYMOUS_PARAMETER -UNUSED_PARAMETER
 // ISSUE: KT-35702
 
diff --git a/compiler/testData/diagnostics/tests/inference/kt36819.kt b/compiler/testData/diagnostics/tests/inference/kt36819.kt
index 982d2cb4ce1..b915b9275c6 100644
--- a/compiler/testData/diagnostics/tests/inference/kt36819.kt
+++ b/compiler/testData/diagnostics/tests/inference/kt36819.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_ANONYMOUS_PARAMETER -CAST_NEVER_SUCCEEDS
 // ISSUE: KT-36819
 
diff --git a/compiler/testData/diagnostics/tests/inference/lambdaArgumentWithLabel.kt b/compiler/testData/diagnostics/tests/inference/lambdaArgumentWithLabel.kt
index 6629fa2cfea..5ab9f6fc2a1 100644
--- a/compiler/testData/diagnostics/tests/inference/lambdaArgumentWithLabel.kt
+++ b/compiler/testData/diagnostics/tests/inference/lambdaArgumentWithLabel.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 val x1: (String) -> Unit = run {
diff --git a/compiler/testData/diagnostics/tests/inference/localFunctionInsideIfBlock.kt b/compiler/testData/diagnostics/tests/inference/localFunctionInsideIfBlock.kt
index 2e5c0a83540..0f529e6d926 100644
--- a/compiler/testData/diagnostics/tests/inference/localFunctionInsideIfBlock.kt
+++ b/compiler/testData/diagnostics/tests/inference/localFunctionInsideIfBlock.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 
 fun bar() {
     if (true) {
diff --git a/compiler/testData/diagnostics/tests/inference/nestedCalls/preferArgumentToNullability.kt b/compiler/testData/diagnostics/tests/inference/nestedCalls/preferArgumentToNullability.kt
index 0900a74086b..1cc457c26e2 100644
--- a/compiler/testData/diagnostics/tests/inference/nestedCalls/preferArgumentToNullability.kt
+++ b/compiler/testData/diagnostics/tests/inference/nestedCalls/preferArgumentToNullability.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 open class Cls
diff --git a/compiler/testData/diagnostics/tests/inference/nothingType/complexDependancyOnVariableWithTrivialConstraint.kt b/compiler/testData/diagnostics/tests/inference/nothingType/complexDependancyOnVariableWithTrivialConstraint.kt
index 639979c2b30..6f10116eea8 100644
--- a/compiler/testData/diagnostics/tests/inference/nothingType/complexDependancyOnVariableWithTrivialConstraint.kt
+++ b/compiler/testData/diagnostics/tests/inference/nothingType/complexDependancyOnVariableWithTrivialConstraint.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 // Validation test.
diff --git a/compiler/testData/diagnostics/tests/inference/nothingType/discriminateNothingForReifiedParameter.fir.kt b/compiler/testData/diagnostics/tests/inference/nothingType/discriminateNothingForReifiedParameter.fir.kt
index a89d4fac033..ca9f7b70bf6 100644
--- a/compiler/testData/diagnostics/tests/inference/nothingType/discriminateNothingForReifiedParameter.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/nothingType/discriminateNothingForReifiedParameter.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNREACHABLE_CODE
 
 interface Bound
diff --git a/compiler/testData/diagnostics/tests/inference/nothingType/discriminateNothingForReifiedParameter.kt b/compiler/testData/diagnostics/tests/inference/nothingType/discriminateNothingForReifiedParameter.kt
index f36a1ec8659..d290da3d046 100644
--- a/compiler/testData/diagnostics/tests/inference/nothingType/discriminateNothingForReifiedParameter.kt
+++ b/compiler/testData/diagnostics/tests/inference/nothingType/discriminateNothingForReifiedParameter.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNREACHABLE_CODE
 
 interface Bound
diff --git a/compiler/testData/diagnostics/tests/inference/nothingType/discriminatedNothingAndSmartCast.fir.kt b/compiler/testData/diagnostics/tests/inference/nothingType/discriminatedNothingAndSmartCast.fir.kt
index 7d4688e80cc..beea6b9f6dd 100644
--- a/compiler/testData/diagnostics/tests/inference/nothingType/discriminatedNothingAndSmartCast.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/nothingType/discriminatedNothingAndSmartCast.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE
 
 interface ExpectedType
diff --git a/compiler/testData/diagnostics/tests/inference/nothingType/discriminatedNothingAndSmartCast.kt b/compiler/testData/diagnostics/tests/inference/nothingType/discriminatedNothingAndSmartCast.kt
index 6eb9f178a36..87c4f14864c 100644
--- a/compiler/testData/diagnostics/tests/inference/nothingType/discriminatedNothingAndSmartCast.kt
+++ b/compiler/testData/diagnostics/tests/inference/nothingType/discriminatedNothingAndSmartCast.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE
 
 interface ExpectedType
diff --git a/compiler/testData/diagnostics/tests/inference/nothingType/discriminatedNothingInsideComplexNestedCall.kt b/compiler/testData/diagnostics/tests/inference/nothingType/discriminatedNothingInsideComplexNestedCall.kt
index 9eccd5e978d..dc5f3bb6a9a 100644
--- a/compiler/testData/diagnostics/tests/inference/nothingType/discriminatedNothingInsideComplexNestedCall.kt
+++ b/compiler/testData/diagnostics/tests/inference/nothingType/discriminatedNothingInsideComplexNestedCall.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 fun expanded(maxCapacity: Int, newCapacity: Int, buffer: Array<Any?>) {
diff --git a/compiler/testData/diagnostics/tests/inference/nothingType/generateConstraintWithInnerNothingType.kt b/compiler/testData/diagnostics/tests/inference/nothingType/generateConstraintWithInnerNothingType.kt
index fbec8762b5b..e78d4a14646 100644
--- a/compiler/testData/diagnostics/tests/inference/nothingType/generateConstraintWithInnerNothingType.kt
+++ b/compiler/testData/diagnostics/tests/inference/nothingType/generateConstraintWithInnerNothingType.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 class Out<out T>(val o: T)
diff --git a/compiler/testData/diagnostics/tests/inference/nothingType/implicitInferenceTToFlexibleNothing.fir.kt b/compiler/testData/diagnostics/tests/inference/nothingType/implicitInferenceTToFlexibleNothing.fir.kt
index 629ba139ae2..2197a63a8b8 100644
--- a/compiler/testData/diagnostics/tests/inference/nothingType/implicitInferenceTToFlexibleNothing.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/nothingType/implicitInferenceTToFlexibleNothing.fir.kt
@@ -1,5 +1,4 @@
 // !DIAGNOSTICS: -UNUSED_VARIABLE -UNCHECKED_CAST -UNUSED_PARAMETER
-// !LANGUAGE: +NewInference
 // SKIP_TXT
 
 import java.util.*
diff --git a/compiler/testData/diagnostics/tests/inference/nothingType/implicitInferenceTToFlexibleNothing.kt b/compiler/testData/diagnostics/tests/inference/nothingType/implicitInferenceTToFlexibleNothing.kt
index 9a8ec6c3e18..d296739f3cc 100644
--- a/compiler/testData/diagnostics/tests/inference/nothingType/implicitInferenceTToFlexibleNothing.kt
+++ b/compiler/testData/diagnostics/tests/inference/nothingType/implicitInferenceTToFlexibleNothing.kt
@@ -1,5 +1,4 @@
 // !DIAGNOSTICS: -UNUSED_VARIABLE -UNCHECKED_CAST -UNUSED_PARAMETER
-// !LANGUAGE: +NewInference
 // SKIP_TXT
 
 import java.util.*
diff --git a/compiler/testData/diagnostics/tests/inference/nothingType/implicitNothingConstraintFromReturn.kt b/compiler/testData/diagnostics/tests/inference/nothingType/implicitNothingConstraintFromReturn.kt
index b4f9d308366..32c932d2c70 100644
--- a/compiler/testData/diagnostics/tests/inference/nothingType/implicitNothingConstraintFromReturn.kt
+++ b/compiler/testData/diagnostics/tests/inference/nothingType/implicitNothingConstraintFromReturn.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 class Simple
diff --git a/compiler/testData/diagnostics/tests/inference/nothingType/kt24490.kt b/compiler/testData/diagnostics/tests/inference/nothingType/kt24490.kt
index 9a85359b669..c3772e9386b 100644
--- a/compiler/testData/diagnostics/tests/inference/nothingType/kt24490.kt
+++ b/compiler/testData/diagnostics/tests/inference/nothingType/kt24490.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE
 
 fun <T> bar(i: T): T = i
diff --git a/compiler/testData/diagnostics/tests/inference/nothingType/kt34335.fir.kt b/compiler/testData/diagnostics/tests/inference/nothingType/kt34335.fir.kt
index 0b28939d4ac..0feb52c1e13 100644
--- a/compiler/testData/diagnostics/tests/inference/nothingType/kt34335.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/nothingType/kt34335.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 fun call(vararg x: Any?) {}
diff --git a/compiler/testData/diagnostics/tests/inference/nothingType/kt34335.kt b/compiler/testData/diagnostics/tests/inference/nothingType/kt34335.kt
index a9d5e97bb09..6b215a320fc 100644
--- a/compiler/testData/diagnostics/tests/inference/nothingType/kt34335.kt
+++ b/compiler/testData/diagnostics/tests/inference/nothingType/kt34335.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 fun call(vararg x: Any?) {}
diff --git a/compiler/testData/diagnostics/tests/inference/nothingType/nestedLambdaInferenceWithIncorporationOfVariables.kt b/compiler/testData/diagnostics/tests/inference/nothingType/nestedLambdaInferenceWithIncorporationOfVariables.kt
index b97d40f3bd8..9cc1784f7ba 100644
--- a/compiler/testData/diagnostics/tests/inference/nothingType/nestedLambdaInferenceWithIncorporationOfVariables.kt
+++ b/compiler/testData/diagnostics/tests/inference/nothingType/nestedLambdaInferenceWithIncorporationOfVariables.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 
 fun <K> id1(k: K): K = k
 fun <V> id2(v: V): V = v
diff --git a/compiler/testData/diagnostics/tests/inference/nothingType/notEnoughInformationAndNothing.fir.kt b/compiler/testData/diagnostics/tests/inference/nothingType/notEnoughInformationAndNothing.fir.kt
index 51509e7a3d0..2c1d9e280bb 100644
--- a/compiler/testData/diagnostics/tests/inference/nothingType/notEnoughInformationAndNothing.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/nothingType/notEnoughInformationAndNothing.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -UNUSED_PARAMETER
 // !CHECK_TYPE
 
diff --git a/compiler/testData/diagnostics/tests/inference/nothingType/notEnoughInformationAndNothing.kt b/compiler/testData/diagnostics/tests/inference/nothingType/notEnoughInformationAndNothing.kt
index 33edd7a1e1f..33033ff3325 100644
--- a/compiler/testData/diagnostics/tests/inference/nothingType/notEnoughInformationAndNothing.kt
+++ b/compiler/testData/diagnostics/tests/inference/nothingType/notEnoughInformationAndNothing.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -UNUSED_PARAMETER
 // !CHECK_TYPE
 
diff --git a/compiler/testData/diagnostics/tests/inference/nothingType/nothingWithCallableReference.kt b/compiler/testData/diagnostics/tests/inference/nothingType/nothingWithCallableReference.kt
index ba22299a9ed..e330f5c1ceb 100644
--- a/compiler/testData/diagnostics/tests/inference/nothingType/nothingWithCallableReference.kt
+++ b/compiler/testData/diagnostics/tests/inference/nothingType/nothingWithCallableReference.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 fun <K> select2(x: K, y: K): K = TODO()
diff --git a/compiler/testData/diagnostics/tests/inference/nothingType/nullableExpectedTypeFromVariable.fir.kt b/compiler/testData/diagnostics/tests/inference/nothingType/nullableExpectedTypeFromVariable.fir.kt
index 1b4d944c9dd..9906e6ebf3b 100644
--- a/compiler/testData/diagnostics/tests/inference/nothingType/nullableExpectedTypeFromVariable.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/nothingType/nullableExpectedTypeFromVariable.fir.kt
@@ -1,5 +1,4 @@
 // !DIAGNOSTICS: -UNUSED_PARAMETER
-// !LANGUAGE: +NewInference
 // WITH_STDLIB
 
 class Foo<T> {
diff --git a/compiler/testData/diagnostics/tests/inference/nothingType/nullableExpectedTypeFromVariable.kt b/compiler/testData/diagnostics/tests/inference/nothingType/nullableExpectedTypeFromVariable.kt
index 5b7899c6a4d..b20a41b0ef8 100644
--- a/compiler/testData/diagnostics/tests/inference/nothingType/nullableExpectedTypeFromVariable.kt
+++ b/compiler/testData/diagnostics/tests/inference/nothingType/nullableExpectedTypeFromVariable.kt
@@ -1,5 +1,4 @@
 // !DIAGNOSTICS: -UNUSED_PARAMETER
-// !LANGUAGE: +NewInference
 // WITH_STDLIB
 
 class Foo<T> {
diff --git a/compiler/testData/diagnostics/tests/inference/nothingType/platformNothingAsUsefulConstraint.fir.kt b/compiler/testData/diagnostics/tests/inference/nothingType/platformNothingAsUsefulConstraint.fir.kt
index caa0b712e6a..55662bcc8b1 100644
--- a/compiler/testData/diagnostics/tests/inference/nothingType/platformNothingAsUsefulConstraint.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/nothingType/platformNothingAsUsefulConstraint.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE
 
 // FILE: Tasks.java
diff --git a/compiler/testData/diagnostics/tests/inference/nothingType/platformNothingAsUsefulConstraint.kt b/compiler/testData/diagnostics/tests/inference/nothingType/platformNothingAsUsefulConstraint.kt
index 2c7c30c4ff6..1067b8a74d6 100644
--- a/compiler/testData/diagnostics/tests/inference/nothingType/platformNothingAsUsefulConstraint.kt
+++ b/compiler/testData/diagnostics/tests/inference/nothingType/platformNothingAsUsefulConstraint.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE
 
 // FILE: Tasks.java
diff --git a/compiler/testData/diagnostics/tests/inference/nothingType/reifiedParameterWithRecursiveBound.fir.kt b/compiler/testData/diagnostics/tests/inference/nothingType/reifiedParameterWithRecursiveBound.fir.kt
index 02289316e2a..5cab6b40c44 100644
--- a/compiler/testData/diagnostics/tests/inference/nothingType/reifiedParameterWithRecursiveBound.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/nothingType/reifiedParameterWithRecursiveBound.fir.kt
@@ -1,5 +1,4 @@
 // Issue: KT-37621
-// !LANGUAGE: +NewInference
 
 class Inv<T>
 class In<in I>
diff --git a/compiler/testData/diagnostics/tests/inference/nothingType/reifiedParameterWithRecursiveBound.kt b/compiler/testData/diagnostics/tests/inference/nothingType/reifiedParameterWithRecursiveBound.kt
index a96c94f4640..032f3e27e63 100644
--- a/compiler/testData/diagnostics/tests/inference/nothingType/reifiedParameterWithRecursiveBound.kt
+++ b/compiler/testData/diagnostics/tests/inference/nothingType/reifiedParameterWithRecursiveBound.kt
@@ -1,5 +1,4 @@
 // Issue: KT-37621
-// !LANGUAGE: +NewInference
 
 class Inv<T>
 class In<in I>
diff --git a/compiler/testData/diagnostics/tests/inference/nothingType/specialCallWithMaterializeAndExpectedType.fir.kt b/compiler/testData/diagnostics/tests/inference/nothingType/specialCallWithMaterializeAndExpectedType.fir.kt
index ab914441da3..9a6d6b72fc1 100644
--- a/compiler/testData/diagnostics/tests/inference/nothingType/specialCallWithMaterializeAndExpectedType.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/nothingType/specialCallWithMaterializeAndExpectedType.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE
 
 fun foo() {
diff --git a/compiler/testData/diagnostics/tests/inference/nothingType/specialCallWithMaterializeAndExpectedType.kt b/compiler/testData/diagnostics/tests/inference/nothingType/specialCallWithMaterializeAndExpectedType.kt
index a038ae71a58..e52674c522d 100644
--- a/compiler/testData/diagnostics/tests/inference/nothingType/specialCallWithMaterializeAndExpectedType.kt
+++ b/compiler/testData/diagnostics/tests/inference/nothingType/specialCallWithMaterializeAndExpectedType.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE
 
 fun foo() {
diff --git a/compiler/testData/diagnostics/tests/inference/publicApproximation/approximatedIntersectionMorePreciseThanBound.kt b/compiler/testData/diagnostics/tests/inference/publicApproximation/approximatedIntersectionMorePreciseThanBound.kt
index 0bec3ef6b20..f19a182ac5b 100644
--- a/compiler/testData/diagnostics/tests/inference/publicApproximation/approximatedIntersectionMorePreciseThanBound.kt
+++ b/compiler/testData/diagnostics/tests/inference/publicApproximation/approximatedIntersectionMorePreciseThanBound.kt
@@ -1,6 +1,5 @@
 // FIR_IDENTICAL
 // !DIAGNOSTICS: -UNUSED_PARAMETER
-// !LANGUAGE: +NewInference
 
 interface Bound {
     fun foo() {}
diff --git a/compiler/testData/diagnostics/tests/inference/publicApproximation/declarationTypes.fir.kt b/compiler/testData/diagnostics/tests/inference/publicApproximation/declarationTypes.fir.kt
index e177d28b10c..0e0bab35702 100644
--- a/compiler/testData/diagnostics/tests/inference/publicApproximation/declarationTypes.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/publicApproximation/declarationTypes.fir.kt
@@ -1,5 +1,4 @@
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_EXPRESSION
-// !LANGUAGE: +NewInference
 
 interface Bound1
 interface Bound2 
diff --git a/compiler/testData/diagnostics/tests/inference/publicApproximation/declarationTypes.kt b/compiler/testData/diagnostics/tests/inference/publicApproximation/declarationTypes.kt
index 219aa252e46..e1df7558292 100644
--- a/compiler/testData/diagnostics/tests/inference/publicApproximation/declarationTypes.kt
+++ b/compiler/testData/diagnostics/tests/inference/publicApproximation/declarationTypes.kt
@@ -1,5 +1,4 @@
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_EXPRESSION
-// !LANGUAGE: +NewInference
 
 interface Bound1
 interface Bound2 
diff --git a/compiler/testData/diagnostics/tests/inference/publicApproximation/intersectionAlternative.fir.kt b/compiler/testData/diagnostics/tests/inference/publicApproximation/intersectionAlternative.fir.kt
index f138ece7b9b..4845f7f06e1 100644
--- a/compiler/testData/diagnostics/tests/inference/publicApproximation/intersectionAlternative.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/publicApproximation/intersectionAlternative.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 interface Bound
diff --git a/compiler/testData/diagnostics/tests/inference/publicApproximation/intersectionAlternative.kt b/compiler/testData/diagnostics/tests/inference/publicApproximation/intersectionAlternative.kt
index 3ff937e8d2f..0c7701c1649 100644
--- a/compiler/testData/diagnostics/tests/inference/publicApproximation/intersectionAlternative.kt
+++ b/compiler/testData/diagnostics/tests/inference/publicApproximation/intersectionAlternative.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 interface Bound
diff --git a/compiler/testData/diagnostics/tests/inference/publicApproximation/intersectionLocations.fir.kt b/compiler/testData/diagnostics/tests/inference/publicApproximation/intersectionLocations.fir.kt
index 1ab84ed60cf..076b3032060 100644
--- a/compiler/testData/diagnostics/tests/inference/publicApproximation/intersectionLocations.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/publicApproximation/intersectionLocations.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 fun test() {
diff --git a/compiler/testData/diagnostics/tests/inference/publicApproximation/intersectionLocations.kt b/compiler/testData/diagnostics/tests/inference/publicApproximation/intersectionLocations.kt
index ea754ea3174..0ba54326c24 100644
--- a/compiler/testData/diagnostics/tests/inference/publicApproximation/intersectionLocations.kt
+++ b/compiler/testData/diagnostics/tests/inference/publicApproximation/intersectionLocations.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 fun test() {
diff --git a/compiler/testData/diagnostics/tests/inference/publicApproximation/lambdaReturnTypeApproximation.fir.kt b/compiler/testData/diagnostics/tests/inference/publicApproximation/lambdaReturnTypeApproximation.fir.kt
index 880560d6886..0d5de6858e6 100644
--- a/compiler/testData/diagnostics/tests/inference/publicApproximation/lambdaReturnTypeApproximation.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/publicApproximation/lambdaReturnTypeApproximation.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 interface Bound1
diff --git a/compiler/testData/diagnostics/tests/inference/publicApproximation/lambdaReturnTypeApproximation.kt b/compiler/testData/diagnostics/tests/inference/publicApproximation/lambdaReturnTypeApproximation.kt
index 5f0119c0aca..1afeb3485af 100644
--- a/compiler/testData/diagnostics/tests/inference/publicApproximation/lambdaReturnTypeApproximation.kt
+++ b/compiler/testData/diagnostics/tests/inference/publicApproximation/lambdaReturnTypeApproximation.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 interface Bound1
diff --git a/compiler/testData/diagnostics/tests/inference/publicApproximation/parameterInBound.fir.kt b/compiler/testData/diagnostics/tests/inference/publicApproximation/parameterInBound.fir.kt
index b07f41e784e..f994dbca25b 100644
--- a/compiler/testData/diagnostics/tests/inference/publicApproximation/parameterInBound.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/publicApproximation/parameterInBound.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 interface Bound1
diff --git a/compiler/testData/diagnostics/tests/inference/publicApproximation/parameterInBound.kt b/compiler/testData/diagnostics/tests/inference/publicApproximation/parameterInBound.kt
index 8f18cb6376f..459440b28c5 100644
--- a/compiler/testData/diagnostics/tests/inference/publicApproximation/parameterInBound.kt
+++ b/compiler/testData/diagnostics/tests/inference/publicApproximation/parameterInBound.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 interface Bound1
diff --git a/compiler/testData/diagnostics/tests/inference/recursiveTypes/multirecursion.fir.kt b/compiler/testData/diagnostics/tests/inference/recursiveTypes/multirecursion.fir.kt
index ef8999183f0..8fbdc0a3b91 100644
--- a/compiler/testData/diagnostics/tests/inference/recursiveTypes/multirecursion.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/recursiveTypes/multirecursion.fir.kt
@@ -1,5 +1,4 @@
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_EXPRESSION
-// !LANGUAGE: +NewInference
 
 interface I1<A : I1<A>>
 interface I2<C : I2<C>>
diff --git a/compiler/testData/diagnostics/tests/inference/recursiveTypes/multirecursion.kt b/compiler/testData/diagnostics/tests/inference/recursiveTypes/multirecursion.kt
index d17bcac6064..00f873632b9 100644
--- a/compiler/testData/diagnostics/tests/inference/recursiveTypes/multirecursion.kt
+++ b/compiler/testData/diagnostics/tests/inference/recursiveTypes/multirecursion.kt
@@ -1,5 +1,4 @@
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_EXPRESSION
-// !LANGUAGE: +NewInference
 
 interface I1<A : I1<A>>
 interface I2<C : I2<C>>
diff --git a/compiler/testData/diagnostics/tests/inference/recursiveTypes/recursiveInIn.fir.kt b/compiler/testData/diagnostics/tests/inference/recursiveTypes/recursiveInIn.fir.kt
index 2ef2e82a797..60449506a79 100644
--- a/compiler/testData/diagnostics/tests/inference/recursiveTypes/recursiveInIn.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/recursiveTypes/recursiveInIn.fir.kt
@@ -1,5 +1,4 @@
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_EXPRESSION
-// !LANGUAGE: +NewInference
 
 interface Rec<in A: Rec<A, B>, in B>
 
diff --git a/compiler/testData/diagnostics/tests/inference/recursiveTypes/recursiveInIn.kt b/compiler/testData/diagnostics/tests/inference/recursiveTypes/recursiveInIn.kt
index 10d8e59bb06..4053482d095 100644
--- a/compiler/testData/diagnostics/tests/inference/recursiveTypes/recursiveInIn.kt
+++ b/compiler/testData/diagnostics/tests/inference/recursiveTypes/recursiveInIn.kt
@@ -1,5 +1,4 @@
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_EXPRESSION
-// !LANGUAGE: +NewInference
 
 interface Rec<in A: Rec<A, B>, in B>
 
diff --git a/compiler/testData/diagnostics/tests/inference/recursiveTypes/recursiveInInv.fir.kt b/compiler/testData/diagnostics/tests/inference/recursiveTypes/recursiveInInv.fir.kt
index 5b2e2eb0069..0e46fdd34ce 100644
--- a/compiler/testData/diagnostics/tests/inference/recursiveTypes/recursiveInInv.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/recursiveTypes/recursiveInInv.fir.kt
@@ -1,5 +1,4 @@
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_EXPRESSION
-// !LANGUAGE: +NewInference
 
 interface Rec<in A: Rec<A, B>, B>
 
diff --git a/compiler/testData/diagnostics/tests/inference/recursiveTypes/recursiveInInv.kt b/compiler/testData/diagnostics/tests/inference/recursiveTypes/recursiveInInv.kt
index f1daaa2a3b1..ab1a3a88721 100644
--- a/compiler/testData/diagnostics/tests/inference/recursiveTypes/recursiveInInv.kt
+++ b/compiler/testData/diagnostics/tests/inference/recursiveTypes/recursiveInInv.kt
@@ -1,5 +1,4 @@
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_EXPRESSION
-// !LANGUAGE: +NewInference
 
 interface Rec<in A: Rec<A, B>, B>
 
diff --git a/compiler/testData/diagnostics/tests/inference/recursiveTypes/recursiveInOut.fir.kt b/compiler/testData/diagnostics/tests/inference/recursiveTypes/recursiveInOut.fir.kt
index 7055b967bf7..feddd0cba84 100644
--- a/compiler/testData/diagnostics/tests/inference/recursiveTypes/recursiveInOut.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/recursiveTypes/recursiveInOut.fir.kt
@@ -1,5 +1,4 @@
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_EXPRESSION
-// !LANGUAGE: +NewInference
 
 interface Rec<in A: Rec<A, B>, out B>
 
diff --git a/compiler/testData/diagnostics/tests/inference/recursiveTypes/recursiveInOut.kt b/compiler/testData/diagnostics/tests/inference/recursiveTypes/recursiveInOut.kt
index 6988369235b..de5fc37107b 100644
--- a/compiler/testData/diagnostics/tests/inference/recursiveTypes/recursiveInOut.kt
+++ b/compiler/testData/diagnostics/tests/inference/recursiveTypes/recursiveInOut.kt
@@ -1,5 +1,4 @@
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_EXPRESSION
-// !LANGUAGE: +NewInference
 
 interface Rec<in A: Rec<A, B>, out B>
 
diff --git a/compiler/testData/diagnostics/tests/inference/recursiveTypes/recursiveInvIn.fir.kt b/compiler/testData/diagnostics/tests/inference/recursiveTypes/recursiveInvIn.fir.kt
index 95639d3df71..2c7e3066545 100644
--- a/compiler/testData/diagnostics/tests/inference/recursiveTypes/recursiveInvIn.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/recursiveTypes/recursiveInvIn.fir.kt
@@ -1,5 +1,4 @@
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_EXPRESSION
-// !LANGUAGE: +NewInference
 
 interface Rec<A: Rec<A, B>, in B>
 
diff --git a/compiler/testData/diagnostics/tests/inference/recursiveTypes/recursiveInvIn.kt b/compiler/testData/diagnostics/tests/inference/recursiveTypes/recursiveInvIn.kt
index 83d60a02f60..5014f66c41b 100644
--- a/compiler/testData/diagnostics/tests/inference/recursiveTypes/recursiveInvIn.kt
+++ b/compiler/testData/diagnostics/tests/inference/recursiveTypes/recursiveInvIn.kt
@@ -1,5 +1,4 @@
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_EXPRESSION
-// !LANGUAGE: +NewInference
 
 interface Rec<A: Rec<A, B>, in B>
 
diff --git a/compiler/testData/diagnostics/tests/inference/recursiveTypes/recursiveOutIn.fir.kt b/compiler/testData/diagnostics/tests/inference/recursiveTypes/recursiveOutIn.fir.kt
index 5546e0c9b9d..0f82b8e8871 100644
--- a/compiler/testData/diagnostics/tests/inference/recursiveTypes/recursiveOutIn.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/recursiveTypes/recursiveOutIn.fir.kt
@@ -1,5 +1,4 @@
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_EXPRESSION
-// !LANGUAGE: +NewInference
 
 interface Rec<out A: Rec<A, B>, in B>
 
diff --git a/compiler/testData/diagnostics/tests/inference/recursiveTypes/recursiveOutIn.kt b/compiler/testData/diagnostics/tests/inference/recursiveTypes/recursiveOutIn.kt
index 6586ccc486a..2ddf6ee1626 100644
--- a/compiler/testData/diagnostics/tests/inference/recursiveTypes/recursiveOutIn.kt
+++ b/compiler/testData/diagnostics/tests/inference/recursiveTypes/recursiveOutIn.kt
@@ -1,5 +1,4 @@
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_EXPRESSION
-// !LANGUAGE: +NewInference
 
 interface Rec<out A: Rec<A, B>, in B>
 
diff --git a/compiler/testData/diagnostics/tests/inference/recursiveTypes/twoTypeConstructors.fir.kt b/compiler/testData/diagnostics/tests/inference/recursiveTypes/twoTypeConstructors.fir.kt
index b1018e3d951..2805a28e141 100644
--- a/compiler/testData/diagnostics/tests/inference/recursiveTypes/twoTypeConstructors.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/recursiveTypes/twoTypeConstructors.fir.kt
@@ -1,5 +1,4 @@
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_EXPRESSION
-// !LANGUAGE: +NewInference
 
 fun <S> select(vararg args: S): S = TODO()
 
diff --git a/compiler/testData/diagnostics/tests/inference/recursiveTypes/twoTypeConstructors.kt b/compiler/testData/diagnostics/tests/inference/recursiveTypes/twoTypeConstructors.kt
index 1b3f3bf4e63..c125d5178fa 100644
--- a/compiler/testData/diagnostics/tests/inference/recursiveTypes/twoTypeConstructors.kt
+++ b/compiler/testData/diagnostics/tests/inference/recursiveTypes/twoTypeConstructors.kt
@@ -1,5 +1,4 @@
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_EXPRESSION
-// !LANGUAGE: +NewInference
 
 fun <S> select(vararg args: S): S = TODO()
 
diff --git a/compiler/testData/diagnostics/tests/inference/regressions/kt32250.kt b/compiler/testData/diagnostics/tests/inference/regressions/kt32250.kt
index ae4d1393b61..de74a19cf45 100644
--- a/compiler/testData/diagnostics/tests/inference/regressions/kt32250.kt
+++ b/compiler/testData/diagnostics/tests/inference/regressions/kt32250.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE
 
 interface I {
diff --git a/compiler/testData/diagnostics/tests/inference/regressions/kt34282.fir.kt b/compiler/testData/diagnostics/tests/inference/regressions/kt34282.fir.kt
index 129001733f8..c8c6d295544 100644
--- a/compiler/testData/diagnostics/tests/inference/regressions/kt34282.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/regressions/kt34282.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 fun bar(y: (Int) -> Int) = 1
diff --git a/compiler/testData/diagnostics/tests/inference/regressions/kt34282.kt b/compiler/testData/diagnostics/tests/inference/regressions/kt34282.kt
index 31e6521046d..fb130c6fd5e 100644
--- a/compiler/testData/diagnostics/tests/inference/regressions/kt34282.kt
+++ b/compiler/testData/diagnostics/tests/inference/regressions/kt34282.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 fun bar(y: (Int) -> Int) = 1
diff --git a/compiler/testData/diagnostics/tests/inference/regressions/kt35844.fir.kt b/compiler/testData/diagnostics/tests/inference/regressions/kt35844.fir.kt
index 280e4597ae1..6abf04c0cd8 100644
--- a/compiler/testData/diagnostics/tests/inference/regressions/kt35844.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/regressions/kt35844.fir.kt
@@ -1,6 +1,5 @@
 // SKIP_TXT
 // !DIAGNOSTICS: -UNUSED_PARAMETER
-// !LANGUAGE: +NewInference
 
 class A<X>
 
diff --git a/compiler/testData/diagnostics/tests/inference/regressions/kt35844.kt b/compiler/testData/diagnostics/tests/inference/regressions/kt35844.kt
index b837712cc75..f1567635b44 100644
--- a/compiler/testData/diagnostics/tests/inference/regressions/kt35844.kt
+++ b/compiler/testData/diagnostics/tests/inference/regressions/kt35844.kt
@@ -1,6 +1,5 @@
 // SKIP_TXT
 // !DIAGNOSTICS: -UNUSED_PARAMETER
-// !LANGUAGE: +NewInference
 
 class A<X>
 
diff --git a/compiler/testData/diagnostics/tests/inference/regressions/kt35943.fir.kt b/compiler/testData/diagnostics/tests/inference/regressions/kt35943.fir.kt
index 7eb269e5eff..50339c0043a 100644
--- a/compiler/testData/diagnostics/tests/inference/regressions/kt35943.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/regressions/kt35943.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 
 class Inv<I>
diff --git a/compiler/testData/diagnostics/tests/inference/regressions/kt35943.kt b/compiler/testData/diagnostics/tests/inference/regressions/kt35943.kt
index 1df6a7ca31e..a65d9b8edf9 100644
--- a/compiler/testData/diagnostics/tests/inference/regressions/kt35943.kt
+++ b/compiler/testData/diagnostics/tests/inference/regressions/kt35943.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 
 class Inv<I>
diff --git a/compiler/testData/diagnostics/tests/inference/regressions/kt37043.kt b/compiler/testData/diagnostics/tests/inference/regressions/kt37043.kt
index c9576bddc49..4058c42bfec 100644
--- a/compiler/testData/diagnostics/tests/inference/regressions/kt37043.kt
+++ b/compiler/testData/diagnostics/tests/inference/regressions/kt37043.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_PARAMETER -CAST_NEVER_SUCCEEDS -UNUSED_VARIABLE
 // FILE: Test.java
 
diff --git a/compiler/testData/diagnostics/tests/inference/regressions/kt37419.fir.kt b/compiler/testData/diagnostics/tests/inference/regressions/kt37419.fir.kt
index 11abafacedd..b69f6b11527 100644
--- a/compiler/testData/diagnostics/tests/inference/regressions/kt37419.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/regressions/kt37419.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE
 
 interface Receiver
diff --git a/compiler/testData/diagnostics/tests/inference/regressions/kt37419.kt b/compiler/testData/diagnostics/tests/inference/regressions/kt37419.kt
index e7f76461b7e..e1f1b9ec045 100644
--- a/compiler/testData/diagnostics/tests/inference/regressions/kt37419.kt
+++ b/compiler/testData/diagnostics/tests/inference/regressions/kt37419.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE
 
 interface Receiver
diff --git a/compiler/testData/diagnostics/tests/inference/regressions/kt37650.kt b/compiler/testData/diagnostics/tests/inference/regressions/kt37650.kt
index a9c74ce6434..c642cf9615a 100644
--- a/compiler/testData/diagnostics/tests/inference/regressions/kt37650.kt
+++ b/compiler/testData/diagnostics/tests/inference/regressions/kt37650.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE
 
 class Inv<T>
diff --git a/compiler/testData/diagnostics/tests/inference/regressions/kt38691.kt b/compiler/testData/diagnostics/tests/inference/regressions/kt38691.kt
index a17f01189d5..ee187f3e247 100644
--- a/compiler/testData/diagnostics/tests/inference/regressions/kt38691.kt
+++ b/compiler/testData/diagnostics/tests/inference/regressions/kt38691.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE
 
 class Inv<T>
diff --git a/compiler/testData/diagnostics/tests/inference/regressions/kt41386.fir.kt b/compiler/testData/diagnostics/tests/inference/regressions/kt41386.fir.kt
index cb7137d18d0..98e45b910e9 100644
--- a/compiler/testData/diagnostics/tests/inference/regressions/kt41386.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/regressions/kt41386.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 
 open class Test<T1, T2>(val map1 : Map<T1, T2>, val map2 : Map<T2, T1>) {
     open val inverse: Test<T2, T1> = object : Test<T2, T1>(<!ARGUMENT_TYPE_MISMATCH!>map2<!>, <!ARGUMENT_TYPE_MISMATCH!>map1<!>) {
diff --git a/compiler/testData/diagnostics/tests/inference/regressions/kt41386.kt b/compiler/testData/diagnostics/tests/inference/regressions/kt41386.kt
index 39ec46c8ec7..7f7baabd4a1 100644
--- a/compiler/testData/diagnostics/tests/inference/regressions/kt41386.kt
+++ b/compiler/testData/diagnostics/tests/inference/regressions/kt41386.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 
 open class Test<T1, T2>(val map1 : Map<T1, T2>, val map2 : Map<T2, T1>) {
     open val inverse: Test<T2, T1> = object : Test<T2, T1>(map2, map1) {
diff --git a/compiler/testData/diagnostics/tests/inference/starApproximation.kt b/compiler/testData/diagnostics/tests/inference/starApproximation.kt
index 1012076df88..d6c10174a68 100644
--- a/compiler/testData/diagnostics/tests/inference/starApproximation.kt
+++ b/compiler/testData/diagnostics/tests/inference/starApproximation.kt
@@ -1,6 +1,5 @@
 // FIR_IDENTICAL
 // SKIP_TXT
-// !LANGUAGE: +NewInference
 
 interface Self<E : Self<E>> {
     val x: E
diff --git a/compiler/testData/diagnostics/tests/inference/starApproximationBangBang.kt b/compiler/testData/diagnostics/tests/inference/starApproximationBangBang.kt
index f7dd72beff1..fbb9a5eb90f 100644
--- a/compiler/testData/diagnostics/tests/inference/starApproximationBangBang.kt
+++ b/compiler/testData/diagnostics/tests/inference/starApproximationBangBang.kt
@@ -1,6 +1,5 @@
 // FIR_IDENTICAL
 // SKIP_TXT
-// !LANGUAGE: +NewInference
 
 interface Self<E : Self<E>> {
     val x: E
diff --git a/compiler/testData/diagnostics/tests/inference/starApproximationFlexible.kt b/compiler/testData/diagnostics/tests/inference/starApproximationFlexible.kt
index f0ee315d5af..90e60a5af36 100644
--- a/compiler/testData/diagnostics/tests/inference/starApproximationFlexible.kt
+++ b/compiler/testData/diagnostics/tests/inference/starApproximationFlexible.kt
@@ -1,6 +1,5 @@
 // FIR_IDENTICAL
 // SKIP_TXT
-// !LANGUAGE: +NewInference
 
 // FILE: JavaClass.java
 public class JavaClass {
diff --git a/compiler/testData/diagnostics/tests/inference/starApproximationFromDifferentTypeParameter.kt b/compiler/testData/diagnostics/tests/inference/starApproximationFromDifferentTypeParameter.kt
index dc3b7853321..08c3ec942f5 100644
--- a/compiler/testData/diagnostics/tests/inference/starApproximationFromDifferentTypeParameter.kt
+++ b/compiler/testData/diagnostics/tests/inference/starApproximationFromDifferentTypeParameter.kt
@@ -1,6 +1,5 @@
 // FIR_IDENTICAL
 // SKIP_TXT
-// !LANGUAGE: +NewInference
 
 // See KT-14453 and KT-35703
 val <T : Any> KClass1<T>.primaryConstructor: KFunction1<T>? get() = null!!
diff --git a/compiler/testData/diagnostics/tests/inference/substitutions/kt32189returnTypeWithTypealiasSubtitution.kt b/compiler/testData/diagnostics/tests/inference/substitutions/kt32189returnTypeWithTypealiasSubtitution.kt
index 2576deba9b4..13f76f6dc18 100644
--- a/compiler/testData/diagnostics/tests/inference/substitutions/kt32189returnTypeWithTypealiasSubtitution.kt
+++ b/compiler/testData/diagnostics/tests/inference/substitutions/kt32189returnTypeWithTypealiasSubtitution.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -UNUSED_PARAMETER
 
 class B {
diff --git a/compiler/testData/diagnostics/tests/inference/tooEagerSmartcast.fir.kt b/compiler/testData/diagnostics/tests/inference/tooEagerSmartcast.fir.kt
index 8e05105cadc..7abe51b59f4 100644
--- a/compiler/testData/diagnostics/tests/inference/tooEagerSmartcast.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/tooEagerSmartcast.fir.kt
@@ -1,6 +1,5 @@
 // SKIP_TXT
 // !DIAGNOSTICS: -UNUSED_VARIABLE
-// !LANGUAGE: +NewInference
 
 interface OutBase<out E>
 interface OutDerived<out F> : OutBase<F>
diff --git a/compiler/testData/diagnostics/tests/inference/tooEagerSmartcast.kt b/compiler/testData/diagnostics/tests/inference/tooEagerSmartcast.kt
index 7a24f5ee640..0a5dc97fba0 100644
--- a/compiler/testData/diagnostics/tests/inference/tooEagerSmartcast.kt
+++ b/compiler/testData/diagnostics/tests/inference/tooEagerSmartcast.kt
@@ -1,6 +1,5 @@
 // SKIP_TXT
 // !DIAGNOSTICS: -UNUSED_VARIABLE
-// !LANGUAGE: +NewInference
 
 interface OutBase<out E>
 interface OutDerived<out F> : OutBase<F>
diff --git a/compiler/testData/diagnostics/tests/inference/typeParameterInConstructor.kt b/compiler/testData/diagnostics/tests/inference/typeParameterInConstructor.kt
index b789f748daa..f1424b0d01a 100644
--- a/compiler/testData/diagnostics/tests/inference/typeParameterInConstructor.kt
+++ b/compiler/testData/diagnostics/tests/inference/typeParameterInConstructor.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 
 class B<O>(val obj: O) {
     val v = B(obj)
diff --git a/compiler/testData/diagnostics/tests/inference/upperBounds/flexibilityInCommonSuperTypeCalculation.ni.fir.kt b/compiler/testData/diagnostics/tests/inference/upperBounds/flexibilityInCommonSuperTypeCalculation.ni.fir.kt
index fa91611dd6a..e05627fb0ca 100644
--- a/compiler/testData/diagnostics/tests/inference/upperBounds/flexibilityInCommonSuperTypeCalculation.ni.fir.kt
+++ b/compiler/testData/diagnostics/tests/inference/upperBounds/flexibilityInCommonSuperTypeCalculation.ni.fir.kt
@@ -1,5 +1,4 @@
 // !DIAGNOSTICS: -UNSUPPORTED -UNUSED_EXPRESSION -DEBUG_INFO_SMARTCAST -USELESS_CAST -UNUSED_PARAMETER -UNCHECKED_CAST -CAST_NEVER_SUCCEEDS -UNUSED_VARIABLE -UNREACHABLE_CODE -DEBUG_INFO_CONSTANT
-// !LANGUAGE: +NewInference
 // SKIP_TXT
 
 // FILE: Test.java
diff --git a/compiler/testData/diagnostics/tests/inference/upperBounds/flexibilityInCommonSuperTypeCalculation.ni.kt b/compiler/testData/diagnostics/tests/inference/upperBounds/flexibilityInCommonSuperTypeCalculation.ni.kt
index fe7d43113f8..e773180497c 100644
--- a/compiler/testData/diagnostics/tests/inference/upperBounds/flexibilityInCommonSuperTypeCalculation.ni.kt
+++ b/compiler/testData/diagnostics/tests/inference/upperBounds/flexibilityInCommonSuperTypeCalculation.ni.kt
@@ -1,5 +1,4 @@
 // !DIAGNOSTICS: -UNSUPPORTED -UNUSED_EXPRESSION -DEBUG_INFO_SMARTCAST -USELESS_CAST -UNUSED_PARAMETER -UNCHECKED_CAST -CAST_NEVER_SUCCEEDS -UNUSED_VARIABLE -UNREACHABLE_CODE -DEBUG_INFO_CONSTANT
-// !LANGUAGE: +NewInference
 // SKIP_TXT
 
 // FILE: Test.java
diff --git a/compiler/testData/diagnostics/tests/j+k/properties/fieldPropertyOverloadsNI.kt b/compiler/testData/diagnostics/tests/j+k/properties/fieldPropertyOverloadsNI.kt
index 19ddbaa136b..0c03ddbb404 100644
--- a/compiler/testData/diagnostics/tests/j+k/properties/fieldPropertyOverloadsNI.kt
+++ b/compiler/testData/diagnostics/tests/j+k/properties/fieldPropertyOverloadsNI.kt
@@ -1,6 +1,6 @@
 // FIR_IDENTICAL
 // SKIP_TXT
-// !LANGUAGE: +PreferJavaFieldOverload +NewInference
+// !LANGUAGE: +PreferJavaFieldOverload
 // !CHECK_TYPE
 
 // FILE: CompressionType.java
diff --git a/compiler/testData/diagnostics/tests/kt34857.kt b/compiler/testData/diagnostics/tests/kt34857.kt
index 3aed427fd0b..f05bd9cd6ad 100644
--- a/compiler/testData/diagnostics/tests/kt34857.kt
+++ b/compiler/testData/diagnostics/tests/kt34857.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 
 val Int.plusAssign: (Int) -> Unit
     get() = {}
diff --git a/compiler/testData/diagnostics/tests/namedArguments/mixedNamedPosition/defaults.fir.kt b/compiler/testData/diagnostics/tests/namedArguments/mixedNamedPosition/defaults.fir.kt
index 5c161f2ac92..1ed78caf2ad 100644
--- a/compiler/testData/diagnostics/tests/namedArguments/mixedNamedPosition/defaults.fir.kt
+++ b/compiler/testData/diagnostics/tests/namedArguments/mixedNamedPosition/defaults.fir.kt
@@ -1,4 +1,4 @@
-// !LANGUAGE: +NewInference +MixedNamedArgumentsInTheirOwnPosition
+// !LANGUAGE: +MixedNamedArgumentsInTheirOwnPosition
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // SKIP_TXT
 
diff --git a/compiler/testData/diagnostics/tests/namedArguments/mixedNamedPosition/defaults.kt b/compiler/testData/diagnostics/tests/namedArguments/mixedNamedPosition/defaults.kt
index 944f8b744c2..e93754b4267 100644
--- a/compiler/testData/diagnostics/tests/namedArguments/mixedNamedPosition/defaults.kt
+++ b/compiler/testData/diagnostics/tests/namedArguments/mixedNamedPosition/defaults.kt
@@ -1,4 +1,4 @@
-// !LANGUAGE: +NewInference +MixedNamedArgumentsInTheirOwnPosition
+// !LANGUAGE: +MixedNamedArgumentsInTheirOwnPosition
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // SKIP_TXT
 
diff --git a/compiler/testData/diagnostics/tests/namedArguments/mixedNamedPosition/disabledFeature.fir.kt b/compiler/testData/diagnostics/tests/namedArguments/mixedNamedPosition/disabledFeature.fir.kt
index 1b0b5918e3a..8189f7558ec 100644
--- a/compiler/testData/diagnostics/tests/namedArguments/mixedNamedPosition/disabledFeature.fir.kt
+++ b/compiler/testData/diagnostics/tests/namedArguments/mixedNamedPosition/disabledFeature.fir.kt
@@ -1,4 +1,4 @@
-// !LANGUAGE: +NewInference -MixedNamedArgumentsInTheirOwnPosition
+// !LANGUAGE: -MixedNamedArgumentsInTheirOwnPosition
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // SKIP_TXT
 
diff --git a/compiler/testData/diagnostics/tests/namedArguments/mixedNamedPosition/disabledFeature.kt b/compiler/testData/diagnostics/tests/namedArguments/mixedNamedPosition/disabledFeature.kt
index 2b1f273441e..6603a2813ef 100644
--- a/compiler/testData/diagnostics/tests/namedArguments/mixedNamedPosition/disabledFeature.kt
+++ b/compiler/testData/diagnostics/tests/namedArguments/mixedNamedPosition/disabledFeature.kt
@@ -1,4 +1,4 @@
-// !LANGUAGE: +NewInference -MixedNamedArgumentsInTheirOwnPosition
+// !LANGUAGE: -MixedNamedArgumentsInTheirOwnPosition
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // SKIP_TXT
 
diff --git a/compiler/testData/diagnostics/tests/namedArguments/mixedNamedPosition/secondNamed.fir.kt b/compiler/testData/diagnostics/tests/namedArguments/mixedNamedPosition/secondNamed.fir.kt
index 60037b304c0..d6c8deed9ac 100644
--- a/compiler/testData/diagnostics/tests/namedArguments/mixedNamedPosition/secondNamed.fir.kt
+++ b/compiler/testData/diagnostics/tests/namedArguments/mixedNamedPosition/secondNamed.fir.kt
@@ -1,4 +1,4 @@
-// !LANGUAGE: +NewInference +MixedNamedArgumentsInTheirOwnPosition
+// !LANGUAGE: +MixedNamedArgumentsInTheirOwnPosition
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // SKIP_TXT
 
diff --git a/compiler/testData/diagnostics/tests/namedArguments/mixedNamedPosition/secondNamed.kt b/compiler/testData/diagnostics/tests/namedArguments/mixedNamedPosition/secondNamed.kt
index d18712bbe5c..c4cda2d7b91 100644
--- a/compiler/testData/diagnostics/tests/namedArguments/mixedNamedPosition/secondNamed.kt
+++ b/compiler/testData/diagnostics/tests/namedArguments/mixedNamedPosition/secondNamed.kt
@@ -1,4 +1,4 @@
-// !LANGUAGE: +NewInference +MixedNamedArgumentsInTheirOwnPosition
+// !LANGUAGE: +MixedNamedArgumentsInTheirOwnPosition
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // SKIP_TXT
 
diff --git a/compiler/testData/diagnostics/tests/namedArguments/mixedNamedPosition/simple.fir.kt b/compiler/testData/diagnostics/tests/namedArguments/mixedNamedPosition/simple.fir.kt
index 0cd7f35115d..cd60b295afd 100644
--- a/compiler/testData/diagnostics/tests/namedArguments/mixedNamedPosition/simple.fir.kt
+++ b/compiler/testData/diagnostics/tests/namedArguments/mixedNamedPosition/simple.fir.kt
@@ -1,4 +1,4 @@
-// !LANGUAGE: +NewInference +MixedNamedArgumentsInTheirOwnPosition
+// !LANGUAGE: +MixedNamedArgumentsInTheirOwnPosition
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // SKIP_TXT
 
diff --git a/compiler/testData/diagnostics/tests/namedArguments/mixedNamedPosition/simple.kt b/compiler/testData/diagnostics/tests/namedArguments/mixedNamedPosition/simple.kt
index f54b81f774c..938023d9d9b 100644
--- a/compiler/testData/diagnostics/tests/namedArguments/mixedNamedPosition/simple.kt
+++ b/compiler/testData/diagnostics/tests/namedArguments/mixedNamedPosition/simple.kt
@@ -1,4 +1,4 @@
-// !LANGUAGE: +NewInference +MixedNamedArgumentsInTheirOwnPosition
+// !LANGUAGE: +MixedNamedArgumentsInTheirOwnPosition
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // SKIP_TXT
 
diff --git a/compiler/testData/diagnostics/tests/namedArguments/mixedNamedPosition/varargs.fir.kt b/compiler/testData/diagnostics/tests/namedArguments/mixedNamedPosition/varargs.fir.kt
index 1d9b4c8c58e..ee89378bd7a 100644
--- a/compiler/testData/diagnostics/tests/namedArguments/mixedNamedPosition/varargs.fir.kt
+++ b/compiler/testData/diagnostics/tests/namedArguments/mixedNamedPosition/varargs.fir.kt
@@ -1,4 +1,4 @@
-// !LANGUAGE: +NewInference +MixedNamedArgumentsInTheirOwnPosition +AllowAssigningArrayElementsToVarargsInNamedFormForFunctions
+// !LANGUAGE: +MixedNamedArgumentsInTheirOwnPosition +AllowAssigningArrayElementsToVarargsInNamedFormForFunctions
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // SKIP_TXT
 
diff --git a/compiler/testData/diagnostics/tests/namedArguments/mixedNamedPosition/varargs.kt b/compiler/testData/diagnostics/tests/namedArguments/mixedNamedPosition/varargs.kt
index 8e171bdd5c0..59fce610a0e 100644
--- a/compiler/testData/diagnostics/tests/namedArguments/mixedNamedPosition/varargs.kt
+++ b/compiler/testData/diagnostics/tests/namedArguments/mixedNamedPosition/varargs.kt
@@ -1,4 +1,4 @@
-// !LANGUAGE: +NewInference +MixedNamedArgumentsInTheirOwnPosition +AllowAssigningArrayElementsToVarargsInNamedFormForFunctions
+// !LANGUAGE: +MixedNamedArgumentsInTheirOwnPosition +AllowAssigningArrayElementsToVarargsInNamedFormForFunctions
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // SKIP_TXT
 
diff --git a/compiler/testData/diagnostics/tests/nullabilityAndSmartCasts/kt30734.fir.kt b/compiler/testData/diagnostics/tests/nullabilityAndSmartCasts/kt30734.fir.kt
index d9ef44e524f..e9196c6a85a 100644
--- a/compiler/testData/diagnostics/tests/nullabilityAndSmartCasts/kt30734.fir.kt
+++ b/compiler/testData/diagnostics/tests/nullabilityAndSmartCasts/kt30734.fir.kt
@@ -1,5 +1,4 @@
 // !DIAGNOSTICS: -UNUSED_VARIABLE
-// !LANGUAGE: +NewInference
 // Issue: KT-30734
 
 class Sample {
diff --git a/compiler/testData/diagnostics/tests/nullabilityAndSmartCasts/kt30734.kt b/compiler/testData/diagnostics/tests/nullabilityAndSmartCasts/kt30734.kt
index 53a1579a429..8ee54e35e89 100644
--- a/compiler/testData/diagnostics/tests/nullabilityAndSmartCasts/kt30734.kt
+++ b/compiler/testData/diagnostics/tests/nullabilityAndSmartCasts/kt30734.kt
@@ -1,5 +1,4 @@
 // !DIAGNOSTICS: -UNUSED_VARIABLE
-// !LANGUAGE: +NewInference
 // Issue: KT-30734
 
 class Sample {
diff --git a/compiler/testData/diagnostics/tests/nullableTypes/definitelyNotNullWithNullableBound.kt b/compiler/testData/diagnostics/tests/nullableTypes/definitelyNotNullWithNullableBound.kt
index 1a6d16b087a..297264af9bf 100644
--- a/compiler/testData/diagnostics/tests/nullableTypes/definitelyNotNullWithNullableBound.kt
+++ b/compiler/testData/diagnostics/tests/nullableTypes/definitelyNotNullWithNullableBound.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_EXPRESSION
 
 fun <D> makeDefinitelyNotNull(arg: D?): D = TODO()
diff --git a/compiler/testData/diagnostics/tests/nullableTypes/inferenceFlexibleTToNullable.fir.kt b/compiler/testData/diagnostics/tests/nullableTypes/inferenceFlexibleTToNullable.fir.kt
index 5bd103abf79..80a1eb0fd75 100644
--- a/compiler/testData/diagnostics/tests/nullableTypes/inferenceFlexibleTToNullable.fir.kt
+++ b/compiler/testData/diagnostics/tests/nullableTypes/inferenceFlexibleTToNullable.fir.kt
@@ -1,5 +1,4 @@
 // !DIAGNOSTICS: -UNUSED_VARIABLE -UNCHECKED_CAST -UNUSED_VALUE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE
-// !LANGUAGE: +NewInference
 // SKIP_TXT
 
 // FILE: Foo.java
diff --git a/compiler/testData/diagnostics/tests/nullableTypes/inferenceFlexibleTToNullable.kt b/compiler/testData/diagnostics/tests/nullableTypes/inferenceFlexibleTToNullable.kt
index 8bda3e5676a..6fe40cd464f 100644
--- a/compiler/testData/diagnostics/tests/nullableTypes/inferenceFlexibleTToNullable.kt
+++ b/compiler/testData/diagnostics/tests/nullableTypes/inferenceFlexibleTToNullable.kt
@@ -1,5 +1,4 @@
 // !DIAGNOSTICS: -UNUSED_VARIABLE -UNCHECKED_CAST -UNUSED_VALUE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE
-// !LANGUAGE: +NewInference
 // SKIP_TXT
 
 // FILE: Foo.java
diff --git a/compiler/testData/diagnostics/tests/nullableTypes/takingNullabilityFromExplicitTypeArgmentsInsteadOfUsingFlexibleTypes.fir.kt b/compiler/testData/diagnostics/tests/nullableTypes/takingNullabilityFromExplicitTypeArgmentsInsteadOfUsingFlexibleTypes.fir.kt
index 98b7bfe6764..e2f5217032e 100644
--- a/compiler/testData/diagnostics/tests/nullableTypes/takingNullabilityFromExplicitTypeArgmentsInsteadOfUsingFlexibleTypes.fir.kt
+++ b/compiler/testData/diagnostics/tests/nullableTypes/takingNullabilityFromExplicitTypeArgmentsInsteadOfUsingFlexibleTypes.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 
 // It's relevant only for Java constructor calls
 
diff --git a/compiler/testData/diagnostics/tests/nullableTypes/takingNullabilityFromExplicitTypeArgmentsInsteadOfUsingFlexibleTypes.kt b/compiler/testData/diagnostics/tests/nullableTypes/takingNullabilityFromExplicitTypeArgmentsInsteadOfUsingFlexibleTypes.kt
index 381be01fd41..060cfcca1f2 100644
--- a/compiler/testData/diagnostics/tests/nullableTypes/takingNullabilityFromExplicitTypeArgmentsInsteadOfUsingFlexibleTypes.kt
+++ b/compiler/testData/diagnostics/tests/nullableTypes/takingNullabilityFromExplicitTypeArgmentsInsteadOfUsingFlexibleTypes.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 
 // It's relevant only for Java constructor calls
 
diff --git a/compiler/testData/diagnostics/tests/numbers/numberAsUnionAndIntersection.kt b/compiler/testData/diagnostics/tests/numbers/numberAsUnionAndIntersection.kt
index 58424f6d81d..cafdf176925 100644
--- a/compiler/testData/diagnostics/tests/numbers/numberAsUnionAndIntersection.kt
+++ b/compiler/testData/diagnostics/tests/numbers/numberAsUnionAndIntersection.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 fun test(numbers: List<Number>) {
diff --git a/compiler/testData/diagnostics/tests/overload/disambiguateByFailedAbstractClassCheck.kt b/compiler/testData/diagnostics/tests/overload/disambiguateByFailedAbstractClassCheck.kt
index c750d7ef086..25571732561 100644
--- a/compiler/testData/diagnostics/tests/overload/disambiguateByFailedAbstractClassCheck.kt
+++ b/compiler/testData/diagnostics/tests/overload/disambiguateByFailedAbstractClassCheck.kt
@@ -1,6 +1,5 @@
 // FIR_IDENTICAL
 // !WITH_NEW_IFERENCE
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 // FILE: packageA.kt
diff --git a/compiler/testData/diagnostics/tests/platformTypes/methodCall/flexibilityThroughTypeVariable.kt b/compiler/testData/diagnostics/tests/platformTypes/methodCall/flexibilityThroughTypeVariable.kt
index cc6f630d3e9..74ad63712bc 100644
--- a/compiler/testData/diagnostics/tests/platformTypes/methodCall/flexibilityThroughTypeVariable.kt
+++ b/compiler/testData/diagnostics/tests/platformTypes/methodCall/flexibilityThroughTypeVariable.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 // Issue: KT-36254
diff --git a/compiler/testData/diagnostics/tests/platformTypes/methodCall/flexibilityThroughTypeVariableOut.kt b/compiler/testData/diagnostics/tests/platformTypes/methodCall/flexibilityThroughTypeVariableOut.kt
index 8a9355e6e85..325a1c1d5cf 100644
--- a/compiler/testData/diagnostics/tests/platformTypes/methodCall/flexibilityThroughTypeVariableOut.kt
+++ b/compiler/testData/diagnostics/tests/platformTypes/methodCall/flexibilityThroughTypeVariableOut.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 // Issue: KT-36254
diff --git a/compiler/testData/diagnostics/tests/platformTypes/methodCall/kt27565.kt b/compiler/testData/diagnostics/tests/platformTypes/methodCall/kt27565.kt
index a43295c5461..f9e0d1fb5ba 100644
--- a/compiler/testData/diagnostics/tests/platformTypes/methodCall/kt27565.kt
+++ b/compiler/testData/diagnostics/tests/platformTypes/methodCall/kt27565.kt
@@ -1,5 +1,5 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference +SamConversionForKotlinFunctions
+// !LANGUAGE: +SamConversionForKotlinFunctions
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // ISSUE: KT-27565
 
diff --git a/compiler/testData/diagnostics/tests/regressions/kt12898.fir.kt b/compiler/testData/diagnostics/tests/regressions/kt12898.fir.kt
index c62673ba5f2..ee3bc863a92 100644
--- a/compiler/testData/diagnostics/tests/regressions/kt12898.fir.kt
+++ b/compiler/testData/diagnostics/tests/regressions/kt12898.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 
 interface B<T : S?, S : Any> {
     val t: T
diff --git a/compiler/testData/diagnostics/tests/regressions/kt12898.kt b/compiler/testData/diagnostics/tests/regressions/kt12898.kt
index 6171b0fdf6c..d2cfe66d464 100644
--- a/compiler/testData/diagnostics/tests/regressions/kt12898.kt
+++ b/compiler/testData/diagnostics/tests/regressions/kt12898.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 
 interface B<T : S?, S : Any> {
     val t: T
diff --git a/compiler/testData/diagnostics/tests/regressions/kt30245.fir.kt b/compiler/testData/diagnostics/tests/regressions/kt30245.fir.kt
index 4a05ef61e77..87309d23cb3 100644
--- a/compiler/testData/diagnostics/tests/regressions/kt30245.fir.kt
+++ b/compiler/testData/diagnostics/tests/regressions/kt30245.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -UNUSED_ANONYMOUS_PARAMETER -UNUSED_PARAMETER -UNUSED_EXPRESSION
 
 class Sample
diff --git a/compiler/testData/diagnostics/tests/regressions/kt30245.kt b/compiler/testData/diagnostics/tests/regressions/kt30245.kt
index 86615a01a8a..c3a2fd141a7 100644
--- a/compiler/testData/diagnostics/tests/regressions/kt30245.kt
+++ b/compiler/testData/diagnostics/tests/regressions/kt30245.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -UNUSED_ANONYMOUS_PARAMETER -UNUSED_PARAMETER -UNUSED_EXPRESSION
 
 class Sample
diff --git a/compiler/testData/diagnostics/tests/regressions/kt31975.fir.kt b/compiler/testData/diagnostics/tests/regressions/kt31975.fir.kt
index c6ce0a755c6..3b3417e6f01 100644
--- a/compiler/testData/diagnostics/tests/regressions/kt31975.fir.kt
+++ b/compiler/testData/diagnostics/tests/regressions/kt31975.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 interface MemoizedFunctionToNotNull<K, V>
diff --git a/compiler/testData/diagnostics/tests/regressions/kt31975.kt b/compiler/testData/diagnostics/tests/regressions/kt31975.kt
index f38ee5a008c..c777fccd910 100644
--- a/compiler/testData/diagnostics/tests/regressions/kt31975.kt
+++ b/compiler/testData/diagnostics/tests/regressions/kt31975.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 interface MemoizedFunctionToNotNull<K, V>
diff --git a/compiler/testData/diagnostics/tests/regressions/kt32507.fir.kt b/compiler/testData/diagnostics/tests/regressions/kt32507.fir.kt
index d215d2b6135..4b28320c041 100644
--- a/compiler/testData/diagnostics/tests/regressions/kt32507.fir.kt
+++ b/compiler/testData/diagnostics/tests/regressions/kt32507.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 
 fun foo(bar: Any?): Int {
     bar as String?
diff --git a/compiler/testData/diagnostics/tests/regressions/kt32507.kt b/compiler/testData/diagnostics/tests/regressions/kt32507.kt
index 14e13ed6181..bda593b71bc 100644
--- a/compiler/testData/diagnostics/tests/regressions/kt32507.kt
+++ b/compiler/testData/diagnostics/tests/regressions/kt32507.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 
 fun foo(bar: Any?): Int {
     bar as String?
diff --git a/compiler/testData/diagnostics/tests/regressions/kt32792.fir.kt b/compiler/testData/diagnostics/tests/regressions/kt32792.fir.kt
index d74ac248b30..c37e3e87d38 100644
--- a/compiler/testData/diagnostics/tests/regressions/kt32792.fir.kt
+++ b/compiler/testData/diagnostics/tests/regressions/kt32792.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 
 inline fun <T> tryLambdas(lamb : () -> T) : T{
     return lamb.invoke()
diff --git a/compiler/testData/diagnostics/tests/regressions/kt32792.kt b/compiler/testData/diagnostics/tests/regressions/kt32792.kt
index a43473e753f..ca9d37cbb0b 100644
--- a/compiler/testData/diagnostics/tests/regressions/kt32792.kt
+++ b/compiler/testData/diagnostics/tests/regressions/kt32792.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 
 inline fun <T> tryLambdas(lamb : () -> T) : T{
     return lamb.invoke()
diff --git a/compiler/testData/diagnostics/tests/regressions/kt35626.kt b/compiler/testData/diagnostics/tests/regressions/kt35626.kt
index f301a0d0a37..dfec8162feb 100644
--- a/compiler/testData/diagnostics/tests/regressions/kt35626.kt
+++ b/compiler/testData/diagnostics/tests/regressions/kt35626.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 class Result<T> {
diff --git a/compiler/testData/diagnostics/tests/regressions/kt35626small.kt b/compiler/testData/diagnostics/tests/regressions/kt35626small.kt
index 6b49e3dbcd6..5271d1444a2 100644
--- a/compiler/testData/diagnostics/tests/regressions/kt35626small.kt
+++ b/compiler/testData/diagnostics/tests/regressions/kt35626small.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 class Result<T> {
diff --git a/compiler/testData/diagnostics/tests/regressions/kt35668.fir.kt b/compiler/testData/diagnostics/tests/regressions/kt35668.fir.kt
index f32337094bb..af434e40c14 100644
--- a/compiler/testData/diagnostics/tests/regressions/kt35668.fir.kt
+++ b/compiler/testData/diagnostics/tests/regressions/kt35668.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 fun main() {
diff --git a/compiler/testData/diagnostics/tests/regressions/kt35668.kt b/compiler/testData/diagnostics/tests/regressions/kt35668.kt
index fc378921ef4..7c0524c7426 100644
--- a/compiler/testData/diagnostics/tests/regressions/kt35668.kt
+++ b/compiler/testData/diagnostics/tests/regressions/kt35668.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 fun main() {
diff --git a/compiler/testData/diagnostics/tests/regressions/kt36222.kt b/compiler/testData/diagnostics/tests/regressions/kt36222.kt
index dd3c5873254..97caba3778b 100644
--- a/compiler/testData/diagnostics/tests/regressions/kt36222.kt
+++ b/compiler/testData/diagnostics/tests/regressions/kt36222.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 fun foo(f: () -> String) {}
diff --git a/compiler/testData/diagnostics/tests/regressions/testNestedSpecialCalls.fir.kt b/compiler/testData/diagnostics/tests/regressions/testNestedSpecialCalls.fir.kt
index bbdd248d6fa..72dd881e445 100644
--- a/compiler/testData/diagnostics/tests/regressions/testNestedSpecialCalls.fir.kt
+++ b/compiler/testData/diagnostics/tests/regressions/testNestedSpecialCalls.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNREACHABLE_CODE
 
 fun test() {
diff --git a/compiler/testData/diagnostics/tests/regressions/testNestedSpecialCalls.kt b/compiler/testData/diagnostics/tests/regressions/testNestedSpecialCalls.kt
index 421f7c5fa25..213b3ed6e9d 100644
--- a/compiler/testData/diagnostics/tests/regressions/testNestedSpecialCalls.kt
+++ b/compiler/testData/diagnostics/tests/regressions/testNestedSpecialCalls.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNREACHABLE_CODE
 
 fun test() {
diff --git a/compiler/testData/diagnostics/tests/resolve/callableReferenceInCST.fir.kt b/compiler/testData/diagnostics/tests/resolve/callableReferenceInCST.fir.kt
index 6152c6d22c4..70f6022faa3 100644
--- a/compiler/testData/diagnostics/tests/resolve/callableReferenceInCST.fir.kt
+++ b/compiler/testData/diagnostics/tests/resolve/callableReferenceInCST.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE
 
 fun testWhen(x: Any?) {
diff --git a/compiler/testData/diagnostics/tests/resolve/callableReferenceInCST.kt b/compiler/testData/diagnostics/tests/resolve/callableReferenceInCST.kt
index a95f2b3796c..c7661cdffe1 100644
--- a/compiler/testData/diagnostics/tests/resolve/callableReferenceInCST.kt
+++ b/compiler/testData/diagnostics/tests/resolve/callableReferenceInCST.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE
 
 fun testWhen(x: Any?) {
diff --git a/compiler/testData/diagnostics/tests/samConversions/DisabledForKTSimple.fir.kt b/compiler/testData/diagnostics/tests/samConversions/DisabledForKTSimple.fir.kt
index 0469055b4ff..36d807d5192 100644
--- a/compiler/testData/diagnostics/tests/samConversions/DisabledForKTSimple.fir.kt
+++ b/compiler/testData/diagnostics/tests/samConversions/DisabledForKTSimple.fir.kt
@@ -1,4 +1,4 @@
-// !LANGUAGE: +NewInference -SamConversionForKotlinFunctions
+// !LANGUAGE: -SamConversionForKotlinFunctions
 // FILE: Runnable.java
 public interface Runnable {
     void run();
diff --git a/compiler/testData/diagnostics/tests/samConversions/DisabledForKTSimple.kt b/compiler/testData/diagnostics/tests/samConversions/DisabledForKTSimple.kt
index 530bc47077c..44383f9f396 100644
--- a/compiler/testData/diagnostics/tests/samConversions/DisabledForKTSimple.kt
+++ b/compiler/testData/diagnostics/tests/samConversions/DisabledForKTSimple.kt
@@ -1,4 +1,4 @@
-// !LANGUAGE: +NewInference -SamConversionForKotlinFunctions
+// !LANGUAGE: -SamConversionForKotlinFunctions
 // FILE: Runnable.java
 public interface Runnable {
     void run();
diff --git a/compiler/testData/diagnostics/tests/samConversions/GenericSubstitution.kt b/compiler/testData/diagnostics/tests/samConversions/GenericSubstitution.kt
index 18764bda928..6a11cdbb2aa 100644
--- a/compiler/testData/diagnostics/tests/samConversions/GenericSubstitution.kt
+++ b/compiler/testData/diagnostics/tests/samConversions/GenericSubstitution.kt
@@ -1,5 +1,5 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference +SamConversionPerArgument
+// !LANGUAGE: +SamConversionPerArgument
 // !CHECK_TYPE
 // FILE: J.java
 public interface J<T> {
diff --git a/compiler/testData/diagnostics/tests/samConversions/GenericSubstitutionKT.kt b/compiler/testData/diagnostics/tests/samConversions/GenericSubstitutionKT.kt
index 6cac421e69a..4260cf1d7a3 100644
--- a/compiler/testData/diagnostics/tests/samConversions/GenericSubstitutionKT.kt
+++ b/compiler/testData/diagnostics/tests/samConversions/GenericSubstitutionKT.kt
@@ -1,5 +1,5 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference +SamConversionForKotlinFunctions +SamConversionPerArgument
+// !LANGUAGE: +SamConversionForKotlinFunctions +SamConversionPerArgument
 // !CHECK_TYPE
 // FILE: F.java
 public interface F<S> {
diff --git a/compiler/testData/diagnostics/tests/samConversions/SAMAfterSubstitution.kt b/compiler/testData/diagnostics/tests/samConversions/SAMAfterSubstitution.kt
index cb134631770..53b6c363a10 100644
--- a/compiler/testData/diagnostics/tests/samConversions/SAMAfterSubstitution.kt
+++ b/compiler/testData/diagnostics/tests/samConversions/SAMAfterSubstitution.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // FILE: J.java
 public interface J<T> {
     public void foo(T r1, T r2);
diff --git a/compiler/testData/diagnostics/tests/samConversions/SAMAfterSubstitutionKT.kt b/compiler/testData/diagnostics/tests/samConversions/SAMAfterSubstitutionKT.kt
index cdc6cdba79e..289769ec58c 100644
--- a/compiler/testData/diagnostics/tests/samConversions/SAMAfterSubstitutionKT.kt
+++ b/compiler/testData/diagnostics/tests/samConversions/SAMAfterSubstitutionKT.kt
@@ -1,5 +1,5 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference +SamConversionForKotlinFunctions
+// !LANGUAGE: +SamConversionForKotlinFunctions
 // FILE: Runnable.java
 public interface Runnable {
     void run();
diff --git a/compiler/testData/diagnostics/tests/samConversions/SimpleCorrect.kt b/compiler/testData/diagnostics/tests/samConversions/SimpleCorrect.kt
index 49af1f72820..acec775f424 100644
--- a/compiler/testData/diagnostics/tests/samConversions/SimpleCorrect.kt
+++ b/compiler/testData/diagnostics/tests/samConversions/SimpleCorrect.kt
@@ -1,5 +1,5 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference +SamConversionPerArgument
+// !LANGUAGE: +SamConversionPerArgument
 // FILE: J.java
 public interface J {
     public void foo1(Runnable r);
diff --git a/compiler/testData/diagnostics/tests/samConversions/SimpleCorrectKT.kt b/compiler/testData/diagnostics/tests/samConversions/SimpleCorrectKT.kt
index 14639a2355a..1be7f554d49 100644
--- a/compiler/testData/diagnostics/tests/samConversions/SimpleCorrectKT.kt
+++ b/compiler/testData/diagnostics/tests/samConversions/SimpleCorrectKT.kt
@@ -1,5 +1,5 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference +SamConversionForKotlinFunctions +SamConversionPerArgument
+// !LANGUAGE: +SamConversionForKotlinFunctions +SamConversionPerArgument
 // FILE: Runnable.java
 public interface Runnable {
     void run();
diff --git a/compiler/testData/diagnostics/tests/samConversions/arrayAsVarargAfterSamArgument.fir.kt b/compiler/testData/diagnostics/tests/samConversions/arrayAsVarargAfterSamArgument.fir.kt
index 0a27998e0f1..54d1ab04504 100644
--- a/compiler/testData/diagnostics/tests/samConversions/arrayAsVarargAfterSamArgument.fir.kt
+++ b/compiler/testData/diagnostics/tests/samConversions/arrayAsVarargAfterSamArgument.fir.kt
@@ -1,5 +1,5 @@
 // !DIAGNOSTICS: -UNUSED_VARIABLE
-// !LANGUAGE: +NewInference +SamConversionForKotlinFunctions +SamConversionPerArgument -ProhibitVarargAsArrayAfterSamArgument
+// !LANGUAGE: +SamConversionForKotlinFunctions +SamConversionPerArgument -ProhibitVarargAsArrayAfterSamArgument
 // IGNORE_BACKEND: JS
 // SKIP_TXT
 
diff --git a/compiler/testData/diagnostics/tests/samConversions/arrayAsVarargAfterSamArgument.kt b/compiler/testData/diagnostics/tests/samConversions/arrayAsVarargAfterSamArgument.kt
index 914565f6f7c..188ae45595c 100644
--- a/compiler/testData/diagnostics/tests/samConversions/arrayAsVarargAfterSamArgument.kt
+++ b/compiler/testData/diagnostics/tests/samConversions/arrayAsVarargAfterSamArgument.kt
@@ -1,5 +1,5 @@
 // !DIAGNOSTICS: -UNUSED_VARIABLE
-// !LANGUAGE: +NewInference +SamConversionForKotlinFunctions +SamConversionPerArgument -ProhibitVarargAsArrayAfterSamArgument
+// !LANGUAGE: +SamConversionForKotlinFunctions +SamConversionPerArgument -ProhibitVarargAsArrayAfterSamArgument
 // IGNORE_BACKEND: JS
 // SKIP_TXT
 
diff --git a/compiler/testData/diagnostics/tests/samConversions/arrayAsVarargAfterSamArgumentProhibited.fir.kt b/compiler/testData/diagnostics/tests/samConversions/arrayAsVarargAfterSamArgumentProhibited.fir.kt
index 417dd9ccaeb..11ee2cb5bac 100644
--- a/compiler/testData/diagnostics/tests/samConversions/arrayAsVarargAfterSamArgumentProhibited.fir.kt
+++ b/compiler/testData/diagnostics/tests/samConversions/arrayAsVarargAfterSamArgumentProhibited.fir.kt
@@ -1,5 +1,5 @@
 // !DIAGNOSTICS: -UNUSED_VARIABLE
-// !LANGUAGE: +NewInference +SamConversionForKotlinFunctions +SamConversionPerArgument +ProhibitVarargAsArrayAfterSamArgument
+// !LANGUAGE: +SamConversionForKotlinFunctions +SamConversionPerArgument +ProhibitVarargAsArrayAfterSamArgument
 // IGNORE_BACKEND: JS
 // SKIP_TXT
 
diff --git a/compiler/testData/diagnostics/tests/samConversions/arrayAsVarargAfterSamArgumentProhibited.kt b/compiler/testData/diagnostics/tests/samConversions/arrayAsVarargAfterSamArgumentProhibited.kt
index b592083563c..1360ff29209 100644
--- a/compiler/testData/diagnostics/tests/samConversions/arrayAsVarargAfterSamArgumentProhibited.kt
+++ b/compiler/testData/diagnostics/tests/samConversions/arrayAsVarargAfterSamArgumentProhibited.kt
@@ -1,5 +1,5 @@
 // !DIAGNOSTICS: -UNUSED_VARIABLE
-// !LANGUAGE: +NewInference +SamConversionForKotlinFunctions +SamConversionPerArgument +ProhibitVarargAsArrayAfterSamArgument
+// !LANGUAGE: +SamConversionForKotlinFunctions +SamConversionPerArgument +ProhibitVarargAsArrayAfterSamArgument
 // IGNORE_BACKEND: JS
 // SKIP_TXT
 
diff --git a/compiler/testData/diagnostics/tests/samConversions/arrayAsVarargAfterSamArgumentWithoutSamConversionsPerArgument.fir.kt b/compiler/testData/diagnostics/tests/samConversions/arrayAsVarargAfterSamArgumentWithoutSamConversionsPerArgument.fir.kt
index 0a831875e5a..deb72848e98 100644
--- a/compiler/testData/diagnostics/tests/samConversions/arrayAsVarargAfterSamArgumentWithoutSamConversionsPerArgument.fir.kt
+++ b/compiler/testData/diagnostics/tests/samConversions/arrayAsVarargAfterSamArgumentWithoutSamConversionsPerArgument.fir.kt
@@ -1,5 +1,5 @@
 // !DIAGNOSTICS: -UNUSED_VARIABLE
-// !LANGUAGE: +NewInference +SamConversionForKotlinFunctions -ProhibitVarargAsArrayAfterSamArgument -SamConversionPerArgument
+// !LANGUAGE: +SamConversionForKotlinFunctions -ProhibitVarargAsArrayAfterSamArgument -SamConversionPerArgument
 // IGNORE_BACKEND: JS, JS_IR
 // SKIP_TXT
 
diff --git a/compiler/testData/diagnostics/tests/samConversions/arrayAsVarargAfterSamArgumentWithoutSamConversionsPerArgument.kt b/compiler/testData/diagnostics/tests/samConversions/arrayAsVarargAfterSamArgumentWithoutSamConversionsPerArgument.kt
index 55ea9d953c3..5bd25d822d1 100644
--- a/compiler/testData/diagnostics/tests/samConversions/arrayAsVarargAfterSamArgumentWithoutSamConversionsPerArgument.kt
+++ b/compiler/testData/diagnostics/tests/samConversions/arrayAsVarargAfterSamArgumentWithoutSamConversionsPerArgument.kt
@@ -1,5 +1,5 @@
 // !DIAGNOSTICS: -UNUSED_VARIABLE
-// !LANGUAGE: +NewInference +SamConversionForKotlinFunctions -ProhibitVarargAsArrayAfterSamArgument -SamConversionPerArgument
+// !LANGUAGE: +SamConversionForKotlinFunctions -ProhibitVarargAsArrayAfterSamArgument -SamConversionPerArgument
 // IGNORE_BACKEND: JS, JS_IR
 // SKIP_TXT
 
diff --git a/compiler/testData/diagnostics/tests/samConversions/checkSamConversionsAreDisabledByDefault.fir.kt b/compiler/testData/diagnostics/tests/samConversions/checkSamConversionsAreDisabledByDefault.fir.kt
index 83caa77e696..41627204338 100644
--- a/compiler/testData/diagnostics/tests/samConversions/checkSamConversionsAreDisabledByDefault.fir.kt
+++ b/compiler/testData/diagnostics/tests/samConversions/checkSamConversionsAreDisabledByDefault.fir.kt
@@ -1,4 +1,4 @@
-// !LANGUAGE: +NewInference -SamConversionForKotlinFunctions
+// !LANGUAGE: -SamConversionForKotlinFunctions
 // FILE: Runnable.java
 public interface Runnable {
     void run();
diff --git a/compiler/testData/diagnostics/tests/samConversions/checkSamConversionsAreDisabledByDefault.kt b/compiler/testData/diagnostics/tests/samConversions/checkSamConversionsAreDisabledByDefault.kt
index 7b6211a7b0d..fccde2a7166 100644
--- a/compiler/testData/diagnostics/tests/samConversions/checkSamConversionsAreDisabledByDefault.kt
+++ b/compiler/testData/diagnostics/tests/samConversions/checkSamConversionsAreDisabledByDefault.kt
@@ -1,4 +1,4 @@
-// !LANGUAGE: +NewInference -SamConversionForKotlinFunctions
+// !LANGUAGE: -SamConversionForKotlinFunctions
 // FILE: Runnable.java
 public interface Runnable {
     void run();
diff --git a/compiler/testData/diagnostics/tests/samConversions/samConversionToGeneric.fir.kt b/compiler/testData/diagnostics/tests/samConversions/samConversionToGeneric.fir.kt
index 1456634ff6a..8df5c9a6ada 100644
--- a/compiler/testData/diagnostics/tests/samConversions/samConversionToGeneric.fir.kt
+++ b/compiler/testData/diagnostics/tests/samConversions/samConversionToGeneric.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 
 // FILE: samConversionToGeneric.kt
 
diff --git a/compiler/testData/diagnostics/tests/samConversions/samConversionToGeneric.kt b/compiler/testData/diagnostics/tests/samConversions/samConversionToGeneric.kt
index b85a40a361d..7fab6d479e9 100644
--- a/compiler/testData/diagnostics/tests/samConversions/samConversionToGeneric.kt
+++ b/compiler/testData/diagnostics/tests/samConversions/samConversionToGeneric.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 
 // FILE: samConversionToGeneric.kt
 
diff --git a/compiler/testData/diagnostics/tests/samConversions/samConversionsWithSmartCasts.fir.kt b/compiler/testData/diagnostics/tests/samConversions/samConversionsWithSmartCasts.fir.kt
index 2e608d4c41e..ded53ee0e63 100644
--- a/compiler/testData/diagnostics/tests/samConversions/samConversionsWithSmartCasts.fir.kt
+++ b/compiler/testData/diagnostics/tests/samConversions/samConversionsWithSmartCasts.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 
 // NB new inference doesn't really work with old JVM back-end.
 
diff --git a/compiler/testData/diagnostics/tests/samConversions/samConversionsWithSmartCasts.kt b/compiler/testData/diagnostics/tests/samConversions/samConversionsWithSmartCasts.kt
index 387525c939b..3d92ee03301 100644
--- a/compiler/testData/diagnostics/tests/samConversions/samConversionsWithSmartCasts.kt
+++ b/compiler/testData/diagnostics/tests/samConversions/samConversionsWithSmartCasts.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 
 // NB new inference doesn't really work with old JVM back-end.
 
diff --git a/compiler/testData/diagnostics/tests/samConversions/sameCandidatesFromKotlinAndJavaInOneScope.kt b/compiler/testData/diagnostics/tests/samConversions/sameCandidatesFromKotlinAndJavaInOneScope.kt
index 8e30068fd85..d638a30bb27 100644
--- a/compiler/testData/diagnostics/tests/samConversions/sameCandidatesFromKotlinAndJavaInOneScope.kt
+++ b/compiler/testData/diagnostics/tests/samConversions/sameCandidatesFromKotlinAndJavaInOneScope.kt
@@ -1,5 +1,5 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference +SamConversionForKotlinFunctions +SamConversionPerArgument
+// !LANGUAGE: +SamConversionForKotlinFunctions +SamConversionPerArgument
 // !DIAGNOSTICS: -UNUSED_PARAMETER,-UNUSED_VARIABLE
 
 // FILE: Action.java
diff --git a/compiler/testData/diagnostics/tests/smartCasts/kt32358_1.fir.kt b/compiler/testData/diagnostics/tests/smartCasts/kt32358_1.fir.kt
index 1d8c2ac98ee..1112c6199c5 100644
--- a/compiler/testData/diagnostics/tests/smartCasts/kt32358_1.fir.kt
+++ b/compiler/testData/diagnostics/tests/smartCasts/kt32358_1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 
 class MyChild {
     val nullableString: String? = null
diff --git a/compiler/testData/diagnostics/tests/smartCasts/kt32358_1.kt b/compiler/testData/diagnostics/tests/smartCasts/kt32358_1.kt
index 55b270b0a30..855defef3df 100644
--- a/compiler/testData/diagnostics/tests/smartCasts/kt32358_1.kt
+++ b/compiler/testData/diagnostics/tests/smartCasts/kt32358_1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 
 class MyChild {
     val nullableString: String? = null
diff --git a/compiler/testData/diagnostics/tests/smartCasts/kt32358_2.fir.kt b/compiler/testData/diagnostics/tests/smartCasts/kt32358_2.fir.kt
index a27f856d82d..92fb5fee3fb 100644
--- a/compiler/testData/diagnostics/tests/smartCasts/kt32358_2.fir.kt
+++ b/compiler/testData/diagnostics/tests/smartCasts/kt32358_2.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -OPT_IN_USAGE_ERROR -OPT_IN_USAGE_FUTURE_ERROR -UNUSED_PARAMETER
 
 import kotlin.contracts.*
diff --git a/compiler/testData/diagnostics/tests/smartCasts/kt32358_2.kt b/compiler/testData/diagnostics/tests/smartCasts/kt32358_2.kt
index 6dd08ad8da5..0ec886f3115 100644
--- a/compiler/testData/diagnostics/tests/smartCasts/kt32358_2.kt
+++ b/compiler/testData/diagnostics/tests/smartCasts/kt32358_2.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -OPT_IN_USAGE_ERROR -OPT_IN_USAGE_FUTURE_ERROR -UNUSED_PARAMETER
 
 import kotlin.contracts.*
diff --git a/compiler/testData/diagnostics/tests/smartCasts/kt32358_3.fir.kt b/compiler/testData/diagnostics/tests/smartCasts/kt32358_3.fir.kt
index 0f66f5c8404..10b2279ef5d 100644
--- a/compiler/testData/diagnostics/tests/smartCasts/kt32358_3.fir.kt
+++ b/compiler/testData/diagnostics/tests/smartCasts/kt32358_3.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 // no inline modifier
diff --git a/compiler/testData/diagnostics/tests/smartCasts/kt32358_3.kt b/compiler/testData/diagnostics/tests/smartCasts/kt32358_3.kt
index 398798835b5..8e25b2e2115 100644
--- a/compiler/testData/diagnostics/tests/smartCasts/kt32358_3.kt
+++ b/compiler/testData/diagnostics/tests/smartCasts/kt32358_3.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 // no inline modifier
diff --git a/compiler/testData/diagnostics/tests/syntheticExtensions/javaProperties/PartiallySupportedSyntheticJavaPropertyReference.fir.kt b/compiler/testData/diagnostics/tests/syntheticExtensions/javaProperties/PartiallySupportedSyntheticJavaPropertyReference.fir.kt
index e9211bab3cb..e8962ae225e 100644
--- a/compiler/testData/diagnostics/tests/syntheticExtensions/javaProperties/PartiallySupportedSyntheticJavaPropertyReference.fir.kt
+++ b/compiler/testData/diagnostics/tests/syntheticExtensions/javaProperties/PartiallySupportedSyntheticJavaPropertyReference.fir.kt
@@ -1,4 +1,4 @@
-// !LANGUAGE: +NewInference +ReferencesToSyntheticJavaProperties
+// !LANGUAGE: +ReferencesToSyntheticJavaProperties
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_EXPRESSION
 
 // FILE: KotlinFile.kt
diff --git a/compiler/testData/diagnostics/tests/syntheticExtensions/javaProperties/PartiallySupportedSyntheticJavaPropertyReference.kt b/compiler/testData/diagnostics/tests/syntheticExtensions/javaProperties/PartiallySupportedSyntheticJavaPropertyReference.kt
index eb37f29c6a2..de197972c42 100644
--- a/compiler/testData/diagnostics/tests/syntheticExtensions/javaProperties/PartiallySupportedSyntheticJavaPropertyReference.kt
+++ b/compiler/testData/diagnostics/tests/syntheticExtensions/javaProperties/PartiallySupportedSyntheticJavaPropertyReference.kt
@@ -1,4 +1,4 @@
-// !LANGUAGE: +NewInference +ReferencesToSyntheticJavaProperties
+// !LANGUAGE: +ReferencesToSyntheticJavaProperties
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_EXPRESSION
 
 // FILE: KotlinFile.kt
diff --git a/compiler/testData/diagnostics/tests/typeParameters/implicitNothingAgainstNotNothingExpectedType.fir.kt b/compiler/testData/diagnostics/tests/typeParameters/implicitNothingAgainstNotNothingExpectedType.fir.kt
index 0e594a8c4cd..25d035b20df 100644
--- a/compiler/testData/diagnostics/tests/typeParameters/implicitNothingAgainstNotNothingExpectedType.fir.kt
+++ b/compiler/testData/diagnostics/tests/typeParameters/implicitNothingAgainstNotNothingExpectedType.fir.kt
@@ -1,5 +1,4 @@
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE -UNCHECKED_CAST -UNUSED_EXPRESSION -UNREACHABLE_CODE
-// !LANGUAGE: +NewInference
 
 fun <K> materialize(): K = null as K
 fun <K, T> materializeWithGenericArg(x: T): K = null as K
diff --git a/compiler/testData/diagnostics/tests/typeParameters/implicitNothingAgainstNotNothingExpectedType.kt b/compiler/testData/diagnostics/tests/typeParameters/implicitNothingAgainstNotNothingExpectedType.kt
index 49cc9bb5c47..dc1faf7e17e 100644
--- a/compiler/testData/diagnostics/tests/typeParameters/implicitNothingAgainstNotNothingExpectedType.kt
+++ b/compiler/testData/diagnostics/tests/typeParameters/implicitNothingAgainstNotNothingExpectedType.kt
@@ -1,5 +1,4 @@
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE -UNCHECKED_CAST -UNUSED_EXPRESSION -UNREACHABLE_CODE
-// !LANGUAGE: +NewInference
 
 fun <K> materialize(): K = null as K
 fun <K, T> materializeWithGenericArg(x: T): K = null as K
diff --git a/compiler/testData/diagnostics/tests/varargs/varargViewedAsArray.fir.kt b/compiler/testData/diagnostics/tests/varargs/varargViewedAsArray.fir.kt
index 83342193987..ffa9ea0c94e 100644
--- a/compiler/testData/diagnostics/tests/varargs/varargViewedAsArray.fir.kt
+++ b/compiler/testData/diagnostics/tests/varargs/varargViewedAsArray.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 fun stringVararg(vararg args: String) {}
diff --git a/compiler/testData/diagnostics/tests/varargs/varargViewedAsArray.kt b/compiler/testData/diagnostics/tests/varargs/varargViewedAsArray.kt
index 5a1fc141b2b..bb73f31afe0 100644
--- a/compiler/testData/diagnostics/tests/varargs/varargViewedAsArray.kt
+++ b/compiler/testData/diagnostics/tests/varargs/varargViewedAsArray.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 fun stringVararg(vararg args: String) {}
diff --git a/compiler/testData/diagnostics/testsWithJsStdLib/dynamicTypes/capturedDynamicNI.kt b/compiler/testData/diagnostics/testsWithJsStdLib/dynamicTypes/capturedDynamicNI.kt
index 1cd9bcb521f..211c5a84bac 100644
--- a/compiler/testData/diagnostics/testsWithJsStdLib/dynamicTypes/capturedDynamicNI.kt
+++ b/compiler/testData/diagnostics/testsWithJsStdLib/dynamicTypes/capturedDynamicNI.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // SKIP_TXT
 
 fun case_1(vararg args: dynamic) {
diff --git a/compiler/testData/diagnostics/testsWithJsStdLib/unsafeCastFunctionOnDynamicType.kt b/compiler/testData/diagnostics/testsWithJsStdLib/unsafeCastFunctionOnDynamicType.kt
index 2dfb0e3deff..3f1be190d52 100644
--- a/compiler/testData/diagnostics/testsWithJsStdLib/unsafeCastFunctionOnDynamicType.kt
+++ b/compiler/testData/diagnostics/testsWithJsStdLib/unsafeCastFunctionOnDynamicType.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 
 fun String.toDouble(): Double = (+(this.asDynamic())).unsafeCast<Double>().also {
     if (it.isNaN() && !this.isNaN() || it == 0.0 && this.isBlank())
diff --git a/compiler/testData/diagnostics/testsWithStdLib/coroutines/callableReference/callableReferenceOnUnresolvedLHS.fir.kt b/compiler/testData/diagnostics/testsWithStdLib/coroutines/callableReference/callableReferenceOnUnresolvedLHS.fir.kt
index 65944594df3..e87e181dacf 100644
--- a/compiler/testData/diagnostics/testsWithStdLib/coroutines/callableReference/callableReferenceOnUnresolvedLHS.fir.kt
+++ b/compiler/testData/diagnostics/testsWithStdLib/coroutines/callableReference/callableReferenceOnUnresolvedLHS.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 
 interface Inv
 class Impl : Inv
diff --git a/compiler/testData/diagnostics/testsWithStdLib/coroutines/callableReference/callableReferenceOnUnresolvedLHS.kt b/compiler/testData/diagnostics/testsWithStdLib/coroutines/callableReference/callableReferenceOnUnresolvedLHS.kt
index 366911ccaad..e57f620f6b1 100644
--- a/compiler/testData/diagnostics/testsWithStdLib/coroutines/callableReference/callableReferenceOnUnresolvedLHS.kt
+++ b/compiler/testData/diagnostics/testsWithStdLib/coroutines/callableReference/callableReferenceOnUnresolvedLHS.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 
 interface Inv
 class Impl : Inv
diff --git a/compiler/testData/diagnostics/testsWithStdLib/coroutines/callableReference/suspendConversionForCallableReferences.fir.kt b/compiler/testData/diagnostics/testsWithStdLib/coroutines/callableReference/suspendConversionForCallableReferences.fir.kt
index 5cf8520da78..08f034e8c9b 100644
--- a/compiler/testData/diagnostics/testsWithStdLib/coroutines/callableReference/suspendConversionForCallableReferences.fir.kt
+++ b/compiler/testData/diagnostics/testsWithStdLib/coroutines/callableReference/suspendConversionForCallableReferences.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 inline fun go1(f: () -> String) = f()
diff --git a/compiler/testData/diagnostics/testsWithStdLib/coroutines/callableReference/suspendConversionForCallableReferences.kt b/compiler/testData/diagnostics/testsWithStdLib/coroutines/callableReference/suspendConversionForCallableReferences.kt
index 300952271f2..5755ca9ebdb 100644
--- a/compiler/testData/diagnostics/testsWithStdLib/coroutines/callableReference/suspendConversionForCallableReferences.kt
+++ b/compiler/testData/diagnostics/testsWithStdLib/coroutines/callableReference/suspendConversionForCallableReferences.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 inline fun go1(f: () -> String) = f()
diff --git a/compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/builderInferenceForMaterializeWithExpectedType.kt b/compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/builderInferenceForMaterializeWithExpectedType.kt
index f6d412038ff..f0f4f1fd825 100644
--- a/compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/builderInferenceForMaterializeWithExpectedType.kt
+++ b/compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/builderInferenceForMaterializeWithExpectedType.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE
 
 fun foo(x: List<String>) {}
diff --git a/compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/callableReferenceToASuspendFunction.fir.kt b/compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/callableReferenceToASuspendFunction.fir.kt
index 5daae0900bc..a2d3bc3a55e 100644
--- a/compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/callableReferenceToASuspendFunction.fir.kt
+++ b/compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/callableReferenceToASuspendFunction.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // !OPT_IN: kotlin.RequiresOptIn
 
diff --git a/compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/callableReferenceToASuspendFunction.kt b/compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/callableReferenceToASuspendFunction.kt
index 529a8229ef2..ca34a721060 100644
--- a/compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/callableReferenceToASuspendFunction.kt
+++ b/compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/callableReferenceToASuspendFunction.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // !OPT_IN: kotlin.RequiresOptIn
 
diff --git a/compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/chainCallWithExtensionExplicitTypes.kt b/compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/chainCallWithExtensionExplicitTypes.kt
index 37627755b32..0225e70b428 100644
--- a/compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/chainCallWithExtensionExplicitTypes.kt
+++ b/compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/chainCallWithExtensionExplicitTypes.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // !OPT_IN: kotlin.RequiresOptIn
 
diff --git a/compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/coroutineInferenceWithCapturedTypeVariable.kt b/compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/coroutineInferenceWithCapturedTypeVariable.kt
index 003cbe09722..2f3416adac5 100644
--- a/compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/coroutineInferenceWithCapturedTypeVariable.kt
+++ b/compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/coroutineInferenceWithCapturedTypeVariable.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // !OPT_IN: kotlin.RequiresOptIn
 
diff --git a/compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/elvisOperatorAgainstFlexibleType.kt b/compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/elvisOperatorAgainstFlexibleType.kt
index 84837bd0170..75d3d917bd3 100644
--- a/compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/elvisOperatorAgainstFlexibleType.kt
+++ b/compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/elvisOperatorAgainstFlexibleType.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -UNUSED_PARAMETER
 
 // FILE: Foo.java
diff --git a/compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/kt33542.kt b/compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/kt33542.kt
index 8a26d2389b4..fd83d340e39 100644
--- a/compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/kt33542.kt
+++ b/compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/kt33542.kt
@@ -1,6 +1,5 @@
 // FIR_IDENTICAL
 // !OPT_IN: kotlin.RequiresOptIn
-// !LANGUAGE: +NewInference
 
 import kotlin.experimental.ExperimentalTypeInference
 
diff --git a/compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/kt35306.kt b/compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/kt35306.kt
index 2f3d842878f..4496e2f51a9 100644
--- a/compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/kt35306.kt
+++ b/compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/kt35306.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !OPT_IN: kotlin.RequiresOptIn
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
diff --git a/compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/kt35684.fir.kt b/compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/kt35684.fir.kt
index a1aca0be910..2ec35f51572 100644
--- a/compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/kt35684.fir.kt
+++ b/compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/kt35684.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !OPT_IN: kotlin.RequiresOptIn
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // ISSUE: KT-35684
diff --git a/compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/kt35684.kt b/compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/kt35684.kt
index 2100d11cad7..cde719d0e78 100644
--- a/compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/kt35684.kt
+++ b/compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/kt35684.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !OPT_IN: kotlin.RequiresOptIn
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // ISSUE: KT-35684
diff --git a/compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/kt41164.fir.kt b/compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/kt41164.fir.kt
index d6e11382b39..6883ce52b38 100644
--- a/compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/kt41164.fir.kt
+++ b/compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/kt41164.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -OPT_IN_IS_NOT_ENABLED
 // ISSUE: KT-41164
 
diff --git a/compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/kt41164.kt b/compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/kt41164.kt
index c563929de53..89cb2695cae 100644
--- a/compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/kt41164.kt
+++ b/compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/kt41164.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -OPT_IN_IS_NOT_ENABLED
 // ISSUE: KT-41164
 
diff --git a/compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/nestedLambdaInferenceWithListMap.kt b/compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/nestedLambdaInferenceWithListMap.kt
index 9a6d48d36dd..b00161fd82c 100644
--- a/compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/nestedLambdaInferenceWithListMap.kt
+++ b/compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/nestedLambdaInferenceWithListMap.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 
 val configurations4 = listOf(
     3 to mapOf(
diff --git a/compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/variableCallInsideBuilderFunction.kt b/compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/variableCallInsideBuilderFunction.kt
index d0c3ccdbe25..12a435034b0 100644
--- a/compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/variableCallInsideBuilderFunction.kt
+++ b/compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/variableCallInsideBuilderFunction.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // !OPT_IN: kotlin.RequiresOptIn
 
diff --git a/compiler/testData/diagnostics/testsWithStdLib/coroutines/kt28658.kt b/compiler/testData/diagnostics/testsWithStdLib/coroutines/kt28658.kt
index 8bcd30b41af..d7fbe1b3f74 100644
--- a/compiler/testData/diagnostics/testsWithStdLib/coroutines/kt28658.kt
+++ b/compiler/testData/diagnostics/testsWithStdLib/coroutines/kt28658.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !OPT_IN: kotlin.RequiresOptIn
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_PARAMETER -UNUSED_VARIABLE
 
diff --git a/compiler/testData/diagnostics/testsWithStdLib/coroutines/suspensionPointInMonitorNewInf.kt b/compiler/testData/diagnostics/testsWithStdLib/coroutines/suspensionPointInMonitorNewInf.kt
index 5f91bdbd2fb..84305ec8b7c 100644
--- a/compiler/testData/diagnostics/testsWithStdLib/coroutines/suspensionPointInMonitorNewInf.kt
+++ b/compiler/testData/diagnostics/testsWithStdLib/coroutines/suspensionPointInMonitorNewInf.kt
@@ -1,6 +1,5 @@
 // FIR_IDENTICAL
 // !DIAGNOSTICS: -UNUSED_PARAMETER, -USELESS_IS_CHECK
-// !LANGUAGE: +NewInference
 // SKIP_TXT
 
 import kotlin.concurrent.withLock
diff --git a/compiler/testData/diagnostics/testsWithStdLib/factoryPattern/independentResolutionInLambda.kt b/compiler/testData/diagnostics/testsWithStdLib/factoryPattern/independentResolutionInLambda.kt
index 95e2ff88ad0..8feed0cd8c5 100644
--- a/compiler/testData/diagnostics/testsWithStdLib/factoryPattern/independentResolutionInLambda.kt
+++ b/compiler/testData/diagnostics/testsWithStdLib/factoryPattern/independentResolutionInLambda.kt
@@ -1,5 +1,5 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference +OverloadResolutionByLambdaReturnType
+// !LANGUAGE: +OverloadResolutionByLambdaReturnType
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_EXPRESSION
 // ISSUE: KT-11265
 
diff --git a/compiler/testData/diagnostics/testsWithStdLib/factoryPattern/multipleOverloads_1.kt b/compiler/testData/diagnostics/testsWithStdLib/factoryPattern/multipleOverloads_1.kt
index e3313dc6e0f..daec4a1495c 100644
--- a/compiler/testData/diagnostics/testsWithStdLib/factoryPattern/multipleOverloads_1.kt
+++ b/compiler/testData/diagnostics/testsWithStdLib/factoryPattern/multipleOverloads_1.kt
@@ -1,5 +1,5 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference +OverloadResolutionByLambdaReturnType
+// !LANGUAGE: +OverloadResolutionByLambdaReturnType
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_EXPRESSION -OPT_IN_USAGE -EXPERIMENTAL_UNSIGNED_LITERALS
 // ISSUE: KT-11265
 
diff --git a/compiler/testData/diagnostics/testsWithStdLib/factoryPattern/multipleOverloads_2.kt b/compiler/testData/diagnostics/testsWithStdLib/factoryPattern/multipleOverloads_2.kt
index f6845e2e661..0b635a5ad3b 100644
--- a/compiler/testData/diagnostics/testsWithStdLib/factoryPattern/multipleOverloads_2.kt
+++ b/compiler/testData/diagnostics/testsWithStdLib/factoryPattern/multipleOverloads_2.kt
@@ -1,5 +1,5 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference +OverloadResolutionByLambdaReturnType
+// !LANGUAGE: +OverloadResolutionByLambdaReturnType
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_EXPRESSION -OPT_IN_USAGE -EXPERIMENTAL_UNSIGNED_LITERALS
 // ISSUE: KT-11265
 
diff --git a/compiler/testData/diagnostics/testsWithStdLib/factoryPattern/multipleOverloads_3.kt b/compiler/testData/diagnostics/testsWithStdLib/factoryPattern/multipleOverloads_3.kt
index 07c8d461c4a..19bcca7974e 100644
--- a/compiler/testData/diagnostics/testsWithStdLib/factoryPattern/multipleOverloads_3.kt
+++ b/compiler/testData/diagnostics/testsWithStdLib/factoryPattern/multipleOverloads_3.kt
@@ -1,5 +1,5 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference +OverloadResolutionByLambdaReturnType
+// !LANGUAGE: +OverloadResolutionByLambdaReturnType
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_EXPRESSION -OPT_IN_USAGE -EXPERIMENTAL_UNSIGNED_LITERALS
 // ISSUE: KT-11265
 
diff --git a/compiler/testData/diagnostics/testsWithStdLib/factoryPattern/overloadByLambdaReturnType_disabled.fir.kt b/compiler/testData/diagnostics/testsWithStdLib/factoryPattern/overloadByLambdaReturnType_disabled.fir.kt
index 74096807f9b..1fad67faa22 100644
--- a/compiler/testData/diagnostics/testsWithStdLib/factoryPattern/overloadByLambdaReturnType_disabled.fir.kt
+++ b/compiler/testData/diagnostics/testsWithStdLib/factoryPattern/overloadByLambdaReturnType_disabled.fir.kt
@@ -1,4 +1,4 @@
-// !LANGUAGE: +NewInference -OverloadResolutionByLambdaReturnType
+// !LANGUAGE: -OverloadResolutionByLambdaReturnType
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_EXPRESSION
 // ISSUE: KT-11265
 
diff --git a/compiler/testData/diagnostics/testsWithStdLib/factoryPattern/overloadByLambdaReturnType_disabled.kt b/compiler/testData/diagnostics/testsWithStdLib/factoryPattern/overloadByLambdaReturnType_disabled.kt
index aa9d33be560..802582d1dbf 100644
--- a/compiler/testData/diagnostics/testsWithStdLib/factoryPattern/overloadByLambdaReturnType_disabled.kt
+++ b/compiler/testData/diagnostics/testsWithStdLib/factoryPattern/overloadByLambdaReturnType_disabled.kt
@@ -1,4 +1,4 @@
-// !LANGUAGE: +NewInference -OverloadResolutionByLambdaReturnType
+// !LANGUAGE: -OverloadResolutionByLambdaReturnType
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_EXPRESSION
 // ISSUE: KT-11265
 
diff --git a/compiler/testData/diagnostics/testsWithStdLib/factoryPattern/overloadByLambdaReturnType_enabled.fir.kt b/compiler/testData/diagnostics/testsWithStdLib/factoryPattern/overloadByLambdaReturnType_enabled.fir.kt
index ee2eeda2748..95b116c3abb 100644
--- a/compiler/testData/diagnostics/testsWithStdLib/factoryPattern/overloadByLambdaReturnType_enabled.fir.kt
+++ b/compiler/testData/diagnostics/testsWithStdLib/factoryPattern/overloadByLambdaReturnType_enabled.fir.kt
@@ -1,4 +1,4 @@
-// !LANGUAGE: +NewInference +OverloadResolutionByLambdaReturnType
+// !LANGUAGE: +OverloadResolutionByLambdaReturnType
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_EXPRESSION
 // ISSUE: KT-11265
 
diff --git a/compiler/testData/diagnostics/testsWithStdLib/factoryPattern/overloadByLambdaReturnType_enabled.kt b/compiler/testData/diagnostics/testsWithStdLib/factoryPattern/overloadByLambdaReturnType_enabled.kt
index 571c23e8131..2f8c440240a 100644
--- a/compiler/testData/diagnostics/testsWithStdLib/factoryPattern/overloadByLambdaReturnType_enabled.kt
+++ b/compiler/testData/diagnostics/testsWithStdLib/factoryPattern/overloadByLambdaReturnType_enabled.kt
@@ -1,4 +1,4 @@
-// !LANGUAGE: +NewInference +OverloadResolutionByLambdaReturnType
+// !LANGUAGE: +OverloadResolutionByLambdaReturnType
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_EXPRESSION
 // ISSUE: KT-11265
 
diff --git a/compiler/testData/diagnostics/testsWithStdLib/factoryPattern/overloadByLambdaReturnType_enabled_no_annotation.fir.kt b/compiler/testData/diagnostics/testsWithStdLib/factoryPattern/overloadByLambdaReturnType_enabled_no_annotation.fir.kt
index 083e0063d3a..9db252ee9e0 100644
--- a/compiler/testData/diagnostics/testsWithStdLib/factoryPattern/overloadByLambdaReturnType_enabled_no_annotation.fir.kt
+++ b/compiler/testData/diagnostics/testsWithStdLib/factoryPattern/overloadByLambdaReturnType_enabled_no_annotation.fir.kt
@@ -1,4 +1,4 @@
-// !LANGUAGE: +NewInference +OverloadResolutionByLambdaReturnType
+// !LANGUAGE: +OverloadResolutionByLambdaReturnType
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_EXPRESSION
 // ISSUE: KT-11265
 
diff --git a/compiler/testData/diagnostics/testsWithStdLib/factoryPattern/overloadByLambdaReturnType_enabled_no_annotation.kt b/compiler/testData/diagnostics/testsWithStdLib/factoryPattern/overloadByLambdaReturnType_enabled_no_annotation.kt
index bf4b674420f..137e30ce078 100644
--- a/compiler/testData/diagnostics/testsWithStdLib/factoryPattern/overloadByLambdaReturnType_enabled_no_annotation.kt
+++ b/compiler/testData/diagnostics/testsWithStdLib/factoryPattern/overloadByLambdaReturnType_enabled_no_annotation.kt
@@ -1,4 +1,4 @@
-// !LANGUAGE: +NewInference +OverloadResolutionByLambdaReturnType
+// !LANGUAGE: +OverloadResolutionByLambdaReturnType
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_EXPRESSION
 // ISSUE: KT-11265
 
diff --git a/compiler/testData/diagnostics/testsWithStdLib/factoryPattern/returnFromInlineLambda.kt b/compiler/testData/diagnostics/testsWithStdLib/factoryPattern/returnFromInlineLambda.kt
index 1b7a5e8d96d..895ebf54813 100644
--- a/compiler/testData/diagnostics/testsWithStdLib/factoryPattern/returnFromInlineLambda.kt
+++ b/compiler/testData/diagnostics/testsWithStdLib/factoryPattern/returnFromInlineLambda.kt
@@ -1,5 +1,5 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference +OverloadResolutionByLambdaReturnType
+// !LANGUAGE: +OverloadResolutionByLambdaReturnType
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_EXPRESSION -OPT_IN_USAGE -EXPERIMENTAL_UNSIGNED_LITERALS
 // ISSUE: KT-11265
 
diff --git a/compiler/testData/diagnostics/testsWithStdLib/inference/annotationsForResolve/kt35210.kt b/compiler/testData/diagnostics/testsWithStdLib/inference/annotationsForResolve/kt35210.kt
index 81c71ba8c30..05f4b3a114d 100644
--- a/compiler/testData/diagnostics/testsWithStdLib/inference/annotationsForResolve/kt35210.kt
+++ b/compiler/testData/diagnostics/testsWithStdLib/inference/annotationsForResolve/kt35210.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 @file:Suppress("INVISIBLE_MEMBER", "INVISIBLE_REFERENCE")
diff --git a/compiler/testData/diagnostics/testsWithStdLib/inference/annotationsForResolve/onlyInputTypeAndJava.kt b/compiler/testData/diagnostics/testsWithStdLib/inference/annotationsForResolve/onlyInputTypeAndJava.kt
index 78de9c07579..cdfff5814d3 100644
--- a/compiler/testData/diagnostics/testsWithStdLib/inference/annotationsForResolve/onlyInputTypeAndJava.kt
+++ b/compiler/testData/diagnostics/testsWithStdLib/inference/annotationsForResolve/onlyInputTypeAndJava.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 // FILE: TestBase.java
diff --git a/compiler/testData/diagnostics/testsWithStdLib/inference/annotationsForResolve/onlyInputTypesWarning.fir.kt b/compiler/testData/diagnostics/testsWithStdLib/inference/annotationsForResolve/onlyInputTypesWarning.fir.kt
index ce6cd662ea2..30961f5da6f 100644
--- a/compiler/testData/diagnostics/testsWithStdLib/inference/annotationsForResolve/onlyInputTypesWarning.fir.kt
+++ b/compiler/testData/diagnostics/testsWithStdLib/inference/annotationsForResolve/onlyInputTypesWarning.fir.kt
@@ -1,4 +1,4 @@
-// !LANGUAGE: +NewInference -StrictOnlyInputTypesChecks
+// !LANGUAGE: -StrictOnlyInputTypesChecks
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 @Suppress("INVISIBLE_MEMBER", "INVISIBLE_REFERENCE")
diff --git a/compiler/testData/diagnostics/testsWithStdLib/inference/annotationsForResolve/onlyInputTypesWarning.kt b/compiler/testData/diagnostics/testsWithStdLib/inference/annotationsForResolve/onlyInputTypesWarning.kt
index e6b33118c3b..d0c722f0053 100644
--- a/compiler/testData/diagnostics/testsWithStdLib/inference/annotationsForResolve/onlyInputTypesWarning.kt
+++ b/compiler/testData/diagnostics/testsWithStdLib/inference/annotationsForResolve/onlyInputTypesWarning.kt
@@ -1,4 +1,4 @@
-// !LANGUAGE: +NewInference -StrictOnlyInputTypesChecks
+// !LANGUAGE: -StrictOnlyInputTypesChecks
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 @Suppress("INVISIBLE_MEMBER", "INVISIBLE_REFERENCE")
diff --git a/compiler/testData/diagnostics/testsWithStdLib/inference/delegates/kt31219.kt b/compiler/testData/diagnostics/testsWithStdLib/inference/delegates/kt31219.kt
index 61e8e8e0462..f4c906c6d14 100644
--- a/compiler/testData/diagnostics/testsWithStdLib/inference/delegates/kt31219.kt
+++ b/compiler/testData/diagnostics/testsWithStdLib/inference/delegates/kt31219.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // ISSUE: KT-31219
 
diff --git a/compiler/testData/diagnostics/testsWithStdLib/inference/delegates/kt31679.kt b/compiler/testData/diagnostics/testsWithStdLib/inference/delegates/kt31679.kt
index f5a297d2482..7099dbad1c7 100644
--- a/compiler/testData/diagnostics/testsWithStdLib/inference/delegates/kt31679.kt
+++ b/compiler/testData/diagnostics/testsWithStdLib/inference/delegates/kt31679.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // ISSUE: KT-31679
 
diff --git a/compiler/testData/diagnostics/testsWithStdLib/inference/delegates/kt32249.kt b/compiler/testData/diagnostics/testsWithStdLib/inference/delegates/kt32249.kt
index 1733c035bab..7d68cd343e8 100644
--- a/compiler/testData/diagnostics/testsWithStdLib/inference/delegates/kt32249.kt
+++ b/compiler/testData/diagnostics/testsWithStdLib/inference/delegates/kt32249.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // ISSUE: KT-32249
 
diff --git a/compiler/testData/diagnostics/testsWithStdLib/inference/integerLiterals.fir.kt b/compiler/testData/diagnostics/testsWithStdLib/inference/integerLiterals.fir.kt
index bee5aa0b0e9..1df012d4aaf 100644
--- a/compiler/testData/diagnostics/testsWithStdLib/inference/integerLiterals.fir.kt
+++ b/compiler/testData/diagnostics/testsWithStdLib/inference/integerLiterals.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -USELESS_ELVIS -UNUSED_EXPRESSION
 
 class X {
diff --git a/compiler/testData/diagnostics/testsWithStdLib/inference/integerLiterals.kt b/compiler/testData/diagnostics/testsWithStdLib/inference/integerLiterals.kt
index cdd5c742cfe..3fdb3963986 100644
--- a/compiler/testData/diagnostics/testsWithStdLib/inference/integerLiterals.kt
+++ b/compiler/testData/diagnostics/testsWithStdLib/inference/integerLiterals.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -USELESS_ELVIS -UNUSED_EXPRESSION
 
 class X {
diff --git a/compiler/testData/diagnostics/testsWithStdLib/inference/intersectionInputType.kt b/compiler/testData/diagnostics/testsWithStdLib/inference/intersectionInputType.kt
index a1f3691d2c2..229bfd446ab 100644
--- a/compiler/testData/diagnostics/testsWithStdLib/inference/intersectionInputType.kt
+++ b/compiler/testData/diagnostics/testsWithStdLib/inference/intersectionInputType.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 
 import kotlin.test.assertEquals
 
diff --git a/compiler/testData/diagnostics/testsWithStdLib/inference/kt30292.kt b/compiler/testData/diagnostics/testsWithStdLib/inference/kt30292.kt
index 1acff47b0fc..698a9d800ce 100644
--- a/compiler/testData/diagnostics/testsWithStdLib/inference/kt30292.kt
+++ b/compiler/testData/diagnostics/testsWithStdLib/inference/kt30292.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 
 fun test(ls: List<String>) {
     ls.takeIf(Collection<*>::isNotEmpty)
diff --git a/compiler/testData/diagnostics/testsWithStdLib/inference/kt35847.kt b/compiler/testData/diagnostics/testsWithStdLib/inference/kt35847.kt
index 6a66777e76b..392cc7cd68a 100644
--- a/compiler/testData/diagnostics/testsWithStdLib/inference/kt35847.kt
+++ b/compiler/testData/diagnostics/testsWithStdLib/inference/kt35847.kt
@@ -1,6 +1,5 @@
 // FIR_IDENTICAL
 // SKIP_TXT
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 import kotlin.reflect.KProperty1
diff --git a/compiler/testData/diagnostics/testsWithStdLib/inference/kt36951.fir.kt b/compiler/testData/diagnostics/testsWithStdLib/inference/kt36951.fir.kt
index aea907c3ae8..01b3ec869a5 100644
--- a/compiler/testData/diagnostics/testsWithStdLib/inference/kt36951.fir.kt
+++ b/compiler/testData/diagnostics/testsWithStdLib/inference/kt36951.fir.kt
@@ -1,5 +1,4 @@
 // !JAVAC_EXPECTED_FILE
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 class Base<T : <!CYCLIC_GENERIC_UPPER_BOUND!>T<!>> : HashSet<T>() {
diff --git a/compiler/testData/diagnostics/testsWithStdLib/inference/kt36951.kt b/compiler/testData/diagnostics/testsWithStdLib/inference/kt36951.kt
index 1195daec1e7..17267000a81 100644
--- a/compiler/testData/diagnostics/testsWithStdLib/inference/kt36951.kt
+++ b/compiler/testData/diagnostics/testsWithStdLib/inference/kt36951.kt
@@ -1,5 +1,4 @@
 // !JAVAC_EXPECTED_FILE
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
 class Base<T : <!CYCLIC_GENERIC_UPPER_BOUND!>T<!>> : HashSet<T>() {
diff --git a/compiler/testData/diagnostics/testsWithStdLib/inference/kt37627.fir.kt b/compiler/testData/diagnostics/testsWithStdLib/inference/kt37627.fir.kt
index e6fdb08a48b..3c14e3bb525 100644
--- a/compiler/testData/diagnostics/testsWithStdLib/inference/kt37627.fir.kt
+++ b/compiler/testData/diagnostics/testsWithStdLib/inference/kt37627.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -NAME_SHADOWING -UNUSED_VARIABLE -UNUSED_EXPRESSION
 
 fun foo1(x: Int) {
diff --git a/compiler/testData/diagnostics/testsWithStdLib/inference/kt37627.kt b/compiler/testData/diagnostics/testsWithStdLib/inference/kt37627.kt
index f74d0c326b4..7e002ef13ad 100644
--- a/compiler/testData/diagnostics/testsWithStdLib/inference/kt37627.kt
+++ b/compiler/testData/diagnostics/testsWithStdLib/inference/kt37627.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -NAME_SHADOWING -UNUSED_VARIABLE -UNUSED_EXPRESSION
 
 fun foo1(x: Int) {
diff --git a/compiler/testData/diagnostics/testsWithStdLib/inference/kt38143.kt b/compiler/testData/diagnostics/testsWithStdLib/inference/kt38143.kt
index 81594d30c95..ba6bf1bb067 100644
--- a/compiler/testData/diagnostics/testsWithStdLib/inference/kt38143.kt
+++ b/compiler/testData/diagnostics/testsWithStdLib/inference/kt38143.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE
 
 // Generic interface, nothing interesting here
diff --git a/compiler/testData/diagnostics/testsWithStdLib/inference/recursiveFlexibleAssertions.fir.kt b/compiler/testData/diagnostics/testsWithStdLib/inference/recursiveFlexibleAssertions.fir.kt
index e78fb285be0..a1cb4747fc2 100644
--- a/compiler/testData/diagnostics/testsWithStdLib/inference/recursiveFlexibleAssertions.fir.kt
+++ b/compiler/testData/diagnostics/testsWithStdLib/inference/recursiveFlexibleAssertions.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER, -UNUSED_EXPRESSION
 // Issue: KT-35844
 
diff --git a/compiler/testData/diagnostics/testsWithStdLib/inference/recursiveFlexibleAssertions.kt b/compiler/testData/diagnostics/testsWithStdLib/inference/recursiveFlexibleAssertions.kt
index 889aae036e8..428955d6579 100644
--- a/compiler/testData/diagnostics/testsWithStdLib/inference/recursiveFlexibleAssertions.kt
+++ b/compiler/testData/diagnostics/testsWithStdLib/inference/recursiveFlexibleAssertions.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER, -UNUSED_EXPRESSION
 // Issue: KT-35844
 
diff --git a/compiler/testData/diagnostics/testsWithStdLib/regression/kt34391.kt b/compiler/testData/diagnostics/testsWithStdLib/regression/kt34391.kt
index dbdc019bba5..6c36ebd7e75 100644
--- a/compiler/testData/diagnostics/testsWithStdLib/regression/kt34391.kt
+++ b/compiler/testData/diagnostics/testsWithStdLib/regression/kt34391.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 
 fun main() {
     val list = listOf(A())
diff --git a/compiler/testData/loadJava/compiledKotlin/class/RecursiveGeneric.kt b/compiler/testData/loadJava/compiledKotlin/class/RecursiveGeneric.kt
index 03b3bf31751..35f21b2c562 100644
--- a/compiler/testData/loadJava/compiledKotlin/class/RecursiveGeneric.kt
+++ b/compiler/testData/loadJava/compiledKotlin/class/RecursiveGeneric.kt
@@ -1,5 +1,4 @@
 //ALLOW_AST_ACCESS
-// !LANGUAGE: +NewInference
 package test
 
 interface Rec<R, out T: Rec<R, T>> {
diff --git a/compiler/tests-spec/testData/codegen/box/linked/expressions/built-in-types-and-their-semantics/kotlin.nothing-1/p-1/pos/1.1.kt b/compiler/tests-spec/testData/codegen/box/linked/expressions/built-in-types-and-their-semantics/kotlin.nothing-1/p-1/pos/1.1.kt
index e140186e8ed..e08e172cfc5 100644
--- a/compiler/tests-spec/testData/codegen/box/linked/expressions/built-in-types-and-their-semantics/kotlin.nothing-1/p-1/pos/1.1.kt
+++ b/compiler/tests-spec/testData/codegen/box/linked/expressions/built-in-types-and-their-semantics/kotlin.nothing-1/p-1/pos/1.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // WITH_STDLIB
 
 /*
diff --git a/compiler/tests-spec/testData/codegen/box/linked/expressions/indexing-expressions/p-3/pos/1.5.kt b/compiler/tests-spec/testData/codegen/box/linked/expressions/indexing-expressions/p-3/pos/1.5.kt
index 8213349914a..1c97e89a145 100644
--- a/compiler/tests-spec/testData/codegen/box/linked/expressions/indexing-expressions/p-3/pos/1.5.kt
+++ b/compiler/tests-spec/testData/codegen/box/linked/expressions/indexing-expressions/p-3/pos/1.5.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // WITH_STDLIB
 
 /*
diff --git a/compiler/tests-spec/testData/diagnostics/linked/control--and-data-flow-analysis/control-flow-graph/expressions-1/conditional-expressions/p-1/neg/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/control--and-data-flow-analysis/control-flow-graph/expressions-1/conditional-expressions/p-1/neg/1.1.kt
index 6f05ffc27e6..d078132907a 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/control--and-data-flow-analysis/control-flow-graph/expressions-1/conditional-expressions/p-1/neg/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/control--and-data-flow-analysis/control-flow-graph/expressions-1/conditional-expressions/p-1/neg/1.1.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS:  -IMPLICIT_CAST_TO_ANY -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/control--and-data-flow-analysis/control-flow-graph/expressions-1/conditional-expressions/p-1/neg/1.2.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/control--and-data-flow-analysis/control-flow-graph/expressions-1/conditional-expressions/p-1/neg/1.2.fir.kt
index 8fbb5a65457..ffd3b4d115f 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/control--and-data-flow-analysis/control-flow-graph/expressions-1/conditional-expressions/p-1/neg/1.2.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/control--and-data-flow-analysis/control-flow-graph/expressions-1/conditional-expressions/p-1/neg/1.2.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS:  -IMPLICIT_CAST_TO_ANY -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/control--and-data-flow-analysis/control-flow-graph/expressions-1/conditional-expressions/p-1/neg/1.2.kt b/compiler/tests-spec/testData/diagnostics/linked/control--and-data-flow-analysis/control-flow-graph/expressions-1/conditional-expressions/p-1/neg/1.2.kt
index 60cad0cfc32..44e2ecf1b49 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/control--and-data-flow-analysis/control-flow-graph/expressions-1/conditional-expressions/p-1/neg/1.2.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/control--and-data-flow-analysis/control-flow-graph/expressions-1/conditional-expressions/p-1/neg/1.2.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS:  -IMPLICIT_CAST_TO_ANY -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/control--and-data-flow-analysis/control-flow-graph/expressions-1/conditional-expressions/p-1/neg/1.3.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/control--and-data-flow-analysis/control-flow-graph/expressions-1/conditional-expressions/p-1/neg/1.3.fir.kt
index 35efb12ef3b..9ca8f8a952b 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/control--and-data-flow-analysis/control-flow-graph/expressions-1/conditional-expressions/p-1/neg/1.3.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/control--and-data-flow-analysis/control-flow-graph/expressions-1/conditional-expressions/p-1/neg/1.3.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNREACHABLE_CODE -IMPLICIT_CAST_TO_ANY -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/control--and-data-flow-analysis/control-flow-graph/expressions-1/conditional-expressions/p-1/neg/1.3.kt b/compiler/tests-spec/testData/diagnostics/linked/control--and-data-flow-analysis/control-flow-graph/expressions-1/conditional-expressions/p-1/neg/1.3.kt
index 23a64d72380..5ea9f50d29c 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/control--and-data-flow-analysis/control-flow-graph/expressions-1/conditional-expressions/p-1/neg/1.3.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/control--and-data-flow-analysis/control-flow-graph/expressions-1/conditional-expressions/p-1/neg/1.3.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNREACHABLE_CODE -IMPLICIT_CAST_TO_ANY -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/control--and-data-flow-analysis/control-flow-graph/expressions-1/conditional-expressions/p-1/neg/1.4.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/control--and-data-flow-analysis/control-flow-graph/expressions-1/conditional-expressions/p-1/neg/1.4.fir.kt
index 8c4f6483641..2233e33d031 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/control--and-data-flow-analysis/control-flow-graph/expressions-1/conditional-expressions/p-1/neg/1.4.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/control--and-data-flow-analysis/control-flow-graph/expressions-1/conditional-expressions/p-1/neg/1.4.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNREACHABLE_CODE -IMPLICIT_CAST_TO_ANY -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/control--and-data-flow-analysis/control-flow-graph/expressions-1/conditional-expressions/p-1/neg/1.4.kt b/compiler/tests-spec/testData/diagnostics/linked/control--and-data-flow-analysis/control-flow-graph/expressions-1/conditional-expressions/p-1/neg/1.4.kt
index 19da53b5c93..db2148dc7ff 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/control--and-data-flow-analysis/control-flow-graph/expressions-1/conditional-expressions/p-1/neg/1.4.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/control--and-data-flow-analysis/control-flow-graph/expressions-1/conditional-expressions/p-1/neg/1.4.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNREACHABLE_CODE -IMPLICIT_CAST_TO_ANY -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/control--and-data-flow-analysis/control-flow-graph/expressions-1/conditional-expressions/p-1/neg/2.1.kt b/compiler/tests-spec/testData/diagnostics/linked/control--and-data-flow-analysis/control-flow-graph/expressions-1/conditional-expressions/p-1/neg/2.1.kt
index 4d4e69d8302..ec689171331 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/control--and-data-flow-analysis/control-flow-graph/expressions-1/conditional-expressions/p-1/neg/2.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/control--and-data-flow-analysis/control-flow-graph/expressions-1/conditional-expressions/p-1/neg/2.1.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/control--and-data-flow-analysis/control-flow-graph/expressions-1/conditional-expressions/p-1/pos/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/control--and-data-flow-analysis/control-flow-graph/expressions-1/conditional-expressions/p-1/pos/1.1.kt
index d387d2cfb65..f7dcd710e98 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/control--and-data-flow-analysis/control-flow-graph/expressions-1/conditional-expressions/p-1/pos/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/control--and-data-flow-analysis/control-flow-graph/expressions-1/conditional-expressions/p-1/pos/1.1.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -DEBUG_INFO_SMARTCAST
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/control--and-data-flow-analysis/control-flow-graph/expressions-1/conditional-expressions/p-1/pos/1.2.kt b/compiler/tests-spec/testData/diagnostics/linked/control--and-data-flow-analysis/control-flow-graph/expressions-1/conditional-expressions/p-1/pos/1.2.kt
index ab25c3a0622..c478a3156ac 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/control--and-data-flow-analysis/control-flow-graph/expressions-1/conditional-expressions/p-1/pos/1.2.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/control--and-data-flow-analysis/control-flow-graph/expressions-1/conditional-expressions/p-1/pos/1.2.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -IMPLICIT_CAST_TO_ANY -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -DEBUG_INFO_SMARTCAST
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/control--and-data-flow-analysis/control-flow-graph/expressions-1/conditional-expressions/p-1/pos/2.1.kt b/compiler/tests-spec/testData/diagnostics/linked/control--and-data-flow-analysis/control-flow-graph/expressions-1/conditional-expressions/p-1/pos/2.1.kt
index 8b5ddb36b92..0500d42eb33 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/control--and-data-flow-analysis/control-flow-graph/expressions-1/conditional-expressions/p-1/pos/2.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/control--and-data-flow-analysis/control-flow-graph/expressions-1/conditional-expressions/p-1/pos/2.1.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -DEBUG_INFO_SMARTCAST
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-1/neg/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-1/neg/1.1.fir.kt
index b596dfedc4a..7a8d1a9bf5b 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-1/neg/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-1/neg/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-1/neg/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-1/neg/1.1.kt
index 5a226bbf338..f41f808b392 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-1/neg/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-1/neg/1.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-1/neg/2.1.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-1/neg/2.1.kt
index dab3ac541aa..f5ed6071440 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-1/neg/2.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-1/neg/2.1.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-1/pos/2.1.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-1/pos/2.1.kt
index 30b87ddea60..c0350e8d76b 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-1/pos/2.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-1/pos/2.1.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.1.fir.kt
index 374f07d6606..6ea009b730a 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.1.kt
index d599f16c485..a40a78fbea1 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.10.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.10.kt
index 75abc937006..87cb685a210 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.10.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.10.kt
@@ -1,5 +1,5 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference +ProhibitInvisibleAbstractMethodsInSuperclasses
+// !LANGUAGE: +ProhibitInvisibleAbstractMethodsInSuperclasses
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 // FULL_JDK
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.2.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.2.fir.kt
index ca030a3ca1e..3789edd06c0 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.2.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.2.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.2.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.2.kt
index fb9726d1c7a..363efd8d8dd 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.2.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.2.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.3.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.3.fir.kt
index 46120b76c07..34b0dcb2934 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.3.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.3.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.3.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.3.kt
index 04fa093168c..2731929e9e6 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.3.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.3.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.4.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.4.fir.kt
index 335f474483d..8fe41307dae 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.4.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.4.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 // FULL_JDK
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.4.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.4.kt
index 6e251ff74d8..8c1812fa0cf 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.4.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.4.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 // FULL_JDK
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.5.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.5.fir.kt
index e10adc20e78..f0f539eb7ea 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.5.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.5.fir.kt
@@ -1,4 +1,4 @@
-// !LANGUAGE: +NewInference +ProhibitInvisibleAbstractMethodsInSuperclasses
+// !LANGUAGE: +ProhibitInvisibleAbstractMethodsInSuperclasses
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 // FULL_JDK
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.5.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.5.kt
index 574680809de..53607182d9a 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.5.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.5.kt
@@ -1,4 +1,4 @@
-// !LANGUAGE: +NewInference +ProhibitInvisibleAbstractMethodsInSuperclasses
+// !LANGUAGE: +ProhibitInvisibleAbstractMethodsInSuperclasses
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 // FULL_JDK
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.6.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.6.fir.kt
index e07d532bfb4..02b32cf6360 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.6.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.6.fir.kt
@@ -1,4 +1,4 @@
-// !LANGUAGE: +NewInference +ProhibitInvisibleAbstractMethodsInSuperclasses
+// !LANGUAGE: +ProhibitInvisibleAbstractMethodsInSuperclasses
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 // FULL_JDK
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.6.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.6.kt
index b49f96082c5..49c2240bacd 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.6.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.6.kt
@@ -1,4 +1,4 @@
-// !LANGUAGE: +NewInference +ProhibitInvisibleAbstractMethodsInSuperclasses
+// !LANGUAGE: +ProhibitInvisibleAbstractMethodsInSuperclasses
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 // FULL_JDK
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.7.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.7.fir.kt
index 5d2288d60c5..6f6c29de10c 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.7.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.7.fir.kt
@@ -1,4 +1,4 @@
-// !LANGUAGE: +NewInference +ProhibitInvisibleAbstractMethodsInSuperclasses
+// !LANGUAGE: +ProhibitInvisibleAbstractMethodsInSuperclasses
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 // FULL_JDK
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.7.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.7.kt
index a849aff2f42..132cb6dde82 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.7.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.7.kt
@@ -1,4 +1,4 @@
-// !LANGUAGE: +NewInference +ProhibitInvisibleAbstractMethodsInSuperclasses
+// !LANGUAGE: +ProhibitInvisibleAbstractMethodsInSuperclasses
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 // FULL_JDK
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.8.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.8.fir.kt
index 4f73e6718d2..88f4cc89ab8 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.8.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.8.fir.kt
@@ -1,4 +1,4 @@
-// !LANGUAGE: +NewInference +ProhibitInvisibleAbstractMethodsInSuperclasses
+// !LANGUAGE: +ProhibitInvisibleAbstractMethodsInSuperclasses
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 // FULL_JDK
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.8.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.8.kt
index 1a2b0c8287b..28733faecbf 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.8.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.8.kt
@@ -1,4 +1,4 @@
-// !LANGUAGE: +NewInference +ProhibitInvisibleAbstractMethodsInSuperclasses
+// !LANGUAGE: +ProhibitInvisibleAbstractMethodsInSuperclasses
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 // FULL_JDK
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.9.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.9.fir.kt
index a58e4d5e4e2..2f819cb7a03 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.9.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.9.fir.kt
@@ -1,4 +1,4 @@
-// !LANGUAGE: +NewInference +ProhibitInvisibleAbstractMethodsInSuperclasses
+// !LANGUAGE: +ProhibitInvisibleAbstractMethodsInSuperclasses
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 // FULL_JDK
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.9.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.9.kt
index 3fca98e7c3c..dda98f78e0d 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.9.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.9.kt
@@ -1,4 +1,4 @@
-// !LANGUAGE: +NewInference +ProhibitInvisibleAbstractMethodsInSuperclasses
+// !LANGUAGE: +ProhibitInvisibleAbstractMethodsInSuperclasses
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 // FULL_JDK
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/pos/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/pos/1.1.kt
index cf0fe1d0724..2ed6df746bc 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/pos/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/pos/1.1.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/pos/1.2.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/pos/1.2.fir.kt
index c16b9d97477..d537e1e6941 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/pos/1.2.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/pos/1.2.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/pos/1.2.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/pos/1.2.kt
index b91210c2a92..92630d3aad7 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/pos/1.2.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/pos/1.2.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/pos/1.3.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/pos/1.3.fir.kt
index a7510d58b1d..57061e8f587 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/pos/1.3.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/pos/1.3.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/pos/1.3.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/pos/1.3.kt
index 77ea7bb4160..d7d0d1e6d63 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/pos/1.3.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/pos/1.3.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/pos/1.4.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/pos/1.4.kt
index b7f4e96b56f..d13a9c7fd1a 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/pos/1.4.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/pos/1.4.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-4/pos/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-4/pos/1.1.fir.kt
index 3485fbde8da..3cfa6295286 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-4/pos/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-4/pos/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-4/pos/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-4/pos/1.1.kt
index 20ac31ce8bc..e59d2912f6d 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-4/pos/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-4/pos/1.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/neg/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/neg/1.1.fir.kt
index 50816995c33..ad16d231f7b 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/neg/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/neg/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/neg/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/neg/1.1.kt
index c5e5c24c1f2..fe7e1daec38 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/neg/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/neg/1.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/neg/1.2.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/neg/1.2.fir.kt
index 8685ab644ab..15e6061f61d 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/neg/1.2.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/neg/1.2.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/neg/1.2.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/neg/1.2.kt
index 72c02b44358..26de64c2fd1 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/neg/1.2.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/neg/1.2.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/neg/2.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/neg/2.1.fir.kt
index 6185e43e43c..151b6c3dfb7 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/neg/2.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/neg/2.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/neg/2.1.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/neg/2.1.kt
index 2550c6bcd1b..175ed8ead5d 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/neg/2.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/neg/2.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/neg/3.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/neg/3.1.fir.kt
index aeaa76c92d4..e868ab102a8 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/neg/3.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/neg/3.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/neg/3.1.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/neg/3.1.kt
index 7527cf009ad..36edc8f0972 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/neg/3.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/neg/3.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/1.1.fir.kt
index aab5a27ca4a..801763b10f9 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/1.1.kt
index acfc5d704df..6af9f4dd57a 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/1.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/1.2.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/1.2.fir.kt
index fa35042556e..f413295e4b8 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/1.2.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/1.2.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/1.2.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/1.2.kt
index 1ff962ccdd8..063b56de028 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/1.2.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/1.2.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/1.3.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/1.3.fir.kt
index 59f6c470b7c..e07181ba0ee 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/1.3.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/1.3.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/1.3.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/1.3.kt
index eb1e6d638ed..5259de666dd 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/1.3.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/1.3.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/1.4.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/1.4.fir.kt
index 8fd5ff80285..f864fd03e30 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/1.4.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/1.4.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/1.4.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/1.4.kt
index c19988f35af..2f4a80457bb 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/1.4.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/1.4.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/1.5.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/1.5.fir.kt
index 8fd5ff80285..f864fd03e30 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/1.5.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/1.5.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/1.5.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/1.5.kt
index 75d1cee1021..93583924297 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/1.5.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/1.5.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/2.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/2.1.fir.kt
index b0bfe1d0eb7..7b8a86ddaef 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/2.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/2.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNRESOLVED_REFERENCE -UNREACHABLE_CODE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/2.1.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/2.1.kt
index 3ddd15c7745..84701024189 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/2.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/2.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNRESOLVED_REFERENCE -UNREACHABLE_CODE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/2.2.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/2.2.fir.kt
index 63e35715fc7..989bdad624d 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/2.2.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/2.2.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNRESOLVED_REFERENCE -UNREACHABLE_CODE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/2.2.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/2.2.kt
index c3aaa005283..3f21a39e957 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/2.2.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/2.2.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNRESOLVED_REFERENCE -UNREACHABLE_CODE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/2.3.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/2.3.fir.kt
index 3db2afd8d3a..a0de45e0881 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/2.3.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/2.3.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNRESOLVED_REFERENCE -UNREACHABLE_CODE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/2.3.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/2.3.kt
index 5303698ca48..d389e2deb4e 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/2.3.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/2.3.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNRESOLVED_REFERENCE -UNREACHABLE_CODE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/2.4.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/2.4.fir.kt
index ec2d5c3d65c..62f5fb4ac32 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/2.4.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/2.4.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_EXPRESSION -UNREACHABLE_CODE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/2.4.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/2.4.kt
index 297c8a6761f..72db51b24a4 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/2.4.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/2.4.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_EXPRESSION -UNREACHABLE_CODE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/3.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/3.1.fir.kt
index 5c011c5653f..8ea60cc0f24 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/3.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/3.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNREACHABLE_CODE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/3.1.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/3.1.kt
index 86600849fd8..b0331d97045 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/3.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/3.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNREACHABLE_CODE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/3.2.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/3.2.fir.kt
index 3e5c2d614ba..c3db2e22ed8 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/3.2.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/3.2.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/3.2.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/3.2.kt
index 727f23799fc..398d2f2fc0b 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/3.2.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/3.2.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/3.3.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/3.3.fir.kt
index 43e90a9e5ec..a65e01cc1d9 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/3.3.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/3.3.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/3.3.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/3.3.kt
index 445865071af..78aaa459f25 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/3.3.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/3.3.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/3.4.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/3.4.fir.kt
index 611a5acb8ee..a82987c406e 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/3.4.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/3.4.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/3.4.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/3.4.kt
index 37edee3a754..bf4ffbbae37 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/3.4.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/constructor-declaration/p-5/pos/3.4.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/property-declaration/local-property-declaration/p-1/neg/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/property-declaration/local-property-declaration/p-1/neg/1.1.fir.kt
index 1ba0d529541..c5c213aedcb 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/property-declaration/local-property-declaration/p-1/neg/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/property-declaration/local-property-declaration/p-1/neg/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNREACHABLE_CODE -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/declarations/property-declaration/local-property-declaration/p-1/neg/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/declarations/property-declaration/local-property-declaration/p-1/neg/1.1.kt
index c4d6b3c6729..eca5b52fece 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/declarations/property-declaration/local-property-declaration/p-1/neg/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/declarations/property-declaration/local-property-declaration/p-1/neg/1.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNREACHABLE_CODE -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/additive-expression/p-4/pos/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/additive-expression/p-4/pos/1.1.fir.kt
index a191487dca5..c981b892208 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/additive-expression/p-4/pos/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/additive-expression/p-4/pos/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/additive-expression/p-4/pos/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/additive-expression/p-4/pos/1.1.kt
index 89e434a3352..cd4a1bc71d3 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/additive-expression/p-4/pos/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/additive-expression/p-4/pos/1.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/built-in-types-and-their-semantics/kotlin.nothing-1/p-1/pos/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/built-in-types-and-their-semantics/kotlin.nothing-1/p-1/pos/1.1.fir.kt
index a271950dd6c..55a1163200e 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/built-in-types-and-their-semantics/kotlin.nothing-1/p-1/pos/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/built-in-types-and-their-semantics/kotlin.nothing-1/p-1/pos/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/built-in-types-and-their-semantics/kotlin.nothing-1/p-1/pos/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/built-in-types-and-their-semantics/kotlin.nothing-1/p-1/pos/1.1.kt
index 2e56582c7f5..146d05dcf11 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/built-in-types-and-their-semantics/kotlin.nothing-1/p-1/pos/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/built-in-types-and-their-semantics/kotlin.nothing-1/p-1/pos/1.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/built-in-types-and-their-semantics/kotlin.unit/p-1/pos/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/built-in-types-and-their-semantics/kotlin.unit/p-1/pos/1.1.kt
index 52a9ecbc5bb..487aec39f67 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/built-in-types-and-their-semantics/kotlin.unit/p-1/pos/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/built-in-types-and-their-semantics/kotlin.unit/p-1/pos/1.1.kt
@@ -1,6 +1,5 @@
 // FIR_IDENTICAL
 // !DIAGNOSTICS: -UNUSED_VARIABLE -UNUSED_PARAMETER
-// !LANGUAGE: +NewInference
 // SKIP_TXT
 
 /*
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/comparison-expressions/p-1/neg/2.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/comparison-expressions/p-1/neg/2.1.fir.kt
index c9031ae14e1..873102785fa 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/comparison-expressions/p-1/neg/2.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/comparison-expressions/p-1/neg/2.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/comparison-expressions/p-1/neg/2.1.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/comparison-expressions/p-1/neg/2.1.kt
index 8340150cc27..918fe49c42a 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/comparison-expressions/p-1/neg/2.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/comparison-expressions/p-1/neg/2.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/comparison-expressions/p-4/neg/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/comparison-expressions/p-4/neg/1.1.fir.kt
index 5bb5af05cdd..2222d1ed97a 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/comparison-expressions/p-4/neg/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/comparison-expressions/p-4/neg/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/comparison-expressions/p-4/neg/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/comparison-expressions/p-4/neg/1.1.kt
index 809181b0f9e..2fd53352938 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/comparison-expressions/p-4/neg/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/comparison-expressions/p-4/neg/1.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/comparison-expressions/p-5/pos/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/comparison-expressions/p-5/pos/1.1.kt
index 1c80d146ccc..ed2e7818446 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/comparison-expressions/p-5/pos/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/comparison-expressions/p-5/pos/1.1.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/conditional-expression/p-6/neg/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/conditional-expression/p-6/neg/1.1.fir.kt
index 541e96bbd41..325524757a6 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/conditional-expression/p-6/neg/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/conditional-expression/p-6/neg/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 // FULL_JDK
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/conditional-expression/p-6/neg/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/conditional-expression/p-6/neg/1.1.kt
index 2ebaa0fc177..f530ef6c991 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/conditional-expression/p-6/neg/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/conditional-expression/p-6/neg/1.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 // FULL_JDK
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/conditional-expression/p-6/pos/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/conditional-expression/p-6/pos/1.1.kt
index bad8eea7b7f..f6032140bee 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/conditional-expression/p-6/pos/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/conditional-expression/p-6/pos/1.1.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNREACHABLE_CODE -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 // FULL_JDK
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/constant-literals/boolean-literals/p-1/neg/2.1.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/constant-literals/boolean-literals/p-1/neg/2.1.kt
index a7287caf68d..f24afbe4905 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/constant-literals/boolean-literals/p-1/neg/2.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/constant-literals/boolean-literals/p-1/neg/2.1.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/constant-literals/boolean-literals/p-1/pos/2.1.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/constant-literals/boolean-literals/p-1/pos/2.1.kt
index 6f3ecabb2a7..28b9eca883e 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/constant-literals/boolean-literals/p-1/pos/2.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/constant-literals/boolean-literals/p-1/pos/2.1.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/constant-literals/character-literals/p-1/neg/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/constant-literals/character-literals/p-1/neg/1.1.kt
index 4a37c8b5a35..69d064a34b1 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/constant-literals/character-literals/p-1/neg/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/constant-literals/character-literals/p-1/neg/1.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/constant-literals/character-literals/p-1/pos/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/constant-literals/character-literals/p-1/pos/1.1.kt
index fabc8b82673..4c18dc67fee 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/constant-literals/character-literals/p-1/pos/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/constant-literals/character-literals/p-1/pos/1.1.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/constant-literals/character-literals/p-4/neg/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/constant-literals/character-literals/p-4/neg/1.1.fir.kt
index f1ec0f44246..ea0c2c23a56 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/constant-literals/character-literals/p-4/neg/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/constant-literals/character-literals/p-4/neg/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/constant-literals/character-literals/p-4/neg/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/constant-literals/character-literals/p-4/neg/1.1.kt
index 89ac5b8ad6b..6adc4247ad7 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/constant-literals/character-literals/p-4/neg/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/constant-literals/character-literals/p-4/neg/1.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/constant-literals/character-literals/p-4/pos/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/constant-literals/character-literals/p-4/pos/1.1.kt
index ca6fc037ba7..9cfa947bb7b 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/constant-literals/character-literals/p-4/pos/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/constant-literals/character-literals/p-4/pos/1.1.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/constant-literals/character-literals/p-4/pos/1.2.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/constant-literals/character-literals/p-4/pos/1.2.kt
index 501a226f180..51651079d25 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/constant-literals/character-literals/p-4/pos/1.2.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/constant-literals/character-literals/p-4/pos/1.2.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/elvis-operator-expression/p-3/pos/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/elvis-operator-expression/p-3/pos/1.1.fir.kt
index b5c9a011d93..c7663089037 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/elvis-operator-expression/p-3/pos/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/elvis-operator-expression/p-3/pos/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNREACHABLE_CODE -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/elvis-operator-expression/p-3/pos/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/elvis-operator-expression/p-3/pos/1.1.kt
index d98192d80f0..4e1e08b72bb 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/elvis-operator-expression/p-3/pos/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/elvis-operator-expression/p-3/pos/1.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNREACHABLE_CODE -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/equality-expressions/value-equality-expressions/p-3/pos/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/equality-expressions/value-equality-expressions/p-3/pos/1.1.kt
index 30d609f4675..8c4ec82bb55 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/equality-expressions/value-equality-expressions/p-3/pos/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/equality-expressions/value-equality-expressions/p-3/pos/1.1.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/jump-expressions/break-expression/p-1/neg/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/jump-expressions/break-expression/p-1/neg/1.1.fir.kt
index 0223b1726cc..1948c55a685 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/jump-expressions/break-expression/p-1/neg/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/jump-expressions/break-expression/p-1/neg/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/jump-expressions/break-expression/p-1/neg/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/jump-expressions/break-expression/p-1/neg/1.1.kt
index 07e51be8cec..8cccd93406a 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/jump-expressions/break-expression/p-1/neg/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/jump-expressions/break-expression/p-1/neg/1.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/jump-expressions/continue-expression/p-1/neg/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/jump-expressions/continue-expression/p-1/neg/1.1.fir.kt
index e277a32f47e..526f7561514 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/jump-expressions/continue-expression/p-1/neg/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/jump-expressions/continue-expression/p-1/neg/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/jump-expressions/continue-expression/p-1/neg/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/jump-expressions/continue-expression/p-1/neg/1.1.kt
index d05bec1e66a..1bdcd2a245c 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/jump-expressions/continue-expression/p-1/neg/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/jump-expressions/continue-expression/p-1/neg/1.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/jump-expressions/p-2/pos/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/jump-expressions/p-2/pos/1.1.kt
index e16573bc94c..8e8344c2800 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/jump-expressions/p-2/pos/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/jump-expressions/p-2/pos/1.1.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -UNREACHABLE_CODE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/jump-expressions/return-expressions/p-1/pos/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/jump-expressions/return-expressions/p-1/pos/1.1.fir.kt
index 8c8d31fb44e..439257d7420 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/jump-expressions/return-expressions/p-1/pos/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/jump-expressions/return-expressions/p-1/pos/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/jump-expressions/return-expressions/p-1/pos/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/jump-expressions/return-expressions/p-1/pos/1.1.kt
index c54ad56feba..d482e177ff7 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/jump-expressions/return-expressions/p-1/pos/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/jump-expressions/return-expressions/p-1/pos/1.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/jump-expressions/return-expressions/p-4/neg/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/jump-expressions/return-expressions/p-4/neg/1.1.fir.kt
index 50fe1c4342d..bbc290f75e9 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/jump-expressions/return-expressions/p-4/neg/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/jump-expressions/return-expressions/p-4/neg/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/jump-expressions/return-expressions/p-4/neg/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/jump-expressions/return-expressions/p-4/neg/1.1.kt
index ff87cfc3551..1640cb0a444 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/jump-expressions/return-expressions/p-4/neg/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/jump-expressions/return-expressions/p-4/neg/1.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/logical-conjunction-expression/p-2/neg/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/logical-conjunction-expression/p-2/neg/1.1.fir.kt
index f7490adf061..815121358e0 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/logical-conjunction-expression/p-2/neg/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/logical-conjunction-expression/p-2/neg/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/logical-conjunction-expression/p-2/neg/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/logical-conjunction-expression/p-2/neg/1.1.kt
index 3494c952b4f..e02dab4315b 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/logical-conjunction-expression/p-2/neg/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/logical-conjunction-expression/p-2/neg/1.1.kt
@@ -1,5 +1,4 @@
 // FIR_IDE_IGNORE
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/logical-conjunction-expression/p-2/pos/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/logical-conjunction-expression/p-2/pos/1.1.fir.kt
index 7f26a7df57f..1f4eb04e27c 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/logical-conjunction-expression/p-2/pos/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/logical-conjunction-expression/p-2/pos/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/logical-conjunction-expression/p-2/pos/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/logical-conjunction-expression/p-2/pos/1.1.kt
index c155de00645..aad044393f1 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/logical-conjunction-expression/p-2/pos/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/logical-conjunction-expression/p-2/pos/1.1.kt
@@ -1,5 +1,4 @@
 // FIR_IDE_IGNORE
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/logical-disjunction-expression/p-2/neg/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/logical-disjunction-expression/p-2/neg/1.1.fir.kt
index 8b119912020..a0c31733d9f 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/logical-disjunction-expression/p-2/neg/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/logical-disjunction-expression/p-2/neg/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/logical-disjunction-expression/p-2/neg/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/logical-disjunction-expression/p-2/neg/1.1.kt
index 6d98e62a41c..c583bb351f3 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/logical-disjunction-expression/p-2/neg/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/logical-disjunction-expression/p-2/neg/1.1.kt
@@ -1,5 +1,4 @@
 // FIR_IDE_IGNORE
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/logical-disjunction-expression/p-2/pos/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/logical-disjunction-expression/p-2/pos/1.1.fir.kt
index b5afa8682b5..730fdc3fac1 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/logical-disjunction-expression/p-2/pos/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/logical-disjunction-expression/p-2/pos/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/logical-disjunction-expression/p-2/pos/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/logical-disjunction-expression/p-2/pos/1.1.kt
index f733842d59f..3da74d3186d 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/logical-disjunction-expression/p-2/pos/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/logical-disjunction-expression/p-2/pos/1.1.kt
@@ -1,5 +1,4 @@
 // FIR_IDE_IGNORE
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/multiplicative-expression/p-5/pos/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/multiplicative-expression/p-5/pos/1.1.fir.kt
index e90fc1a6d2e..56506a7ca0b 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/multiplicative-expression/p-5/pos/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/multiplicative-expression/p-5/pos/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/multiplicative-expression/p-5/pos/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/multiplicative-expression/p-5/pos/1.1.kt
index a8eefb3bcd0..0cc708259ae 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/multiplicative-expression/p-5/pos/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/multiplicative-expression/p-5/pos/1.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/not-null-assertion-expression/p-2/pos/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/not-null-assertion-expression/p-2/pos/1.1.fir.kt
index 43c6afbf0c1..b74a07af4a5 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/not-null-assertion-expression/p-2/pos/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/not-null-assertion-expression/p-2/pos/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNREACHABLE_CODE -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/not-null-assertion-expression/p-2/pos/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/not-null-assertion-expression/p-2/pos/1.1.kt
index 4ff4a451d85..47caa0c1d9c 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/not-null-assertion-expression/p-2/pos/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/not-null-assertion-expression/p-2/pos/1.1.kt
@@ -1,5 +1,4 @@
 // FIR_IDE_IGNORE
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNREACHABLE_CODE -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/not-null-assertion-expression/p-3/pos/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/not-null-assertion-expression/p-3/pos/1.1.fir.kt
index 037b81acd5b..a44ddf9c01e 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/not-null-assertion-expression/p-3/pos/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/not-null-assertion-expression/p-3/pos/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNREACHABLE_CODE -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/not-null-assertion-expression/p-3/pos/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/not-null-assertion-expression/p-3/pos/1.1.kt
index 28479e6cec3..563903b1d29 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/not-null-assertion-expression/p-3/pos/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/not-null-assertion-expression/p-3/pos/1.1.kt
@@ -1,5 +1,4 @@
 // FIR_IDE_IGNORE
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNREACHABLE_CODE -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/prefix-expressions/logical-not-expression/p-3/pos/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/prefix-expressions/logical-not-expression/p-3/pos/1.1.kt
index f4abf733b5f..0b712489cd1 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/prefix-expressions/logical-not-expression/p-3/pos/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/prefix-expressions/logical-not-expression/p-3/pos/1.1.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/prefix-expressions/prefix-decrement-expression/p-4/neg/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/prefix-expressions/prefix-decrement-expression/p-4/neg/1.1.fir.kt
index f65eea5b8f7..8fcf513a259 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/prefix-expressions/prefix-decrement-expression/p-4/neg/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/prefix-expressions/prefix-decrement-expression/p-4/neg/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/prefix-expressions/prefix-decrement-expression/p-4/neg/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/prefix-expressions/prefix-decrement-expression/p-4/neg/1.1.kt
index 2c4bc9a0523..62a55cbaa08 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/prefix-expressions/prefix-decrement-expression/p-4/neg/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/prefix-expressions/prefix-decrement-expression/p-4/neg/1.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/prefix-expressions/prefix-decrement-expression/p-5/neg/2.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/prefix-expressions/prefix-decrement-expression/p-5/neg/2.1.fir.kt
index ef122218f1e..08e69d30681 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/prefix-expressions/prefix-decrement-expression/p-5/neg/2.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/prefix-expressions/prefix-decrement-expression/p-5/neg/2.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/prefix-expressions/prefix-decrement-expression/p-5/neg/2.1.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/prefix-expressions/prefix-decrement-expression/p-5/neg/2.1.kt
index cef5cc91cf9..6671f4e471e 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/prefix-expressions/prefix-decrement-expression/p-5/neg/2.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/prefix-expressions/prefix-decrement-expression/p-5/neg/2.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/prefix-expressions/prefix-increment-expression/p-4/neg/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/prefix-expressions/prefix-increment-expression/p-4/neg/1.1.fir.kt
index 7ecddd6a5a7..2533b04b64d 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/prefix-expressions/prefix-increment-expression/p-4/neg/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/prefix-expressions/prefix-increment-expression/p-4/neg/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/prefix-expressions/prefix-increment-expression/p-4/neg/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/prefix-expressions/prefix-increment-expression/p-4/neg/1.1.kt
index dc10aaac6c0..5982e4dd3fa 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/prefix-expressions/prefix-increment-expression/p-4/neg/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/prefix-expressions/prefix-increment-expression/p-4/neg/1.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/prefix-expressions/prefix-increment-expression/p-5/neg/2.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/prefix-expressions/prefix-increment-expression/p-5/neg/2.1.fir.kt
index 00791794406..6ff1bbbd013 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/prefix-expressions/prefix-increment-expression/p-5/neg/2.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/prefix-expressions/prefix-increment-expression/p-5/neg/2.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/prefix-expressions/prefix-increment-expression/p-5/neg/2.1.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/prefix-expressions/prefix-increment-expression/p-5/neg/2.1.kt
index e56fbea41cf..c21e761c536 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/prefix-expressions/prefix-increment-expression/p-5/neg/2.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/prefix-expressions/prefix-increment-expression/p-5/neg/2.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/prefix-expressions/unary-minus-expression/p-3/pos/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/prefix-expressions/unary-minus-expression/p-3/pos/1.1.kt
index d0fbb89e27e..c0475acc933 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/prefix-expressions/unary-minus-expression/p-3/pos/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/prefix-expressions/unary-minus-expression/p-3/pos/1.1.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/prefix-expressions/unary-plus-expression/p-3/pos/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/prefix-expressions/unary-plus-expression/p-3/pos/1.1.kt
index a2294f8ffa0..706e48ff328 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/prefix-expressions/unary-plus-expression/p-3/pos/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/prefix-expressions/unary-plus-expression/p-3/pos/1.1.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/range-expression/p-4/pos/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/range-expression/p-4/pos/1.1.fir.kt
index 3a23a4b26ee..60b96479622 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/range-expression/p-4/pos/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/range-expression/p-4/pos/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/range-expression/p-4/pos/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/range-expression/p-4/pos/1.1.kt
index 0f3b00a2f24..bf1a198da7b 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/range-expression/p-4/pos/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/range-expression/p-4/pos/1.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-1/neg/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-1/neg/1.1.kt
index d6752e3b8de..2e18052f8aa 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-1/neg/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-1/neg/1.1.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-1/neg/3.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-1/neg/3.1.fir.kt
index 9495e5ba96f..991f106d4f4 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-1/neg/3.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-1/neg/3.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-1/neg/3.1.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-1/neg/3.1.kt
index 946e723c59d..36a1d0038d8 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-1/neg/3.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-1/neg/3.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-1/neg/4.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-1/neg/4.1.fir.kt
index c8cd48f3bd7..a44b4637590 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-1/neg/4.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-1/neg/4.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-1/neg/4.1.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-1/neg/4.1.kt
index bd3ed8645d3..da45814947e 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-1/neg/4.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-1/neg/4.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-1/neg/5.1.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-1/neg/5.1.kt
index 75bc089c765..3b0459bbcad 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-1/neg/5.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-1/neg/5.1.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-1/pos/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-1/pos/1.1.fir.kt
index ad1e6372c5e..478b5ca20a0 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-1/pos/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-1/pos/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-1/pos/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-1/pos/1.1.kt
index 5deaeb67705..5cb4b07ba4e 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-1/pos/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-1/pos/1.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-1/pos/3.1.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-1/pos/3.1.kt
index 8aef5b14c94..73469ca0934 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-1/pos/3.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-1/pos/3.1.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-1/pos/3.2.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-1/pos/3.2.kt
index fc599e90f87..a10ca5ac378 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-1/pos/3.2.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-1/pos/3.2.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-1/pos/4.1.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-1/pos/4.1.kt
index 27d50914291..917f5f5b816 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-1/pos/4.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-1/pos/4.1.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-1/pos/4.2.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-1/pos/4.2.kt
index 3b15cd11437..5e1fce4ac87 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-1/pos/4.2.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-1/pos/4.2.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-2/pos/2.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-2/pos/2.1.fir.kt
index 9cbd8c20535..2092f4e0b11 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-2/pos/2.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-2/pos/2.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // SKIP_TXT
 
 // TESTCASE NUMBER: 1
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-2/pos/2.1.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-2/pos/2.1.kt
index 6fdb5aa2e97..7c5783eb4fd 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-2/pos/2.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-2/pos/2.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // SKIP_TXT
 
 /*
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-5/pos/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-5/pos/1.1.fir.kt
index 5a2179bad92..689fb0d7e20 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-5/pos/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-5/pos/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-5/pos/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-5/pos/1.1.kt
index c174be4bba8..a09ad780b6b 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-5/pos/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-5/pos/1.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-5/pos/2.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-5/pos/2.1.fir.kt
index 8c3597a3ae5..f74196daafc 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-5/pos/2.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-5/pos/2.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-5/pos/2.1.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-5/pos/2.1.kt
index f0bfd5b7a66..18771433afc 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-5/pos/2.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-5/pos/2.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-8/neg/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-8/neg/1.1.fir.kt
index ec0f45713a1..1a768ef5728 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-8/neg/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-8/neg/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_VARIABLE -UNUSED_PARAMETER -FINAL_UPPER_BOUND
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-8/neg/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-8/neg/1.1.kt
index a8919c6e72f..0a9758e8301 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-8/neg/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-8/neg/1.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_VARIABLE -UNUSED_PARAMETER -FINAL_UPPER_BOUND
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-8/pos/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-8/pos/1.1.kt
index b4ea34bada7..463bd4230f0 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-8/pos/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-8/pos/1.1.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/type-checking-and-containment-checking-expressions/containment-checking-expression/p-5/pos/2.1.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/type-checking-and-containment-checking-expressions/containment-checking-expression/p-5/pos/2.1.kt
index 2654b952e15..8e869d3b28e 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/type-checking-and-containment-checking-expressions/containment-checking-expression/p-5/pos/2.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/type-checking-and-containment-checking-expressions/containment-checking-expression/p-5/pos/2.1.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNREACHABLE_CODE  -UNUSED_PARAMETER -UNUSED_VARIABLE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/type-checking-and-containment-checking-expressions/type-checking-expression/p-4/pos/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/type-checking-and-containment-checking-expressions/type-checking-expression/p-4/pos/1.1.kt
index 507d98fbe10..e57f4ff4119 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/type-checking-and-containment-checking-expressions/type-checking-expression/p-4/pos/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/type-checking-and-containment-checking-expressions/type-checking-expression/p-4/pos/1.1.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -USELESS_IS_CHECK -USELESS_NULLABLE_CHECK -UNUSED_VALUE -UNUSED_PARAMETER -UNREACHABLE_CODE -UNUSED_VARIABLE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/when-expression/p-3/neg/2.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/when-expression/p-3/neg/2.1.fir.kt
index f3f46bbe0d0..6ad632b1948 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/when-expression/p-3/neg/2.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/when-expression/p-3/neg/2.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/when-expression/p-3/neg/2.1.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/when-expression/p-3/neg/2.1.kt
index a0ddbf3f07f..fda80342072 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/when-expression/p-3/neg/2.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/when-expression/p-3/neg/2.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/when-expression/p-4/neg/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/when-expression/p-4/neg/1.1.fir.kt
index 2f59e90a64b..d5813d11d74 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/when-expression/p-4/neg/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/when-expression/p-4/neg/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 // FULL_JDK
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/when-expression/p-4/neg/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/when-expression/p-4/neg/1.1.kt
index 4ca0901e7d8..72a33276c38 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/when-expression/p-4/neg/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/when-expression/p-4/neg/1.1.kt
@@ -1,4 +1,4 @@
-// !LANGUAGE: +NewInference +ProhibitSimplificationOfNonTrivialConstBooleanExpressions
+// !LANGUAGE: +ProhibitSimplificationOfNonTrivialConstBooleanExpressions
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 // FULL_JDK
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/when-expression/p-4/pos/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/when-expression/p-4/pos/1.1.fir.kt
index 4a43164c7af..6e08d9702b7 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/when-expression/p-4/pos/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/when-expression/p-4/pos/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 // FULL_JDK
diff --git a/compiler/tests-spec/testData/diagnostics/linked/expressions/when-expression/p-4/pos/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/expressions/when-expression/p-4/pos/1.1.kt
index f6f95a9a2d1..5b836755a1d 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/expressions/when-expression/p-4/pos/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/expressions/when-expression/p-4/pos/1.1.kt
@@ -1,4 +1,4 @@
-// !LANGUAGE: +NewInference -ProhibitSimplificationOfNonTrivialConstBooleanExpressions
+// !LANGUAGE: -ProhibitSimplificationOfNonTrivialConstBooleanExpressions
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 // FULL_JDK
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/call-with-an-explicit-type-receiver/p-3/pos/2.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/call-with-an-explicit-type-receiver/p-3/pos/2.1.fir.kt
index 42722c95a72..6e4b1c6b827 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/call-with-an-explicit-type-receiver/p-3/pos/2.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/call-with-an-explicit-type-receiver/p-3/pos/2.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/call-with-an-explicit-type-receiver/p-3/pos/2.1.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/call-with-an-explicit-type-receiver/p-3/pos/2.1.kt
index a99748282c7..20c8cc6d85d 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/call-with-an-explicit-type-receiver/p-3/pos/2.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/call-with-an-explicit-type-receiver/p-3/pos/2.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/1.1.fir.kt
index 1484397f548..077d9ab227c 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/1.1.kt
index 3344071585c..dbe92898ee1 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/1.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/1.2.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/1.2.kt
index b791a4ee4e2..4d875dbff37 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/1.2.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/1.2.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/1.3.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/1.3.kt
index b88f02c4fd6..2bed539bd2b 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/1.3.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/1.3.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -EXTENSION_SHADOWED_BY_MEMBER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/1.4.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/1.4.kt
index 6d8396546cc..56dddb9a1a6 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/1.4.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/1.4.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -EXTENSION_SHADOWED_BY_MEMBER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/1.5.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/1.5.kt
index 20318ae4a4b..4bc77e4545e 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/1.5.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/1.5.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -DEBUG_INFO_LEAKING_THIS -EXTENSION_SHADOWED_BY_MEMBER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/2.1.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/2.1.kt
index ea1ff371034..01400a32fae 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/2.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/2.1.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/2.2.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/2.2.fir.kt
index 0b2889cdae0..3bc99352e20 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/2.2.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/2.2.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // SKIP_TXT
 
 // TESTCASE NUMBER: 1
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/2.2.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/2.2.kt
index f696c8c0ae3..0a29283f661 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/2.2.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/2.2.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // SKIP_TXT
 
 /*
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/2.3.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/2.3.kt
index 706944d3186..3327f896405 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/2.3.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/2.3.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/2.4.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/2.4.fir.kt
index 5276a627777..c9dca858b0e 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/2.4.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/2.4.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/2.4.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/2.4.kt
index 0a2b98a2a97..97d1f9f562a 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/2.4.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/2.4.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/3.1.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/3.1.kt
index 98ec51c13b8..949be2540c6 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/3.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/3.1.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/3.2.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/3.2.kt
index bf36a9cec1a..1ddea56d701 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/3.2.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/3.2.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/4.1.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/4.1.kt
index 3c9df8602a4..485c6fee396 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/4.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/4.1.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/4.2.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/4.2.kt
index f3ca0669019..ef91e102f2e 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/4.2.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/4.2.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/5.1.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/5.1.kt
index 175c8cfa365..68faeac92a2 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/5.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/5.1.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/5.2.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/5.2.kt
index 9018979741e..c60b16526be 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/5.2.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/5.2.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/6.1.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/6.1.kt
index 9091dc85232..6c9d2e8179f 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/6.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-an-explicit-receiver/p-6/pos/6.1.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.1.fir.kt
index 9638d5570bf..0d5da6c4462 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -UNREACHABLE_CODE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -IMPLICIT_NOTHING_RETURN_TYPE -DEBUG_INFO_LEAKING_THIS -EXTENSION_SHADOWED_BY_MEMBER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.1.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.1.kt
index a68debe2dfb..f977c088fbf 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -UNREACHABLE_CODE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -IMPLICIT_NOTHING_RETURN_TYPE -DEBUG_INFO_LEAKING_THIS -EXTENSION_SHADOWED_BY_MEMBER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.10.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.10.kt
index 34e363c8d02..c3f732f7c55 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.10.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.10.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.11.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.11.kt
index 57ee81c1cb9..9518938b351 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.11.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.11.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -REDUNDANT_SPREAD_OPERATOR_IN_NAMED_FORM_IN_FUNCTION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.12.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.12.kt
index 1cacea542bf..61859283c5e 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.12.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.12.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -NOTHING_TO_INLINE -EXTENSION_SHADOWED_BY_MEMBER -EXTENSION_FUNCTION_SHADOWED_BY_MEMBER_PROPERTY_WITH_INVOKE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.13.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.13.kt
index a0d739ae5db..9dd406fec8f 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.13.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.13.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -NOTHING_TO_INLINE -EXTENSION_FUNCTION_SHADOWED_BY_MEMBER_PROPERTY_WITH_INVOKE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.14.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.14.kt
index cc9dbd17c5c..0636990a7b6 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.14.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.14.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -NOTHING_TO_INLINE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.15.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.15.kt
index 60325160852..faa3af7bdfd 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.15.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.15.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -NOTHING_TO_INLINE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.16.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.16.kt
index 7ad873fb14e..3c49647a43a 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.16.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.16.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -NOTHING_TO_INLINE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.2.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.2.kt
index 7b8ab27eb81..f01440efd9d 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.2.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.2.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.3.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.3.kt
index 2eaec347dc4..ac8e1926b36 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.3.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.3.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.4.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.4.kt
index 81da5cb79e4..6d6d6f8e7d3 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.4.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.4.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.5.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.5.kt
index 3e6a5dcc249..c4cfeaa1543 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.5.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.5.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.6.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.6.kt
index f324db33523..b9c7bedb629 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.6.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.6.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.7.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.7.kt
index 551d9c22cd0..361d3158782 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.7.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.7.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.8.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.8.kt
index 4c6e686b536..0e3b526d07c 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.8.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.8.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -NOTHING_TO_INLINE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.9.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.9.kt
index 35f6297bf44..ad2682d0fab 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.9.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-1/pos/2.9.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -NOTHING_TO_INLINE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-5/pos/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-5/pos/1.1.fir.kt
index 7d4592a3a2e..1644e19b141 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-5/pos/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-named-parameters/p-5/pos/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-specified-type-parameters/p-2/pos/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-specified-type-parameters/p-2/pos/1.1.kt
index 8c2fbb4bc7f..5c4c891dd3e 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-specified-type-parameters/p-2/pos/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-specified-type-parameters/p-2/pos/1.1.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.1.fir.kt
index ccf3ed12d65..c4f5cc9c7db 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -UNREACHABLE_CODE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -IMPLICIT_NOTHING_RETURN_TYPE -DEBUG_INFO_LEAKING_THIS -EXTENSION_SHADOWED_BY_MEMBER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.1.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.1.kt
index 0e299255137..324d555f528 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -UNREACHABLE_CODE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -IMPLICIT_NOTHING_RETURN_TYPE -DEBUG_INFO_LEAKING_THIS -EXTENSION_SHADOWED_BY_MEMBER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.10.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.10.fir.kt
index 639caa205e9..c63ac44152f 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.10.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.10.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.10.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.10.kt
index c366ca987da..329119252c2 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.10.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.10.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.11.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.11.kt
index eca20f6eb55..8ac80f6019c 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.11.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.11.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.12.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.12.fir.kt
index 5731a210dd5..6fc076764d2 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.12.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.12.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -NOTHING_TO_INLINE -EXTENSION_SHADOWED_BY_MEMBER -EXTENSION_FUNCTION_SHADOWED_BY_MEMBER_PROPERTY_WITH_INVOKE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.12.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.12.kt
index 2dc47119c1f..01369d2fa0c 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.12.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.12.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -NOTHING_TO_INLINE -EXTENSION_SHADOWED_BY_MEMBER -EXTENSION_FUNCTION_SHADOWED_BY_MEMBER_PROPERTY_WITH_INVOKE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.13.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.13.fir.kt
index 498ba2ef125..130903c46db 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.13.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.13.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -NOTHING_TO_INLINE -EXTENSION_FUNCTION_SHADOWED_BY_MEMBER_PROPERTY_WITH_INVOKE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.13.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.13.kt
index 40710a9b7b2..4d9f5ad0029 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.13.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.13.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -NOTHING_TO_INLINE -EXTENSION_FUNCTION_SHADOWED_BY_MEMBER_PROPERTY_WITH_INVOKE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.14.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.14.fir.kt
index 9b034fd832c..702522beeb9 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.14.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.14.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -NOTHING_TO_INLINE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.14.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.14.kt
index 8f4009182b5..4b86cb6b48f 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.14.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.14.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -NOTHING_TO_INLINE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.15.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.15.fir.kt
index ddbdce304d8..d6149941f07 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.15.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.15.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -NOTHING_TO_INLINE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.15.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.15.kt
index 76d3beb85ce..abd352f8ff3 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.15.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.15.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -NOTHING_TO_INLINE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.16.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.16.fir.kt
index b8d52e5be8e..32f98430eb9 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.16.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.16.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -NOTHING_TO_INLINE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.16.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.16.kt
index fd1db955206..ae4c76b5c65 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.16.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.16.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -NOTHING_TO_INLINE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.17.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.17.fir.kt
index 5a3bc44c651..9dd394133d9 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.17.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.17.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.17.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.17.kt
index 4e1fc7a5b93..f1d0638b32b 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.17.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.17.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -EXTENSION_SHADOWED_BY_MEMBER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.18.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.18.kt
index 85fb650f193..97123ffa5c2 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.18.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.18.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.19.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.19.kt
index e9cf67a247e..7b356bb9784 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.19.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.19.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.2.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.2.kt
index a826a8d2c36..cce6d62b549 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.2.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.2.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.20.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.20.kt
index 0e304d65600..bc1068d01fc 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.20.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.20.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.21.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.21.kt
index 76da4ea2fd0..c530dc916f3 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.21.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.21.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.3.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.3.kt
index f4b4aabb879..97fca10a8a9 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.3.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.3.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.4.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.4.kt
index b826b05923d..d070f8449ee 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.4.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.4.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.5.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.5.kt
index 8da0fb3d2eb..cf01f011ec8 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.5.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.5.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.6.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.6.kt
index bf31cfd8aa1..abc2092760e 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.6.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.6.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.7.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.7.kt
index dc1a357fd20..17760950d51 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.7.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.7.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.8.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.8.fir.kt
index 74d268893a5..39c6c4c0aea 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.8.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.8.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -NOTHING_TO_INLINE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.8.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.8.kt
index eb5935f175f..7b3ece080b4 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.8.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.8.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -NOTHING_TO_INLINE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.9.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.9.fir.kt
index e97960dfaa4..a0a44b05895 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.9.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.9.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -NOTHING_TO_INLINE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.9.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.9.kt
index d3b646d5519..cb6dc9bfe66 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.9.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-with-trailing-lambda-expressions/p-1/pos/2.9.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -NOTHING_TO_INLINE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/neg/2.3.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/neg/2.3.fir.kt
index 17483c6bb39..8460559f846 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/neg/2.3.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/neg/2.3.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -NOTHING_TO_INLINE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/neg/2.3.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/neg/2.3.kt
index 5d1b1ea14f1..48e5a636ddf 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/neg/2.3.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/neg/2.3.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -NOTHING_TO_INLINE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/neg/2.4.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/neg/2.4.fir.kt
index 53320a63cf1..aed6992bcc0 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/neg/2.4.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/neg/2.4.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -NOTHING_TO_INLINE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/neg/2.4.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/neg/2.4.kt
index f0d908eda74..f320d85e42b 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/neg/2.4.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/neg/2.4.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -NOTHING_TO_INLINE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/neg/2.5.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/neg/2.5.fir.kt
index d40474914b1..56aea5542c8 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/neg/2.5.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/neg/2.5.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -NOTHING_TO_INLINE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/neg/2.5.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/neg/2.5.kt
index f128010a52d..ddc065d9604 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/neg/2.5.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/neg/2.5.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -NOTHING_TO_INLINE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/neg/4.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/neg/4.1.fir.kt
index bb79cfa07a3..0e64c4af9aa 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/neg/4.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/neg/4.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/neg/4.1.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/neg/4.1.kt
index 86c91cbaa53..bf8957ae740 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/neg/4.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/neg/4.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/neg/4.2.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/neg/4.2.fir.kt
index 8408260589a..4896aeb9c27 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/neg/4.2.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/neg/4.2.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/neg/4.2.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/neg/4.2.kt
index 13fd04b1624..f4415ceb806 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/neg/4.2.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/neg/4.2.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/neg/6.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/neg/6.1.fir.kt
index e0f1ac7f2bf..87767dbce34 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/neg/6.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/neg/6.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/neg/6.1.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/neg/6.1.kt
index 1978ee061b9..88524b4ed98 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/neg/6.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/neg/6.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/neg/6.4.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/neg/6.4.kt
index 630b644c398..83295c0a461 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/neg/6.4.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/neg/6.4.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/2.1.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/2.1.kt
index 11e1238d404..42f90760571 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/2.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/2.1.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -NOTHING_TO_INLINE -EXTENSION_SHADOWED_BY_MEMBER -EXTENSION_FUNCTION_SHADOWED_BY_MEMBER_PROPERTY_WITH_INVOKE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/2.2.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/2.2.kt
index 336fbefb985..2f926474c75 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/2.2.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/2.2.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -NOTHING_TO_INLINE -EXTENSION_FUNCTION_SHADOWED_BY_MEMBER_PROPERTY_WITH_INVOKE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/2.3.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/2.3.kt
index 40482eba191..a236bb7bbf9 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/2.3.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/2.3.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -NOTHING_TO_INLINE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/2.4.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/2.4.kt
index 76654d1c6c1..56115ad4b0a 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/2.4.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/2.4.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -NOTHING_TO_INLINE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/2.5.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/2.5.kt
index dfda2bf1c2c..3da29f3e5db 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/2.5.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/2.5.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -NOTHING_TO_INLINE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/4.1.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/4.1.kt
index 5959a636542..de6d5bd9051 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/4.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/4.1.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -NOTHING_TO_INLINE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/4.2.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/4.2.fir.kt
index 033194a1093..bafbccb7df2 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/4.2.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/4.2.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/4.2.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/4.2.kt
index 623988521a6..aaa34e028bd 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/4.2.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/4.2.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/4.3.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/4.3.fir.kt
index cbc9bdae412..3719e6eee4d 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/4.3.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/4.3.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/4.3.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/4.3.kt
index d7dd3262988..72a19ea3d69 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/4.3.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/4.3.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/4.4.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/4.4.fir.kt
index 3c380a4e0b4..91392d430a6 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/4.4.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/4.4.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/4.4.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/4.4.kt
index c8a1f356ad7..c655c50b1ac 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/4.4.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/4.4.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/4.5.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/4.5.fir.kt
index b4d793e0591..3808916ae6a 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/4.5.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/4.5.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/4.5.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/4.5.kt
index 158402ea4ca..f25bb5e3460 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/4.5.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/4.5.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/4.6.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/4.6.fir.kt
index 36d98e3d733..22f4133808b 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/4.6.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/4.6.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/4.6.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/4.6.kt
index 8e63afc1345..d93897e398f 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/4.6.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/4.6.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/5.1.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/5.1.kt
index 7079b84320c..333747e6ba7 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/5.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/5.1.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -NOTHING_TO_INLINE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/6.1.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/6.1.kt
index 5d23e1a19cc..a261f714f1d 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/6.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/6.1.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/6.2.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/6.2.fir.kt
index ee54f0ecfbd..e9da362acf1 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/6.2.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/6.2.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/6.2.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/6.2.kt
index c753511cd98..369c725e61b 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/6.2.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/6.2.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/6.3.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/6.3.fir.kt
index bc4643d91ce..e8480d5395f 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/6.3.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/6.3.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/6.3.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/6.3.kt
index 2b8ce04d271..15bf5c22d3f 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/6.3.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/6.3.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/7.1.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/7.1.kt
index 1744dafd658..d0545db14af 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/7.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/call-without-an-explicit-receiver/p-5/pos/7.1.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/neg/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/neg/1.1.fir.kt
index 7b808b81028..cb18202f514 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/neg/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/neg/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -EXTENSION_SHADOWED_BY_MEMBER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/neg/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/neg/1.1.kt
index 814f1721f4a..f435005908f 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/neg/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/neg/1.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -EXTENSION_SHADOWED_BY_MEMBER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/neg/1.2.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/neg/1.2.fir.kt
index 89614af245d..ccca80ffb74 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/neg/1.2.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/neg/1.2.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/neg/1.2.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/neg/1.2.kt
index cebfa72b022..bb44eb5a6d1 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/neg/1.2.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/neg/1.2.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/neg/1.3.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/neg/1.3.fir.kt
index 05a36a21622..796b41a6103 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/neg/1.3.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/neg/1.3.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/neg/1.3.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/neg/1.3.kt
index 97291830cde..0289f1c0e41 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/neg/1.3.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/neg/1.3.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/neg/1.4.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/neg/1.4.fir.kt
index 0c2db1cd175..52244e0c3d5 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/neg/1.4.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/neg/1.4.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/neg/1.4.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/neg/1.4.kt
index bcd0f39ca1a..f4774607753 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/neg/1.4.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/neg/1.4.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/neg/4.5.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/neg/4.5.fir.kt
index 39608866ff9..114b6082441 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/neg/4.5.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/neg/4.5.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/neg/4.5.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/neg/4.5.kt
index 21513bc8244..e4497234d36 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/neg/4.5.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/neg/4.5.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/pos/4.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/pos/4.1.fir.kt
index 84b861afaa5..c2253b17284 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/pos/4.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/pos/4.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/pos/4.1.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/pos/4.1.kt
index fdb3af29665..86a5d942549 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/pos/4.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/pos/4.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -EXTENSION_SHADOWED_BY_MEMBER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/pos/4.2.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/pos/4.2.kt
index 3b0857c6758..3aa0a324826 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/pos/4.2.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/pos/4.2.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/pos/4.3.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/pos/4.3.fir.kt
index ab411ce4a71..d7a6209b7b8 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/pos/4.3.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/pos/4.3.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/pos/4.3.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/pos/4.3.kt
index 1596024b23b..ef71ac80c1d 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/pos/4.3.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/pos/4.3.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/pos/4.4.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/pos/4.4.kt
index ab7c1fc0b95..7798088e6dd 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/pos/4.4.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/pos/4.4.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/pos/4.5.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/pos/4.5.kt
index 7e0b7beb64f..33e89fa2aaf 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/pos/4.5.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/infix-function-call/p-2/pos/4.5.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.1.fir.kt
index bcb3cca4f98..30ec549e9fb 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.1.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.1.kt
index 69e5ac775c7..34643987ae4 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.2.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.2.fir.kt
index c6053ba1644..cd53764f4b9 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.2.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.2.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.2.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.2.kt
index ddc82ee561d..61d5fe19533 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.2.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.2.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.4.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.4.fir.kt
index 7769a420d61..97eea89d3c0 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.4.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.4.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.4.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.4.kt
index 514956ac1c0..412415a53a9 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.4.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.4.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.5.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.5.fir.kt
index b58059a8d80..c5a74d36c71 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.5.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.5.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.5.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.5.kt
index 0c8eb1ffd36..54ce346e2b2 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.5.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.5.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.6.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.6.fir.kt
index 3a450a2c662..0f326859055 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.6.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.6.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.6.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.6.kt
index 1e79e1c7c5f..6ac1aedd9c6 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.6.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.6.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.7.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.7.fir.kt
index 263ec1b07d3..8daa6024a47 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.7.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.7.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.7.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.7.kt
index dd100d8b2ef..d93f7ca7087 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.7.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.7.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.8.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.8.fir.kt
index 83dda7ba2c9..b88d3c68012 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.8.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.8.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.8.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.8.kt
index 1bc4a7ddf69..55b5250e1b8 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.8.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.8.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.9.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.9.fir.kt
index e136c996c12..d048d73efea 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.9.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.9.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.9.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.9.kt
index c954411f57f..ec66f919573 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.9.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/neg/2.9.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/pos/2.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/pos/2.1.fir.kt
index 1883850ef07..7bdee51a08a 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/pos/2.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/pos/2.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/pos/2.1.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/pos/2.1.kt
index 4c6ecfe62c9..56beea31c85 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/pos/2.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/pos/2.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/pos/2.2.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/pos/2.2.fir.kt
index 581054b825d..a70bdd0a463 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/pos/2.2.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/pos/2.2.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNNECESSARY_SAFE_CALL -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/pos/2.2.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/pos/2.2.kt
index bd3f6d01ddc..0b4b2f94dc7 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/pos/2.2.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/pos/2.2.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNNECESSARY_SAFE_CALL -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/pos/2.3.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/pos/2.3.fir.kt
index a36ae8361df..ff2b7de2e7f 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/pos/2.3.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/pos/2.3.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNNECESSARY_SAFE_CALL -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/pos/2.3.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/pos/2.3.kt
index ed9f6c20478..d31bf895c60 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/pos/2.3.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-1/pos/2.3.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNNECESSARY_SAFE_CALL -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-2/pos/3.1.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-2/pos/3.1.kt
index 09355fd4f0e..32589007141 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-2/pos/3.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-2/pos/3.1.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -EXTENSION_SHADOWED_BY_MEMBER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-2/pos/3.2.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-2/pos/3.2.fir.kt
index 09355fd4f0e..32589007141 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-2/pos/3.2.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-2/pos/3.2.fir.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -EXTENSION_SHADOWED_BY_MEMBER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-2/pos/3.2.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-2/pos/3.2.kt
index 6f4124e017c..8a16b7f7704 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-2/pos/3.2.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-2/pos/3.2.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-2/pos/3.3.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-2/pos/3.3.kt
index bd6de85aadb..cfd8e9dd3b9 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-2/pos/3.3.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-2/pos/3.3.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -EXTENSION_SHADOWED_BY_MEMBER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-2/pos/3.4.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-2/pos/3.4.kt
index 1e643abfc97..e2c7d0a3759 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-2/pos/3.4.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-2/pos/3.4.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -EXTENSION_SHADOWED_BY_MEMBER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-2/pos/3.5.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-2/pos/3.5.kt
index ae33b110163..07193ef447c 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-2/pos/3.5.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-2/pos/3.5.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -EXTENSION_SHADOWED_BY_MEMBER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-2/pos/3.6.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-2/pos/3.6.kt
index c4c2fea1baa..89290f8ac42 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-2/pos/3.6.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-2/pos/3.6.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-4/neg/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-4/neg/1.1.fir.kt
index 2296bc7cf31..d96c5005b08 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-4/neg/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-4/neg/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-4/neg/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-4/neg/1.1.kt
index 519e16397b7..7814a430432 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-4/neg/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-4/neg/1.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-4/pos/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-4/pos/1.1.fir.kt
index 15f04316802..4f5a9381985 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-4/pos/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-4/pos/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-4/pos/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-4/pos/1.1.kt
index 0cffd5598cc..9b4086bfac8 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-4/pos/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/building-the-overload-candidate-set-ocs/operator-call/p-4/pos/1.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/callables-and-invoke-convention/p-2/pos/10.1.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/callables-and-invoke-convention/p-2/pos/10.1.kt
index a360b7cbbb5..c5055e2079c 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/callables-and-invoke-convention/p-2/pos/10.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/callables-and-invoke-convention/p-2/pos/10.1.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/callables-and-invoke-convention/p-2/pos/8.1.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/callables-and-invoke-convention/p-2/pos/8.1.kt
index e45ac055048..f3b8e520b4a 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/callables-and-invoke-convention/p-2/pos/8.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/callables-and-invoke-convention/p-2/pos/8.1.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/callables-and-invoke-convention/p-2/pos/9.1.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/callables-and-invoke-convention/p-2/pos/9.1.kt
index cc38ad1ce95..670e6496574 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/callables-and-invoke-convention/p-2/pos/9.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/callables-and-invoke-convention/p-2/pos/9.1.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/1.1.fir.kt
index a1b53bc3ede..33044ab1f35 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/1.1.kt
index c72b65d8d71..9932b7a11c3 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/1.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/1.2.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/1.2.fir.kt
index d6b0c9b82cc..01b94ed5a3b 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/1.2.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/1.2.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/1.2.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/1.2.kt
index 11669682ed1..80bfab247ec 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/1.2.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/1.2.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/4.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/4.1.fir.kt
index fa0207b7734..0e0d39ad12b 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/4.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/4.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/4.1.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/4.1.kt
index 8cb2a7325b5..a500bbc03cc 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/4.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/4.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/4.2.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/4.2.fir.kt
index fbc8bd757ae..81b291c1cb8 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/4.2.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/4.2.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/4.2.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/4.2.kt
index b721b6118f1..7136c6af904 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/4.2.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/4.2.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/4.3.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/4.3.fir.kt
index cc171c2edbc..df3672b17a1 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/4.3.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/4.3.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/4.3.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/4.3.kt
index 075d53c8445..dd9a2612aa5 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/4.3.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/4.3.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/4.4.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/4.4.fir.kt
index ea206a07293..1c275829b95 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/4.4.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/4.4.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/4.4.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/4.4.kt
index 707971a43cd..4ddc06320d2 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/4.4.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/4.4.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/4.5.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/4.5.fir.kt
index a947d0db114..3d33412f547 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/4.5.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/4.5.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/4.5.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/4.5.kt
index c4d3da033b3..c8e257e1cf5 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/4.5.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/4.5.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/5.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/5.1.fir.kt
index e4bc77811eb..675e91bb849 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/5.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/5.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/5.1.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/5.1.kt
index 5b3f08e3c1c..18caf2b7e7a 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/5.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-11/pos/5.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-12/pos/2.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-12/pos/2.1.fir.kt
index 011f6984143..8a2e5f8b86a 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-12/pos/2.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-12/pos/2.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-12/pos/2.1.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-12/pos/2.1.kt
index 857e0139387..4e7ce3b9a23 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-12/pos/2.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-12/pos/2.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-12/pos/2.2.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-12/pos/2.2.fir.kt
index c45ae1c186e..9ee6cd4ccae 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-12/pos/2.2.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-12/pos/2.2.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-12/pos/2.2.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-12/pos/2.2.kt
index 197af53f726..9205c422ceb 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-12/pos/2.2.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-12/pos/2.2.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-12/pos/2.3.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-12/pos/2.3.fir.kt
index ee7d40e4158..279e69f937b 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-12/pos/2.3.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-12/pos/2.3.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-12/pos/2.3.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-12/pos/2.3.kt
index e6027ab05a4..887750054bb 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-12/pos/2.3.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-12/pos/2.3.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-12/pos/2.4.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-12/pos/2.4.fir.kt
index 26f71e622f3..1bc1d334880 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-12/pos/2.4.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-12/pos/2.4.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-12/pos/2.4.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-12/pos/2.4.kt
index c2b07ea12b9..1cd083148d2 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-12/pos/2.4.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-12/pos/2.4.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-12/pos/2.5.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-12/pos/2.5.fir.kt
index 8022b78b216..f939b6fb066 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-12/pos/2.5.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-12/pos/2.5.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-12/pos/2.5.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-12/pos/2.5.kt
index b1dd3b0f685..0b3ff084dd8 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-12/pos/2.5.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-12/pos/2.5.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-12/pos/2.6.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-12/pos/2.6.fir.kt
index 0ab96f4857e..4f5325def2e 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-12/pos/2.6.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-12/pos/2.6.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-12/pos/2.6.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-12/pos/2.6.kt
index c023498c1a3..d164a86731a 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-12/pos/2.6.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-12/pos/2.6.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-12/pos/2.7.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-12/pos/2.7.fir.kt
index 4ba22d64170..4b01347b98e 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-12/pos/2.7.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-12/pos/2.7.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-12/pos/2.7.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-12/pos/2.7.kt
index c6de3c222dc..9d990521b93 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-12/pos/2.7.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-12/pos/2.7.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-14/neg/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-14/neg/1.1.fir.kt
index 116c5d1dcd3..6c244becb75 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-14/neg/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-14/neg/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-14/neg/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-14/neg/1.1.kt
index 7c603c2a711..b89eb4645bf 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-14/neg/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-14/neg/1.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-14/neg/1.2.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-14/neg/1.2.fir.kt
index 4f2dd846d57..8ef337d0e8e 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-14/neg/1.2.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-14/neg/1.2.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-14/neg/1.2.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-14/neg/1.2.kt
index 029eec91940..0632bcd8505 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-14/neg/1.2.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-14/neg/1.2.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-14/neg/1.3.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-14/neg/1.3.fir.kt
index 71e5f1ae919..e9099b6d312 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-14/neg/1.3.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-14/neg/1.3.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-14/neg/1.3.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-14/neg/1.3.kt
index cd2b24d984c..5137f3c4871 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-14/neg/1.3.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-14/neg/1.3.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-14/neg/1.4.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-14/neg/1.4.fir.kt
index 4bb2a1a3293..63aa2383257 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-14/neg/1.4.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-14/neg/1.4.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-14/neg/1.4.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-14/neg/1.4.kt
index 3869e6df763..3c2ad1647f0 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-14/neg/1.4.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-14/neg/1.4.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-14/neg/1.6.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-14/neg/1.6.fir.kt
index 7e76e2434fb..e72b9caf02d 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-14/neg/1.6.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-14/neg/1.6.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-14/neg/1.6.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-14/neg/1.6.kt
index 2a047055962..64f53a9bbd7 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-14/neg/1.6.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-14/neg/1.6.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-14/neg/1.7.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-14/neg/1.7.fir.kt
index b03a9b4a913..32478fd2649 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-14/neg/1.7.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-14/neg/1.7.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-14/neg/1.7.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-14/neg/1.7.kt
index 622bc508df7..3f4c5e9ac5a 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-14/neg/1.7.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-14/neg/1.7.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-17/neg/2.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-17/neg/2.1.fir.kt
index 164f851901b..5fcf17c51c3 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-17/neg/2.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-17/neg/2.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-17/neg/2.1.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-17/neg/2.1.kt
index 789cb0b41ce..d7b4df288e1 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-17/neg/2.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-17/neg/2.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-17/neg/2.2.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-17/neg/2.2.fir.kt
index 4e0b9ac9734..953ec86cf2a 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-17/neg/2.2.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-17/neg/2.2.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-17/neg/2.2.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-17/neg/2.2.kt
index cedaa0ad25d..e7bd4859e8c 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-17/neg/2.2.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-17/neg/2.2.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-3/pos/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-3/pos/1.1.fir.kt
index e76fffddd82..98163267850 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-3/pos/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-3/pos/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-3/pos/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-3/pos/1.1.kt
index 001b7116a28..af737c69b91 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-3/pos/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-3/pos/1.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-3/pos/1.2.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-3/pos/1.2.fir.kt
index 058e74455f0..49f9a0f1761 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-3/pos/1.2.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-3/pos/1.2.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-3/pos/1.2.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-3/pos/1.2.kt
index 9d73f847a5c..388377fc4f1 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-3/pos/1.2.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-3/pos/1.2.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-3/pos/1.3.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-3/pos/1.3.fir.kt
index 0ebe8698717..42585770eae 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-3/pos/1.3.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-3/pos/1.3.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-3/pos/1.3.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-3/pos/1.3.kt
index 35d3e4bd05f..304ecbe9b28 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-3/pos/1.3.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-3/pos/1.3.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-3/pos/1.4.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-3/pos/1.4.fir.kt
index 831352ed67a..638d88cf5a4 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-3/pos/1.4.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-3/pos/1.4.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-3/pos/1.4.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-3/pos/1.4.kt
index 15d3d46b1cc..291e473aa7d 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-3/pos/1.4.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-3/pos/1.4.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-9/neg/2.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-9/neg/2.1.fir.kt
index 94b12645e1c..9deed170b15 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-9/neg/2.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-9/neg/2.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-9/neg/2.1.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-9/neg/2.1.kt
index 752fd4be102..e2e68eb3edc 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-9/neg/2.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-9/neg/2.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-9/neg/2.2.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-9/neg/2.2.fir.kt
index 50f66439b92..ebc3f32287f 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-9/neg/2.2.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-9/neg/2.2.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-9/neg/2.2.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-9/neg/2.2.kt
index f7ca5439fcb..f339692ffaf 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-9/neg/2.2.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-9/neg/2.2.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-9/neg/2.3.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-9/neg/2.3.fir.kt
index 34715bb2956..426b263a640 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-9/neg/2.3.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-9/neg/2.3.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-9/neg/2.3.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-9/neg/2.3.kt
index c3aa78c190e..d9acef68477 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-9/neg/2.3.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-9/neg/2.3.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-9/pos/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-9/pos/1.1.fir.kt
index df22fb15b0b..2d413d334d6 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-9/pos/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-9/pos/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-9/pos/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-9/pos/1.1.kt
index 836a2e207e0..0ba47757134 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-9/pos/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/algorithm-of-msc-selection/p-9/pos/1.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/rationale-1/p-2/pos/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/rationale-1/p-2/pos/1.1.fir.kt
index 955187601be..f8afa389d19 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/rationale-1/p-2/pos/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/rationale-1/p-2/pos/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/rationale-1/p-2/pos/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/rationale-1/p-2/pos/1.1.kt
index abe6aa95f94..517904cda1e 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/rationale-1/p-2/pos/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/rationale-1/p-2/pos/1.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/rationale-1/p-3/neg/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/rationale-1/p-3/neg/1.1.fir.kt
index f0d55265dd7..37f52f16cc6 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/rationale-1/p-3/neg/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/rationale-1/p-3/neg/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/rationale-1/p-3/neg/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/rationale-1/p-3/neg/1.1.kt
index 2e696743a09..f29b2d89fbc 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/rationale-1/p-3/neg/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/choosing-the-most-specific-candidate-from-the-overload-candidate-set/rationale-1/p-3/neg/1.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/determining-function-applicability-for-a-specific-call/description/p-2/neg/2.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/determining-function-applicability-for-a-specific-call/description/p-2/neg/2.1.fir.kt
index 4163b9b15ef..70e5f580fb0 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/determining-function-applicability-for-a-specific-call/description/p-2/neg/2.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/determining-function-applicability-for-a-specific-call/description/p-2/neg/2.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/determining-function-applicability-for-a-specific-call/description/p-2/neg/2.1.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/determining-function-applicability-for-a-specific-call/description/p-2/neg/2.1.kt
index ab5a5b122ba..b7cfa1600c2 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/determining-function-applicability-for-a-specific-call/description/p-2/neg/2.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/determining-function-applicability-for-a-specific-call/description/p-2/neg/2.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/receivers/p-5/pos/2.1.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/receivers/p-5/pos/2.1.kt
index 8ad89eb918c..fb2b566487f 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/receivers/p-5/pos/2.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/receivers/p-5/pos/2.1.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/receivers/p-5/pos/3.1.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/receivers/p-5/pos/3.1.kt
index 3d718ce07df..c741f5a56f7 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/receivers/p-5/pos/3.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/receivers/p-5/pos/3.1.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/receivers/p-5/pos/5.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/receivers/p-5/pos/5.1.fir.kt
index 6d4df0c11d0..06d690eee85 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/receivers/p-5/pos/5.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/receivers/p-5/pos/5.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/receivers/p-5/pos/5.1.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/receivers/p-5/pos/5.1.kt
index 9af4bf2b5dc..ca27011c2a1 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/receivers/p-5/pos/5.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/receivers/p-5/pos/5.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/bidirectional-resolution-for-callable-calls/p-1/pos/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/bidirectional-resolution-for-callable-calls/p-1/pos/1.1.fir.kt
index 7e99f3d5e7d..1ebc65323d6 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/bidirectional-resolution-for-callable-calls/p-1/pos/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/bidirectional-resolution-for-callable-calls/p-1/pos/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/bidirectional-resolution-for-callable-calls/p-1/pos/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/bidirectional-resolution-for-callable-calls/p-1/pos/1.1.kt
index 16ccb739562..a975001b130 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/bidirectional-resolution-for-callable-calls/p-1/pos/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/bidirectional-resolution-for-callable-calls/p-1/pos/1.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/bidirectional-resolution-for-callable-calls/p-3/neg/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/bidirectional-resolution-for-callable-calls/p-3/neg/1.1.fir.kt
index 58efe42ad22..1ac21c4531c 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/bidirectional-resolution-for-callable-calls/p-3/neg/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/bidirectional-resolution-for-callable-calls/p-3/neg/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/bidirectional-resolution-for-callable-calls/p-3/neg/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/bidirectional-resolution-for-callable-calls/p-3/neg/1.1.kt
index cb1c8e2f864..d242c7a921e 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/bidirectional-resolution-for-callable-calls/p-3/neg/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/bidirectional-resolution-for-callable-calls/p-3/neg/1.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/bidirectional-resolution-for-callable-calls/p-3/pos/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/bidirectional-resolution-for-callable-calls/p-3/pos/1.1.fir.kt
index a582651ad96..949d6c58107 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/bidirectional-resolution-for-callable-calls/p-3/pos/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/bidirectional-resolution-for-callable-calls/p-3/pos/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/bidirectional-resolution-for-callable-calls/p-3/pos/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/bidirectional-resolution-for-callable-calls/p-3/pos/1.1.kt
index c702dd4caea..fcdda14a56e 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/bidirectional-resolution-for-callable-calls/p-3/pos/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/bidirectional-resolution-for-callable-calls/p-3/pos/1.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/bidirectional-resolution-for-callable-calls/p-3/pos/1.2.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/bidirectional-resolution-for-callable-calls/p-3/pos/1.2.fir.kt
index ced04473103..b38503cd69a 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/bidirectional-resolution-for-callable-calls/p-3/pos/1.2.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/bidirectional-resolution-for-callable-calls/p-3/pos/1.2.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/bidirectional-resolution-for-callable-calls/p-3/pos/1.2.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/bidirectional-resolution-for-callable-calls/p-3/pos/1.2.kt
index e1da2c044a1..374261aeefa 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/bidirectional-resolution-for-callable-calls/p-3/pos/1.2.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/bidirectional-resolution-for-callable-calls/p-3/pos/1.2.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/bidirectional-resolution-for-callable-calls/p-3/pos/1.3.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/bidirectional-resolution-for-callable-calls/p-3/pos/1.3.fir.kt
index 85099b7becb..43c612575e7 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/bidirectional-resolution-for-callable-calls/p-3/pos/1.3.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/bidirectional-resolution-for-callable-calls/p-3/pos/1.3.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/bidirectional-resolution-for-callable-calls/p-3/pos/1.3.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/bidirectional-resolution-for-callable-calls/p-3/pos/1.3.kt
index 75e5ac1af45..dbcf6980f59 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/bidirectional-resolution-for-callable-calls/p-3/pos/1.3.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/bidirectional-resolution-for-callable-calls/p-3/pos/1.3.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/bidirectional-resolution-for-callable-calls/p-3/pos/1.4.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/bidirectional-resolution-for-callable-calls/p-3/pos/1.4.fir.kt
index 1b24c7ea824..94a2dae9984 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/bidirectional-resolution-for-callable-calls/p-3/pos/1.4.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/bidirectional-resolution-for-callable-calls/p-3/pos/1.4.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/bidirectional-resolution-for-callable-calls/p-3/pos/1.4.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/bidirectional-resolution-for-callable-calls/p-3/pos/1.4.kt
index e21d5fcdd68..abbd8347240 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/bidirectional-resolution-for-callable-calls/p-3/pos/1.4.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/bidirectional-resolution-for-callable-calls/p-3/pos/1.4.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/p-2/pos/2.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/p-2/pos/2.1.fir.kt
index 8a7021205cb..53a257dc94e 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/p-2/pos/2.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/p-2/pos/2.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/p-2/pos/2.1.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/p-2/pos/2.1.kt
index b65f9697698..1a8089fe094 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/p-2/pos/2.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/p-2/pos/2.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/neg/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/neg/1.1.fir.kt
index de21a863b5e..2d0bf501a7d 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/neg/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/neg/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/neg/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/neg/1.1.kt
index 4adbbc76bcf..72fbf844f6a 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/neg/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/neg/1.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/neg/1.2.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/neg/1.2.fir.kt
index 149cd4d796c..c9f43952332 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/neg/1.2.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/neg/1.2.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/neg/1.2.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/neg/1.2.kt
index fc5c1b7459d..633157898ac 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/neg/1.2.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/neg/1.2.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/neg/1.3.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/neg/1.3.fir.kt
index ce61061202f..a9c62086655 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/neg/1.3.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/neg/1.3.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/neg/1.3.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/neg/1.3.kt
index 52c2cd91678..4e9cefacd27 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/neg/1.3.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/neg/1.3.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/neg/1.4.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/neg/1.4.fir.kt
index 3a4faff3dd6..25abc6329fc 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/neg/1.4.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/neg/1.4.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/neg/1.4.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/neg/1.4.kt
index 75b387b33c1..a7253129484 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/neg/1.4.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/neg/1.4.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/neg/1.5.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/neg/1.5.fir.kt
index 7ab08f6ddca..26ad667d71e 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/neg/1.5.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/neg/1.5.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/neg/1.5.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/neg/1.5.kt
index 52130d1310b..2371b6ce905 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/neg/1.5.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/neg/1.5.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/pos/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/pos/1.1.fir.kt
index 5626e07feac..d7b77e750bb 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/pos/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/pos/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/pos/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/pos/1.1.kt
index d4ec4776dbd..eb7506ece22 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/pos/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/pos/1.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/pos/1.2.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/pos/1.2.fir.kt
index 4b17a42c762..d1f2ca2c172 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/pos/1.2.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/pos/1.2.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/pos/1.2.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/pos/1.2.kt
index b1f80638768..85d46a3c792 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/pos/1.2.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/pos/1.2.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/pos/1.3.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/pos/1.3.fir.kt
index b74108dae1c..6e4047aab2b 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/pos/1.3.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/pos/1.3.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/pos/1.3.kt b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/pos/1.3.kt
index 3c9a28c939b..98f15c2da14 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/pos/1.3.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/overload-resolution/resolving-callable-references/resolving-callable-references-not-used-as-arguments-to-a-call/p-1/pos/1.3.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/statements/assignments/operator-assignments/p-2/neg/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/statements/assignments/operator-assignments/p-2/neg/1.1.fir.kt
index 4fc8281b2bd..3150df4d89e 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/statements/assignments/operator-assignments/p-2/neg/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/statements/assignments/operator-assignments/p-2/neg/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/statements/assignments/operator-assignments/p-2/neg/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/statements/assignments/operator-assignments/p-2/neg/1.1.kt
index fdef319ecb4..c830788a879 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/statements/assignments/operator-assignments/p-2/neg/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/statements/assignments/operator-assignments/p-2/neg/1.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/statements/assignments/operator-assignments/p-2/pos/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/statements/assignments/operator-assignments/p-2/pos/1.1.kt
index 74196bf838a..728587c23d9 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/statements/assignments/operator-assignments/p-2/pos/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/statements/assignments/operator-assignments/p-2/pos/1.1.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/statements/assignments/p-1/neg/2.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/statements/assignments/p-1/neg/2.1.fir.kt
index db60c3ca083..8446fb9e937 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/statements/assignments/p-1/neg/2.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/statements/assignments/p-1/neg/2.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/statements/assignments/p-1/neg/2.1.kt b/compiler/tests-spec/testData/diagnostics/linked/statements/assignments/p-1/neg/2.1.kt
index 99f59139fa9..9647510237d 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/statements/assignments/p-1/neg/2.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/statements/assignments/p-1/neg/2.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/statements/assignments/p-2/neg/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/statements/assignments/p-2/neg/1.1.fir.kt
index 849b63738a0..573ea76e144 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/statements/assignments/p-2/neg/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/statements/assignments/p-2/neg/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/statements/assignments/p-2/neg/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/statements/assignments/p-2/neg/1.1.kt
index ef40ff5a054..cdba11eb0e2 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/statements/assignments/p-2/neg/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/statements/assignments/p-2/neg/1.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/statements/assignments/p-2/neg/1.2.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/statements/assignments/p-2/neg/1.2.fir.kt
index 7e1ff9cfa3d..945a1f68765 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/statements/assignments/p-2/neg/1.2.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/statements/assignments/p-2/neg/1.2.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNSAFE_CALL -UNREACHABLE_CODE -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/statements/assignments/p-2/neg/1.2.kt b/compiler/tests-spec/testData/diagnostics/linked/statements/assignments/p-2/neg/1.2.kt
index ec04ba42a8b..6ee87e117d4 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/statements/assignments/p-2/neg/1.2.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/statements/assignments/p-2/neg/1.2.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNSAFE_CALL -UNREACHABLE_CODE -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/statements/loop-statements/do-while-loop-statement/p-1/pos/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/statements/loop-statements/do-while-loop-statement/p-1/pos/1.1.kt
index c00afece0ad..ed3aa91232b 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/statements/loop-statements/do-while-loop-statement/p-1/pos/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/statements/loop-statements/do-while-loop-statement/p-1/pos/1.1.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNREACHABLE_CODE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/statements/loop-statements/do-while-loop-statement/p-3/neg/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/statements/loop-statements/do-while-loop-statement/p-3/neg/1.1.fir.kt
index 7796e06f34b..69b70c0daa8 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/statements/loop-statements/do-while-loop-statement/p-3/neg/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/statements/loop-statements/do-while-loop-statement/p-3/neg/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/statements/loop-statements/do-while-loop-statement/p-3/neg/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/statements/loop-statements/do-while-loop-statement/p-3/neg/1.1.kt
index 74d6a7fcb2b..732454a2319 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/statements/loop-statements/do-while-loop-statement/p-3/neg/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/statements/loop-statements/do-while-loop-statement/p-3/neg/1.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/statements/loop-statements/while-loop-statement/p-1/pos/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/statements/loop-statements/while-loop-statement/p-1/pos/1.1.kt
index 0e0a0098a4d..5c551c85c7c 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/statements/loop-statements/while-loop-statement/p-1/pos/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/statements/loop-statements/while-loop-statement/p-1/pos/1.1.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNREACHABLE_CODE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/statements/loop-statements/while-loop-statement/p-3/neg/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/statements/loop-statements/while-loop-statement/p-3/neg/1.1.fir.kt
index bf83a6f0218..bcc8df0aca3 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/statements/loop-statements/while-loop-statement/p-3/neg/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/statements/loop-statements/while-loop-statement/p-3/neg/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/statements/loop-statements/while-loop-statement/p-3/neg/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/statements/loop-statements/while-loop-statement/p-3/neg/1.1.kt
index 5b5399265bf..d1f25d9eaaf 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/statements/loop-statements/while-loop-statement/p-3/neg/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/statements/loop-statements/while-loop-statement/p-3/neg/1.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/type-inference/smart-casts/smart-cast-sink-stability/p-5/neg/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/type-inference/smart-casts/smart-cast-sink-stability/p-5/neg/1.1.fir.kt
index 1eb3b12d652..10678542697 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/type-inference/smart-casts/smart-cast-sink-stability/p-5/neg/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/type-inference/smart-casts/smart-cast-sink-stability/p-5/neg/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/type-inference/smart-casts/smart-cast-sink-stability/p-5/neg/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/type-inference/smart-casts/smart-cast-sink-stability/p-5/neg/1.1.kt
index 0f14cff42a9..353298f6c06 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/type-inference/smart-casts/smart-cast-sink-stability/p-5/neg/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/type-inference/smart-casts/smart-cast-sink-stability/p-5/neg/1.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/type-inference/smart-casts/smart-cast-sink-stability/p-5/pos/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/type-inference/smart-casts/smart-cast-sink-stability/p-5/pos/1.1.fir.kt
index 2703fb20494..b48312d5f0d 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/type-inference/smart-casts/smart-cast-sink-stability/p-5/pos/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/type-inference/smart-casts/smart-cast-sink-stability/p-5/pos/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/type-inference/smart-casts/smart-cast-sink-stability/p-5/pos/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/type-inference/smart-casts/smart-cast-sink-stability/p-5/pos/1.1.kt
index 0a1bbc13cb5..1bc5e335826 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/type-inference/smart-casts/smart-cast-sink-stability/p-5/pos/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/type-inference/smart-casts/smart-cast-sink-stability/p-5/pos/1.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/type-system/introduction-1/p-6/neg/2.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/type-system/introduction-1/p-6/neg/2.1.fir.kt
index ef0a817836b..0561bee122f 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/type-system/introduction-1/p-6/neg/2.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/type-system/introduction-1/p-6/neg/2.1.fir.kt
@@ -1,5 +1,4 @@
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER
-// !LANGUAGE: +NewInference
 // SKIP_TXT
 
 // TESTCASE NUMBER: 1
diff --git a/compiler/tests-spec/testData/diagnostics/linked/type-system/introduction-1/p-6/neg/2.1.kt b/compiler/tests-spec/testData/diagnostics/linked/type-system/introduction-1/p-6/neg/2.1.kt
index 971da25aaea..96ca704041d 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/type-system/introduction-1/p-6/neg/2.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/type-system/introduction-1/p-6/neg/2.1.kt
@@ -1,5 +1,4 @@
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER
-// !LANGUAGE: +NewInference
 // SKIP_TXT
 
 /*
diff --git a/compiler/tests-spec/testData/diagnostics/linked/type-system/introduction-1/p-6/neg/2.2.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/type-system/introduction-1/p-6/neg/2.2.fir.kt
index b16e30f969c..fa33372e65d 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/type-system/introduction-1/p-6/neg/2.2.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/type-system/introduction-1/p-6/neg/2.2.fir.kt
@@ -1,5 +1,4 @@
 // !DIAGNOSTICS: -UNUSED_PARAMETER -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE
-// !LANGUAGE: +NewInference
 // SKIP_TXT
 
 // TESTCASE NUMBER: 1
diff --git a/compiler/tests-spec/testData/diagnostics/linked/type-system/introduction-1/p-6/neg/2.2.kt b/compiler/tests-spec/testData/diagnostics/linked/type-system/introduction-1/p-6/neg/2.2.kt
index aff2d8d4aa5..c530d2e76a2 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/type-system/introduction-1/p-6/neg/2.2.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/type-system/introduction-1/p-6/neg/2.2.kt
@@ -1,5 +1,4 @@
 // !DIAGNOSTICS: -UNUSED_PARAMETER -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE
-// !LANGUAGE: +NewInference
 // SKIP_TXT
 
 /*
diff --git a/compiler/tests-spec/testData/diagnostics/linked/type-system/introduction-1/p-6/neg/2.3.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/type-system/introduction-1/p-6/neg/2.3.fir.kt
index a948bb709d6..28b1a89f29a 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/type-system/introduction-1/p-6/neg/2.3.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/type-system/introduction-1/p-6/neg/2.3.fir.kt
@@ -1,5 +1,4 @@
 // !DIAGNOSTICS: -UNUSED_PARAMETER -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE
-// !LANGUAGE: +NewInference
 // SKIP_TXT
 
 // TESTCASE NUMBER: 1
diff --git a/compiler/tests-spec/testData/diagnostics/linked/type-system/introduction-1/p-6/neg/2.3.kt b/compiler/tests-spec/testData/diagnostics/linked/type-system/introduction-1/p-6/neg/2.3.kt
index 753826d60ed..1c3002311a9 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/type-system/introduction-1/p-6/neg/2.3.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/type-system/introduction-1/p-6/neg/2.3.kt
@@ -1,5 +1,4 @@
 // !DIAGNOSTICS: -UNUSED_PARAMETER -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE
-// !LANGUAGE: +NewInference
 // SKIP_TXT
 
 /*
diff --git a/compiler/tests-spec/testData/diagnostics/linked/type-system/introduction-1/p-8/pos/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/type-system/introduction-1/p-8/pos/1.1.fir.kt
index 1d21db0425f..35e1899dd64 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/type-system/introduction-1/p-8/pos/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/type-system/introduction-1/p-8/pos/1.1.fir.kt
@@ -1,5 +1,4 @@
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER
-// !LANGUAGE: +NewInference
 // SKIP_TXT
 
 // TESTCASE NUMBER: 1
diff --git a/compiler/tests-spec/testData/diagnostics/linked/type-system/introduction-1/p-8/pos/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/type-system/introduction-1/p-8/pos/1.1.kt
index 95b5e697557..3d7353134bc 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/type-system/introduction-1/p-8/pos/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/type-system/introduction-1/p-8/pos/1.1.kt
@@ -1,5 +1,4 @@
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER
-// !LANGUAGE: +NewInference
 // SKIP_TXT
 
 /*
diff --git a/compiler/tests-spec/testData/diagnostics/linked/type-system/introduction-1/p-8/pos/2.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/type-system/introduction-1/p-8/pos/2.1.fir.kt
index 21eb11f8482..cf47a1b8225 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/type-system/introduction-1/p-8/pos/2.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/type-system/introduction-1/p-8/pos/2.1.fir.kt
@@ -1,5 +1,4 @@
 // !DIAGNOSTICS: -UNUSED_VARIABLE -UNREACHABLE_CODE
-// !LANGUAGE: +NewInference
 // SKIP_TXT
 
 // TESTCASE NUMBER: 1
diff --git a/compiler/tests-spec/testData/diagnostics/linked/type-system/introduction-1/p-8/pos/2.1.kt b/compiler/tests-spec/testData/diagnostics/linked/type-system/introduction-1/p-8/pos/2.1.kt
index 107a436049f..6b887f1b1dc 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/type-system/introduction-1/p-8/pos/2.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/type-system/introduction-1/p-8/pos/2.1.kt
@@ -1,5 +1,4 @@
 // !DIAGNOSTICS: -UNUSED_VARIABLE -UNREACHABLE_CODE
-// !LANGUAGE: +NewInference
 // SKIP_TXT
 
 /*
diff --git a/compiler/tests-spec/testData/diagnostics/linked/type-system/subtyping/subtyping-for-intersection-types/p-1/pos/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/type-system/subtyping/subtyping-for-intersection-types/p-1/pos/1.1.fir.kt
index fc074703509..26409818711 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/type-system/subtyping/subtyping-for-intersection-types/p-1/pos/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/type-system/subtyping/subtyping-for-intersection-types/p-1/pos/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/type-system/subtyping/subtyping-for-intersection-types/p-1/pos/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/type-system/subtyping/subtyping-for-intersection-types/p-1/pos/1.1.kt
index 7bd51dddcc7..00155fb7d04 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/type-system/subtyping/subtyping-for-intersection-types/p-1/pos/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/type-system/subtyping/subtyping-for-intersection-types/p-1/pos/1.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/type-system/subtyping/subtyping-for-intersection-types/p-1/pos/1.2.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/type-system/subtyping/subtyping-for-intersection-types/p-1/pos/1.2.fir.kt
index ceddf4461d9..0047eaf7ebf 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/type-system/subtyping/subtyping-for-intersection-types/p-1/pos/1.2.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/type-system/subtyping/subtyping-for-intersection-types/p-1/pos/1.2.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/type-system/subtyping/subtyping-for-intersection-types/p-1/pos/1.2.kt b/compiler/tests-spec/testData/diagnostics/linked/type-system/subtyping/subtyping-for-intersection-types/p-1/pos/1.2.kt
index 920a0e4fe44..bf6b752f631 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/type-system/subtyping/subtyping-for-intersection-types/p-1/pos/1.2.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/type-system/subtyping/subtyping-for-intersection-types/p-1/pos/1.2.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/type-system/subtyping/subtyping-for-intersection-types/p-1/pos/1.3.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/type-system/subtyping/subtyping-for-intersection-types/p-1/pos/1.3.fir.kt
index b9c07f93002..a59a20b142d 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/type-system/subtyping/subtyping-for-intersection-types/p-1/pos/1.3.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/type-system/subtyping/subtyping-for-intersection-types/p-1/pos/1.3.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/type-system/subtyping/subtyping-for-intersection-types/p-1/pos/1.3.kt b/compiler/tests-spec/testData/diagnostics/linked/type-system/subtyping/subtyping-for-intersection-types/p-1/pos/1.3.kt
index b3011589756..e06ec5eb109 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/type-system/subtyping/subtyping-for-intersection-types/p-1/pos/1.3.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/type-system/subtyping/subtyping-for-intersection-types/p-1/pos/1.3.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/type-system/subtyping/subtyping-rules/p-2/pos/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/type-system/subtyping/subtyping-rules/p-2/pos/1.1.fir.kt
index 5eb1d27fb8e..18676df18d2 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/type-system/subtyping/subtyping-rules/p-2/pos/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/type-system/subtyping/subtyping-rules/p-2/pos/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNREACHABLE_CODE -UNUSED_PARAMETER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/type-system/subtyping/subtyping-rules/p-2/pos/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/type-system/subtyping/subtyping-rules/p-2/pos/1.1.kt
index 2ae7ac7f479..2c27b16798f 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/type-system/subtyping/subtyping-rules/p-2/pos/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/type-system/subtyping/subtyping-rules/p-2/pos/1.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNREACHABLE_CODE -UNUSED_PARAMETER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/type-system/type-contexts-and-scopes/inner-and-nested-type-contexts/p-1/neg/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/type-system/type-contexts-and-scopes/inner-and-nested-type-contexts/p-1/neg/1.1.fir.kt
index 2a1aecaf916..d111fa9916e 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/type-system/type-contexts-and-scopes/inner-and-nested-type-contexts/p-1/neg/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/type-system/type-contexts-and-scopes/inner-and-nested-type-contexts/p-1/neg/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -USELESS_IS_CHECK
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/type-system/type-contexts-and-scopes/inner-and-nested-type-contexts/p-1/neg/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/type-system/type-contexts-and-scopes/inner-and-nested-type-contexts/p-1/neg/1.1.kt
index 16636a4ce97..6010f40d0cb 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/type-system/type-contexts-and-scopes/inner-and-nested-type-contexts/p-1/neg/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/type-system/type-contexts-and-scopes/inner-and-nested-type-contexts/p-1/neg/1.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -USELESS_IS_CHECK
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/type-system/type-contexts-and-scopes/inner-and-nested-type-contexts/p-1/neg/1.2.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/type-system/type-contexts-and-scopes/inner-and-nested-type-contexts/p-1/neg/1.2.fir.kt
index 65f4729d047..b07eb3379cb 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/type-system/type-contexts-and-scopes/inner-and-nested-type-contexts/p-1/neg/1.2.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/type-system/type-contexts-and-scopes/inner-and-nested-type-contexts/p-1/neg/1.2.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -USELESS_IS_CHECK -IMPLICIT_CAST_TO_ANY
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/type-system/type-contexts-and-scopes/inner-and-nested-type-contexts/p-1/neg/1.2.kt b/compiler/tests-spec/testData/diagnostics/linked/type-system/type-contexts-and-scopes/inner-and-nested-type-contexts/p-1/neg/1.2.kt
index 39b55d11c30..b557ecf4055 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/type-system/type-contexts-and-scopes/inner-and-nested-type-contexts/p-1/neg/1.2.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/type-system/type-contexts-and-scopes/inner-and-nested-type-contexts/p-1/neg/1.2.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -USELESS_IS_CHECK -IMPLICIT_CAST_TO_ANY
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/type-system/type-contexts-and-scopes/inner-and-nested-type-contexts/p-1/neg/2.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/type-system/type-contexts-and-scopes/inner-and-nested-type-contexts/p-1/neg/2.1.fir.kt
index d90e054059b..3fa5d5b22c0 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/type-system/type-contexts-and-scopes/inner-and-nested-type-contexts/p-1/neg/2.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/type-system/type-contexts-and-scopes/inner-and-nested-type-contexts/p-1/neg/2.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/type-system/type-contexts-and-scopes/inner-and-nested-type-contexts/p-1/neg/2.1.kt b/compiler/tests-spec/testData/diagnostics/linked/type-system/type-contexts-and-scopes/inner-and-nested-type-contexts/p-1/neg/2.1.kt
index f7ad9352c03..05ff7ca7dc2 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/type-system/type-contexts-and-scopes/inner-and-nested-type-contexts/p-1/neg/2.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/type-system/type-contexts-and-scopes/inner-and-nested-type-contexts/p-1/neg/2.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/type-system/type-contexts-and-scopes/inner-and-nested-type-contexts/p-1/pos/1.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/type-system/type-contexts-and-scopes/inner-and-nested-type-contexts/p-1/pos/1.1.fir.kt
index 8f50f965e0d..48246bc07d3 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/type-system/type-contexts-and-scopes/inner-and-nested-type-contexts/p-1/pos/1.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/type-system/type-contexts-and-scopes/inner-and-nested-type-contexts/p-1/pos/1.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -USELESS_IS_CHECK -UNCHECKED_CAST
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/type-system/type-contexts-and-scopes/inner-and-nested-type-contexts/p-1/pos/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/type-system/type-contexts-and-scopes/inner-and-nested-type-contexts/p-1/pos/1.1.kt
index ae196189434..91013f0334c 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/type-system/type-contexts-and-scopes/inner-and-nested-type-contexts/p-1/pos/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/type-system/type-contexts-and-scopes/inner-and-nested-type-contexts/p-1/pos/1.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -USELESS_IS_CHECK -UNCHECKED_CAST
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/type-system/type-contexts-and-scopes/inner-and-nested-type-contexts/p-1/pos/1.2.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/type-system/type-contexts-and-scopes/inner-and-nested-type-contexts/p-1/pos/1.2.fir.kt
index e072ba50531..21cc535386b 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/type-system/type-contexts-and-scopes/inner-and-nested-type-contexts/p-1/pos/1.2.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/type-system/type-contexts-and-scopes/inner-and-nested-type-contexts/p-1/pos/1.2.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -USELESS_IS_CHECK
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/type-system/type-contexts-and-scopes/inner-and-nested-type-contexts/p-1/pos/1.2.kt b/compiler/tests-spec/testData/diagnostics/linked/type-system/type-contexts-and-scopes/inner-and-nested-type-contexts/p-1/pos/1.2.kt
index 2c3df56d19b..40f81ff3b45 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/type-system/type-contexts-and-scopes/inner-and-nested-type-contexts/p-1/pos/1.2.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/type-system/type-contexts-and-scopes/inner-and-nested-type-contexts/p-1/pos/1.2.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -USELESS_IS_CHECK
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/type-system/type-kinds/built-in-types/kotlin.any/p-1/pos/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/type-system/type-kinds/built-in-types/kotlin.any/p-1/pos/1.1.kt
index 135a8032dd8..09652983ae2 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/type-system/type-kinds/built-in-types/kotlin.any/p-1/pos/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/type-system/type-kinds/built-in-types/kotlin.any/p-1/pos/1.1.kt
@@ -1,6 +1,5 @@
 // FIR_IDENTICAL
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER
-// !LANGUAGE: +NewInference
 // SKIP_TXT
 
 /*
diff --git a/compiler/tests-spec/testData/diagnostics/linked/type-system/type-kinds/built-in-types/kotlin.any/p-1/pos/1.2.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/type-system/type-kinds/built-in-types/kotlin.any/p-1/pos/1.2.fir.kt
index 8b3179ac941..f67fbb7fa4a 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/type-system/type-kinds/built-in-types/kotlin.any/p-1/pos/1.2.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/type-system/type-kinds/built-in-types/kotlin.any/p-1/pos/1.2.fir.kt
@@ -1,5 +1,4 @@
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER
-// !LANGUAGE: +NewInference
 // SKIP_TXT
 
 // TESTCASE NUMBER: 1
diff --git a/compiler/tests-spec/testData/diagnostics/linked/type-system/type-kinds/built-in-types/kotlin.any/p-1/pos/1.2.kt b/compiler/tests-spec/testData/diagnostics/linked/type-system/type-kinds/built-in-types/kotlin.any/p-1/pos/1.2.kt
index 2870ee22aa2..7505c68edbf 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/type-system/type-kinds/built-in-types/kotlin.any/p-1/pos/1.2.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/type-system/type-kinds/built-in-types/kotlin.any/p-1/pos/1.2.kt
@@ -1,5 +1,4 @@
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER
-// !LANGUAGE: +NewInference
 // SKIP_TXT
 
 /*
diff --git a/compiler/tests-spec/testData/diagnostics/linked/type-system/type-kinds/built-in-types/kotlin.nothing/p-1/neg/2.1.fir.kt b/compiler/tests-spec/testData/diagnostics/linked/type-system/type-kinds/built-in-types/kotlin.nothing/p-1/neg/2.1.fir.kt
index d4157f10bd7..3b932e45111 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/type-system/type-kinds/built-in-types/kotlin.nothing/p-1/neg/2.1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/type-system/type-kinds/built-in-types/kotlin.nothing/p-1/neg/2.1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -UNREACHABLE_CODE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/type-system/type-kinds/built-in-types/kotlin.nothing/p-1/neg/2.1.kt b/compiler/tests-spec/testData/diagnostics/linked/type-system/type-kinds/built-in-types/kotlin.nothing/p-1/neg/2.1.kt
index 83220743b3c..0e16d432144 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/type-system/type-kinds/built-in-types/kotlin.nothing/p-1/neg/2.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/type-system/type-kinds/built-in-types/kotlin.nothing/p-1/neg/2.1.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -UNREACHABLE_CODE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/linked/type-system/type-kinds/built-in-types/kotlin.nothing/p-1/pos/1.1.kt b/compiler/tests-spec/testData/diagnostics/linked/type-system/type-kinds/built-in-types/kotlin.nothing/p-1/pos/1.1.kt
index a385f6588e9..7c5db85401f 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/type-system/type-kinds/built-in-types/kotlin.nothing/p-1/pos/1.1.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/type-system/type-kinds/built-in-types/kotlin.nothing/p-1/pos/1.1.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -UNREACHABLE_CODE
 
 // SKIP_TXT
diff --git a/compiler/tests-spec/testData/diagnostics/linked/type-system/type-kinds/built-in-types/kotlin.nothing/p-1/pos/1.2.kt b/compiler/tests-spec/testData/diagnostics/linked/type-system/type-kinds/built-in-types/kotlin.nothing/p-1/pos/1.2.kt
index 311c1b7cbd7..9fc04541ed4 100644
--- a/compiler/tests-spec/testData/diagnostics/linked/type-system/type-kinds/built-in-types/kotlin.nothing/p-1/pos/1.2.kt
+++ b/compiler/tests-spec/testData/diagnostics/linked/type-system/type-kinds/built-in-types/kotlin.nothing/p-1/pos/1.2.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION -UNREACHABLE_CODE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/1.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/1.fir.kt
index 847be5fc43d..61c5a79ca48 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE
 // SKIP_TXT
 // WITH_EXTENDED_CHECKERS
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/1.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/1.kt
index 4b921a689f3..f25c08da264 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/1.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/1.kt
@@ -1,5 +1,4 @@
 // FIR_IDE_IGNORE
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/10.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/10.fir.kt
index dc9d5286641..0d3db5c98f7 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/10.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/10.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/10.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/10.kt
index 09f083015c2..b7a74f5fa0e 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/10.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/10.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/11.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/11.fir.kt
index bf17c15b74e..5229e0235d5 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/11.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/11.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/11.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/11.kt
index 8ada03801dd..a2e5d1af3fd 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/11.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/11.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/12.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/12.fir.kt
index 6440889339a..b20c22627ce 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/12.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/12.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/12.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/12.kt
index 068f21b3017..3d0aee4caab 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/12.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/12.kt
@@ -1,5 +1,4 @@
 
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/13.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/13.fir.kt
index 290eb0b6afa..afecbebb145 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/13.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/13.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/13.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/13.kt
index abbe8525f3f..f6f485c692a 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/13.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/13.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/14.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/14.fir.kt
index b28805e7c6b..e56242be81c 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/14.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/14.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/14.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/14.kt
index b7c1050f3f5..64805369b76 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/14.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/14.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/15.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/15.fir.kt
index 6b314525d7e..8b7d0c50ebe 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/15.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/15.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/15.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/15.kt
index 9c651f233c4..e763d9d36b8 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/15.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/15.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/16.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/16.fir.kt
index a2c7fd29ff5..ccfb8d5d8ea 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/16.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/16.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/16.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/16.kt
index 9acb43794ff..8f26eeba1eb 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/16.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/16.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/17.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/17.fir.kt
index 8a04e1124d6..17c6b93d487 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/17.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/17.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/17.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/17.kt
index 62cf484da3b..8fa6a1fb0e7 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/17.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/17.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/18.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/18.kt
index d85dc1a2f76..c44358706de 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/18.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/18.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/19.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/19.fir.kt
index efb60737fb0..69ca6668c43 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/19.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/19.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE -UNUSED_VALUE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/19.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/19.kt
index 7a38e862a3a..eb97f959628 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/19.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/19.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE -UNUSED_VALUE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/2.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/2.fir.kt
index f0581369fc6..738a2cc1663 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/2.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/2.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/2.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/2.kt
index 3f1990b5596..c77af3effcf 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/2.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/2.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/20.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/20.fir.kt
index b9e440ebfbe..8f6074505ff 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/20.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/20.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE -UNUSED_VALUE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/20.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/20.kt
index 6650efd957f..e331adea47c 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/20.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/20.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE -UNUSED_VALUE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/21.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/21.fir.kt
index 310aa016536..d8f71881074 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/21.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/21.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE -UNUSED_VALUE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/21.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/21.kt
index fc78c28c868..13d04ff0007 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/21.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/21.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE -UNUSED_VALUE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/22.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/22.fir.kt
index 2f499575450..bfa8fa99905 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/22.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/22.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE -UNUSED_VALUE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/22.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/22.kt
index 8ba4aa6e9cf..75a279d81aa 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/22.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/22.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE -UNUSED_VALUE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/23.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/23.fir.kt
index de3388e7195..22c486bdc43 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/23.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/23.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE -UNUSED_VALUE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/23.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/23.kt
index cf28fb04692..86a97d6962f 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/23.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/23.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE -UNUSED_VALUE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/24.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/24.fir.kt
index 5e66ecded69..990629000cb 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/24.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/24.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE -UNUSED_VALUE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/24.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/24.kt
index e636529ffd2..2c07f49dcfd 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/24.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/24.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE -UNUSED_VALUE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/25.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/25.fir.kt
index 07953b467f5..7fb1dae812e 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/25.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/25.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE -UNUSED_VALUE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/25.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/25.kt
index a791edfa358..25de00cbb04 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/25.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/25.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE -UNUSED_VALUE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/26.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/26.fir.kt
index c4177407b14..a70a5c1ea9c 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/26.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/26.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE -UNUSED_VALUE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/26.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/26.kt
index 1e58ac70b24..bfd019f6cd9 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/26.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/26.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE -UNUSED_VALUE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/27.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/27.fir.kt
index 8fc1dc6a2e8..7eabae3ebab 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/27.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/27.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE -UNUSED_VALUE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/27.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/27.kt
index a6a29305acc..72c2b7df575 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/27.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/27.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE -UNUSED_VALUE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/28.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/28.fir.kt
index fd59f42ba7d..4045bdcfc5b 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/28.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/28.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE -UNUSED_VALUE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/28.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/28.kt
index 10a6b4aa8ca..a960f042001 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/28.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/28.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE -UNUSED_VALUE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/29.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/29.fir.kt
index b6580141e18..8d379408107 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/29.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/29.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/29.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/29.kt
index ec9bed03f30..e7d17615814 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/29.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/29.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/3.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/3.fir.kt
index ec3aad782b7..7c97ee79652 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/3.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/3.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNREACHABLE_CODE
 // SKIP_TXT
 // WITH_EXTENDED_CHECKERS
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/3.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/3.kt
index 1385b21a2ae..ac93878e19e 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/3.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/3.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/30.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/30.fir.kt
index c2d04c6db1d..51b9430afb5 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/30.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/30.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE -UNUSED_VALUE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/30.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/30.kt
index e6af9badd71..c728cbaf77a 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/30.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/30.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE -UNUSED_VALUE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/31.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/31.fir.kt
index 80a98856ef4..f252b8a1f8e 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/31.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/31.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE -UNUSED_VALUE -VARIABLE_WITH_REDUNDANT_INITIALIZER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/31.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/31.kt
index 355b3d1d126..e3765a7923e 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/31.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/31.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE -UNUSED_VALUE -VARIABLE_WITH_REDUNDANT_INITIALIZER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/32.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/32.fir.kt
index 74f3137afa2..bda64361c71 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/32.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/32.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_VALUE -VARIABLE_WITH_REDUNDANT_INITIALIZER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/32.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/32.kt
index ec63f6c10cc..8053405f368 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/32.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/32.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_VALUE -VARIABLE_WITH_REDUNDANT_INITIALIZER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/33.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/33.fir.kt
index 946237a5cfe..ccdfa442312 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/33.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/33.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_VALUE -VARIABLE_WITH_REDUNDANT_INITIALIZER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/33.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/33.kt
index 07a3c12c1c8..755bffbc77d 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/33.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/33.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_VALUE -VARIABLE_WITH_REDUNDANT_INITIALIZER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/34.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/34.fir.kt
index da9b5bad900..97b3e40e8c8 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/34.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/34.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE -UNUSED_VALUE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/34.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/34.kt
index b9b63dc3007..0d26759dd40 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/34.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/34.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE -UNUSED_VALUE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/35.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/35.fir.kt
index f11eb436217..7ca12988f2a 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/35.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/35.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE -UNUSED_VALUE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/35.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/35.kt
index 68b47bcf7b3..3e3afea391e 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/35.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/35.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE -UNUSED_VALUE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/36.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/36.fir.kt
index 5badd939ed2..8bafd652a97 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/36.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/36.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE -UNUSED_VALUE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/36.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/36.kt
index 15b60cdb543..41e5fb84031 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/36.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/36.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE -UNUSED_VALUE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/37.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/37.fir.kt
index 5f1948ef40d..cade362f053 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/37.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/37.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_VALUE -VARIABLE_WITH_REDUNDANT_INITIALIZER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/37.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/37.kt
index 28d6eda7a54..2ed3f3cc63d 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/37.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/37.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_VALUE -VARIABLE_WITH_REDUNDANT_INITIALIZER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/38.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/38.fir.kt
index 0bb88bd4726..b2bc2aa2116 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/38.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/38.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_VALUE -VARIABLE_WITH_REDUNDANT_INITIALIZER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/38.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/38.kt
index fcb26a197a0..338451dbd48 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/38.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/38.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_VALUE -VARIABLE_WITH_REDUNDANT_INITIALIZER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/39.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/39.fir.kt
index 434d6567a63..ef24f598852 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/39.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/39.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_VALUE -VARIABLE_WITH_REDUNDANT_INITIALIZER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/39.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/39.kt
index 154169aea62..06075700b53 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/39.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/39.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_VALUE -VARIABLE_WITH_REDUNDANT_INITIALIZER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/4.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/4.fir.kt
index 2bf0f6187a1..0c7ef71b92a 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/4.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/4.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/4.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/4.kt
index 89360a89d13..8337b401d09 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/4.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/4.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/40.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/40.fir.kt
index d8d80673ed2..13bf9e4186e 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/40.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/40.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_VALUE -VARIABLE_WITH_REDUNDANT_INITIALIZER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/40.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/40.kt
index 343ca2a464a..711139e8db2 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/40.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/40.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_VALUE -VARIABLE_WITH_REDUNDANT_INITIALIZER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/41.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/41.fir.kt
index 930c7cabe0e..9521e6c7a4c 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/41.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/41.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_VALUE -VARIABLE_WITH_REDUNDANT_INITIALIZER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/41.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/41.kt
index e10cb2f8690..99e8905ada4 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/41.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/41.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_VALUE -VARIABLE_WITH_REDUNDANT_INITIALIZER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/42.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/42.fir.kt
index 5b1c4dac0bf..2029cfca36d 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/42.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/42.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_VALUE -VARIABLE_WITH_REDUNDANT_INITIALIZER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/42.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/42.kt
index 9219df3bc1b..e97ac1b5eb4 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/42.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/42.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_VALUE -VARIABLE_WITH_REDUNDANT_INITIALIZER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/43.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/43.fir.kt
index b0bb7f7457c..cf1a691e51c 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/43.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/43.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_VALUE -VARIABLE_WITH_REDUNDANT_INITIALIZER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/43.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/43.kt
index b458cfa95cf..0351ad9cf03 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/43.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/43.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_VALUE -VARIABLE_WITH_REDUNDANT_INITIALIZER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/44.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/44.fir.kt
index 3ac321adc86..e508fce8e1f 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/44.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/44.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/44.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/44.kt
index aa1bb038aae..4c990631f8c 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/44.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/44.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/45.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/45.fir.kt
index ab7a6254b79..afdac810dfc 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/45.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/45.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_VALUE -VARIABLE_WITH_REDUNDANT_INITIALIZER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/45.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/45.kt
index 11384270907..0132601d477 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/45.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/45.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_VALUE -VARIABLE_WITH_REDUNDANT_INITIALIZER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/5.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/5.fir.kt
index be378bedfc5..3fd2c9ef798 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/5.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/5.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/5.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/5.kt
index 1d239a2ab71..c8b749dabbc 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/5.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/5.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/6.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/6.fir.kt
index cd02158b2a5..fc1cd1cbb32 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/6.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/6.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 // WITH_EXTENDED_CHECKERS
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/6.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/6.kt
index 2d077de237b..208545c6ede 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/6.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/6.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/7.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/7.fir.kt
index b28805e7c6b..e56242be81c 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/7.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/7.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/7.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/7.kt
index 91d167c64f4..f32ff535180 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/7.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/7.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/8.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/8.fir.kt
index 0ffda3f9cbf..64668fcac49 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/8.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/8.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/8.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/8.kt
index a0ad4bd5bdd..1a53aafb23a 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/8.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/8.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/9.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/9.fir.kt
index 52d4a1dabef..eac9f55adf6 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/9.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/9.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/9.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/9.kt
index a86c6daec94..c7e72a97b82 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/9.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/neg/9.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/1.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/1.fir.kt
index 2a9abd746f8..b8194f58efd 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/1.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/1.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 // TODO: https://youtrack.jetbrains.com/issue/KT-49862
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/1.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/1.kt
index 6bf0f10c906..c4e93ad10b5 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/1.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/1.kt
@@ -1,5 +1,4 @@
 // FIR_IDE_IGNORE
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/10.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/10.fir.kt
index f6096db5c39..428316c2381 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/10.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/10.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/10.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/10.kt
index 9cc7acf7d1d..edf9ee7d52e 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/10.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/10.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/11.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/11.fir.kt
index f65bd14affc..4ccf2e150e2 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/11.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/11.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/11.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/11.kt
index 06f1e58c716..1b123bb0d42 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/11.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/11.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/12.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/12.fir.kt
index 25108cfa8ce..cd379d4a540 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/12.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/12.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/12.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/12.kt
index 9fedede381b..7b08141ca5b 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/12.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/12.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/13.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/13.fir.kt
index d31cce79870..b56100b5cf8 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/13.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/13.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/13.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/13.kt
index c781d0f2b60..fcbd547f9d9 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/13.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/13.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/14.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/14.fir.kt
index d3d0b076ab6..ad17b5af95b 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/14.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/14.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/14.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/14.kt
index 774338f6004..ddb79a29fd3 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/14.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/14.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/15.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/15.fir.kt
index 6c011ad70cc..7e0ece94ee2 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/15.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/15.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/15.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/15.kt
index 83d373a4560..a68aec272f9 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/15.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/15.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/16.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/16.fir.kt
index 6b12e784316..2f6d3ca7233 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/16.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/16.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION, -NAME_SHADOWING, -UNUSED_VARIABLE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/16.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/16.kt
index 7a9534b4292..763f4cd5072 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/16.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/16.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION, -NAME_SHADOWING, -UNUSED_VARIABLE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/17.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/17.fir.kt
index 7c8b5040f72..d9d3a22427a 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/17.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/17.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/17.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/17.kt
index b5d86277a2b..6cbc9e81c6d 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/17.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/17.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/18.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/18.fir.kt
index 71badfc66e5..d43c936a111 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/18.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/18.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/18.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/18.kt
index f17fe50ee8c..1c457046e1c 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/18.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/18.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/19.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/19.fir.kt
index 35a9c2640f8..e9451bceef0 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/19.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/19.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 // WITH_EXTENDED_CHECKERS
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/19.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/19.kt
index e9362cd1552..c4ad4f603e3 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/19.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/19.kt
@@ -1,5 +1,4 @@
 // FIR_IDE_IGNORE
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/2.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/2.fir.kt
index 638694972bf..7d00dd74973 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/2.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/2.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/2.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/2.kt
index d8c3ebc1ff2..d6b1ea4820d 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/2.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/2.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/20.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/20.fir.kt
index 9ca2c17f53e..79e93eccd48 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/20.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/20.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 // WITH_EXTENDED_CHECKERS
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/20.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/20.kt
index 044de9c1ae3..a450f13a266 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/20.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/20.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/21.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/21.fir.kt
index c3c827abd37..61ad5574b16 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/21.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/21.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 // WITH_EXTENDED_CHECKERS
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/21.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/21.kt
index 2f1f3aae8d6..0b46823fbc2 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/21.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/21.kt
@@ -1,5 +1,4 @@
 // FIR_IDE_IGNORE
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/22.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/22.fir.kt
index e88a7290a60..a6e80d8b9ce 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/22.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/22.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 // WITH_EXTENDED_CHECKERS
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/22.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/22.kt
index 008d0136316..d4cf9185754 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/22.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/22.kt
@@ -1,5 +1,4 @@
 // FIR_IDE_IGNORE
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/23.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/23.fir.kt
index afcff329124..04361b28e0e 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/23.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/23.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/23.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/23.kt
index 9572944672a..7e44046d974 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/23.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/23.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/24.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/24.fir.kt
index 9b9fe2e4215..d02d75873c5 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/24.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/24.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/24.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/24.kt
index 5cd0a28212a..f29303c7624 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/24.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/24.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/25.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/25.fir.kt
index 4c2ecd3ba1c..e1da0763c17 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/25.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/25.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/25.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/25.kt
index e4d03b1f844..fc0cdd08b33 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/25.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/25.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/26.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/26.fir.kt
index 4c2ecd3ba1c..e1da0763c17 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/26.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/26.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/26.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/26.kt
index 1cd06b01dc1..0acbcee7696 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/26.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/26.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/27.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/27.fir.kt
index 4c2ecd3ba1c..e1da0763c17 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/27.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/27.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/27.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/27.kt
index 448a443fe9e..879fc41fb7a 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/27.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/27.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/28.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/28.fir.kt
index 1f17fa4759c..bffc15615b2 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/28.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/28.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/28.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/28.kt
index f6701c4ac3c..daf9560440d 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/28.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/28.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/29.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/29.fir.kt
index 67f12f4b2df..85556968d5e 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/29.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/29.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/29.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/29.kt
index ffb99d187e7..d49fc657413 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/29.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/29.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/3.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/3.fir.kt
index 9b12e7cf7ff..58da4fff46d 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/3.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/3.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE
 // SKIP_TXT
 // WITH_EXTENDED_CHECKERS
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/3.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/3.kt
index 70d9a0587e0..2b0a9b3eedd 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/3.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/3.kt
@@ -1,5 +1,4 @@
 // FIR_IDE_IGNORE
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/30.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/30.fir.kt
index 15b71e91636..bce710f566b 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/30.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/30.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/30.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/30.kt
index 0d75ed3143f..3d8cac5ceae 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/30.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/30.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/31.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/31.fir.kt
index 155cb6020fb..789478901af 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/31.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/31.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/31.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/31.kt
index a9ab1af9f94..9203f1c8600 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/31.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/31.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/32.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/32.fir.kt
index 742dd2d1a58..816971a85e6 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/32.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/32.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/32.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/32.kt
index 33dd4a74a76..74ffb0e3386 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/32.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/32.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/33.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/33.fir.kt
index a34ada3c25a..e4ee8b8f3b7 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/33.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/33.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/33.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/33.kt
index 2a9a477ccde..c681be70ae0 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/33.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/33.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/34.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/34.fir.kt
index be41491807b..0ef9aaa4584 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/34.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/34.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/34.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/34.kt
index a7a3a7c2ed4..20fc6333b74 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/34.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/34.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/35.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/35.fir.kt
index 67cbbdf5f8e..9e08a568f14 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/35.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/35.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/35.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/35.kt
index b72a2835930..4acaf18f249 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/35.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/35.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/36.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/36.fir.kt
index d4e64a42359..4295b1f3bef 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/36.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/36.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/36.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/36.kt
index 70697ed8b77..ca9a442bd09 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/36.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/36.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_VARIABLE -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/37.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/37.fir.kt
index d58cfcb56da..1867a5575a9 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/37.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/37.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/37.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/37.kt
index bed3cfa3584..3eef4207f5e 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/37.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/37.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/38.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/38.fir.kt
index ca662a0f54a..ea76d6eba04 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/38.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/38.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/38.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/38.kt
index 6fa9995d6c0..aefb4f2151f 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/38.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/38.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/39.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/39.fir.kt
index 106ef6aa8b7..e25b460c6dd 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/39.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/39.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/39.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/39.kt
index dd9ec9dc056..a0e46bb63ee 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/39.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/39.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/4.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/4.fir.kt
index fc0d4f33733..fc8cdaa6fbf 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/4.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/4.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/4.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/4.kt
index 60e58241783..eb20e7a99e4 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/4.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/4.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/40.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/40.fir.kt
index 98d850e5a4b..5ca85c0b3cc 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/40.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/40.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/40.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/40.kt
index 95e56d16b99..61d02abccb8 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/40.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/40.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/41.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/41.fir.kt
index 6533aebbcb4..6da6932b766 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/41.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/41.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/41.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/41.kt
index 3c16fb00041..f96becf7ed5 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/41.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/41.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/42.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/42.fir.kt
index 95b720d3919..f5e610b9336 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/42.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/42.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE -UNUSED_VALUE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/42.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/42.kt
index 726e3ffddde..d857c1ca467 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/42.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/42.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE -UNUSED_VALUE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/43.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/43.fir.kt
index 7a6dc84293a..6cffb47cc5d 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/43.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/43.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE -UNUSED_VALUE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/43.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/43.kt
index 383458ea4de..531a0b7625f 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/43.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/43.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE -UNUSED_VALUE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/44.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/44.fir.kt
index 04581dc3f46..205d5b4f3f1 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/44.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/44.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE -UNUSED_VALUE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/44.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/44.kt
index 33ff9f5984c..3e16932f69e 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/44.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/44.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE -UNUSED_VALUE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/45.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/45.fir.kt
index c57431be0c7..de8ba8f1d04 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/45.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/45.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE -UNUSED_VALUE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/45.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/45.kt
index 4a1ffa21321..5ed1150d4f8 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/45.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/45.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE -UNUSED_VALUE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/46.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/46.fir.kt
index 9ca3bad61bb..bba59923ecc 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/46.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/46.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE -UNUSED_VALUE
 // SKIP_TXT
 // WITH_REFLECT
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/46.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/46.kt
index 9f3e7614c77..713d3035cec 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/46.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/46.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE -UNUSED_VALUE
 // SKIP_TXT
 // WITH_REFLECT
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/47.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/47.fir.kt
index a828ccd41c3..94ead5f4a98 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/47.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/47.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/47.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/47.kt
index 575f1f8709b..705398213f0 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/47.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/47.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/48.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/48.fir.kt
index e07f194c83f..34e123fd67c 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/48.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/48.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE -UNUSED_VALUE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/48.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/48.kt
index 2dc3681b999..86837c63c89 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/48.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/48.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE -UNUSED_VALUE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/49.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/49.fir.kt
index 31a712b525e..8f99f82197a 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/49.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/49.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE -UNUSED_VALUE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/49.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/49.kt
index fafc1ba1c63..7478240ccb7 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/49.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/49.kt
@@ -1,5 +1,4 @@
 // FIR_IDE_IGNORE
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE -UNUSED_VALUE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/5.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/5.fir.kt
index 3217cc8c0f0..03af1ff8858 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/5.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/5.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/5.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/5.kt
index 418abfe7b11..41200637ba8 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/5.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/5.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/50.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/50.fir.kt
index aaaaf891562..4b8e4ea6ff8 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/50.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/50.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE -UNUSED_VALUE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/50.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/50.kt
index d34fd4501bb..112f047ea70 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/50.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/50.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE -UNUSED_VALUE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/51.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/51.fir.kt
index f50480df320..3460d059e3b 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/51.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/51.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE -UNUSED_VALUE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/51.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/51.kt
index 1ec53518047..9d40c4f2f74 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/51.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/51.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE -UNUSED_VALUE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/52.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/52.fir.kt
index 6e911ccbe5e..48f1d63f1ad 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/52.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/52.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_VALUE -VARIABLE_WITH_REDUNDANT_INITIALIZER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/52.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/52.kt
index c9cda6797a3..7fb845980fa 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/52.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/52.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_VALUE -VARIABLE_WITH_REDUNDANT_INITIALIZER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/53.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/53.fir.kt
index 913dccce201..c8d74bc455f 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/53.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/53.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_VALUE -VARIABLE_WITH_REDUNDANT_INITIALIZER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/53.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/53.kt
index c156aaee8a6..cf7766719c4 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/53.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/53.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_VALUE -VARIABLE_WITH_REDUNDANT_INITIALIZER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/54.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/54.fir.kt
index 3c99e4e7557..be88e8147a9 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/54.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/54.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_VALUE -VARIABLE_WITH_REDUNDANT_INITIALIZER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/55.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/55.fir.kt
index bfc7f45e5b0..c76300b1f3a 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/55.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/55.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_VALUE -VARIABLE_WITH_REDUNDANT_INITIALIZER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/55.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/55.kt
index e613ddbaffb..d4d2d03dce5 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/55.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/55.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_VALUE -VARIABLE_WITH_REDUNDANT_INITIALIZER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/56.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/56.fir.kt
index 3f6c5cc73dd..87f90dea46f 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/56.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/56.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_VALUE -VARIABLE_WITH_REDUNDANT_INITIALIZER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/56.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/56.kt
index 678ec05567b..22be2726f1e 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/56.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/56.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_VALUE -VARIABLE_WITH_REDUNDANT_INITIALIZER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/57.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/57.fir.kt
index be9cc1ac040..890a5329cd8 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/57.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/57.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_VALUE -VARIABLE_WITH_REDUNDANT_INITIALIZER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/57.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/57.kt
index 01a13afb341..2389572d936 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/57.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/57.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_VALUE -VARIABLE_WITH_REDUNDANT_INITIALIZER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/58.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/58.fir.kt
index 7e3f6a152fe..36ebdbb5c90 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/58.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/58.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE -UNUSED_VALUE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/58.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/58.kt
index 5c93af3a6c0..9187582ff0b 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/58.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/58.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE -UNUSED_VALUE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/59.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/59.fir.kt
index 45cc13364ce..38d0ea2640b 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/59.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/59.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE -UNUSED_VALUE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/59.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/59.kt
index 3c05da34bea..33c17c6c2b2 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/59.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/59.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE -UNUSED_VALUE
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/6.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/6.fir.kt
index e8267ef470c..a5cb28bc8c2 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/6.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/6.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE -UNREACHABLE_CODE -CAN_BE_VAL
 // SKIP_TXT
 // WITH_EXTENDED_CHECKERS
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/6.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/6.kt
index afbe1216f36..9b339b811c3 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/6.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/6.kt
@@ -1,5 +1,4 @@
 // FIR_IDE_IGNORE
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/60.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/60.fir.kt
index b63b8fe9fc8..a76d1e7b68b 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/60.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/60.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_VALUE -VARIABLE_WITH_REDUNDANT_INITIALIZER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/60.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/60.kt
index 9bdd6d29c89..f3008dadaf1 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/60.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/60.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_VALUE -VARIABLE_WITH_REDUNDANT_INITIALIZER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/61.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/61.fir.kt
index 8a9ae8436e3..d617a63d04e 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/61.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/61.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_VALUE -VARIABLE_WITH_REDUNDANT_INITIALIZER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/61.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/61.kt
index b8cd4467c37..ef96c80cf83 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/61.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/61.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_VALUE -VARIABLE_WITH_REDUNDANT_INITIALIZER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/62.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/62.fir.kt
index 83e7fad9b45..154474d078b 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/62.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/62.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_VALUE -VARIABLE_WITH_REDUNDANT_INITIALIZER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/62.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/62.kt
index 93fbf538adc..b79c1bf606b 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/62.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/62.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_VALUE -VARIABLE_WITH_REDUNDANT_INITIALIZER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/63.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/63.fir.kt
index 2a7943a7a4a..4731f44a32f 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/63.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/63.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_VALUE -VARIABLE_WITH_REDUNDANT_INITIALIZER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/63.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/63.kt
index 4ef11c09121..f38572c8a61 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/63.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/63.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_VALUE -VARIABLE_WITH_REDUNDANT_INITIALIZER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/64.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/64.fir.kt
index f4f1b64a782..3bfd2535e7d 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/64.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/64.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_VALUE -VARIABLE_WITH_REDUNDANT_INITIALIZER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/64.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/64.kt
index 13ab920fcf3..1cf12390c66 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/64.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/64.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_VALUE -VARIABLE_WITH_REDUNDANT_INITIALIZER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/65.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/65.fir.kt
index 8eddc40995f..cb236b54e29 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/65.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/65.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_VALUE -VARIABLE_WITH_REDUNDANT_INITIALIZER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/65.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/65.kt
index 29ff942585e..03dee157e85 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/65.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/65.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_VALUE -VARIABLE_WITH_REDUNDANT_INITIALIZER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/66.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/66.fir.kt
index 2496b391cdb..8503d28287a 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/66.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/66.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_VALUE -VARIABLE_WITH_REDUNDANT_INITIALIZER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/66.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/66.kt
index 6493bfa4165..80e82825e0c 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/66.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/66.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_VALUE -VARIABLE_WITH_REDUNDANT_INITIALIZER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/67.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/67.fir.kt
index 2c9c1cf71b6..46f098c0c62 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/67.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/67.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_VALUE -VARIABLE_WITH_REDUNDANT_INITIALIZER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/67.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/67.kt
index 24364cd4517..5e9dbdb32fb 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/67.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/67.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_VALUE -VARIABLE_WITH_REDUNDANT_INITIALIZER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/68.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/68.fir.kt
index e26dbca98c3..5369c43c34b 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/68.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/68.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // COMPARE_WITH_LIGHT_TREE
 // SKIP_TXT
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/68.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/68.kt
index 58a2a06e10d..132300b70f5 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/68.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/68.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // COMPARE_WITH_LIGHT_TREE
 // SKIP_TXT
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/69.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/69.fir.kt
index bac52516f50..2b458be5fa9 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/69.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/69.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/69.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/69.kt
index ece9ea18122..41b66856db3 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/69.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/69.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/7.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/7.fir.kt
index ff43fa00cb2..dc0535860f3 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/7.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/7.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_VARIABLE -UNREACHABLE_CODE -CAN_BE_VAL
 // SKIP_TXT
 // WITH_EXTENDED_CHECKERS
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/7.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/7.kt
index cb05a22a1cd..95ed7cfd2b0 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/7.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/7.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/70.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/70.fir.kt
index fc3f8ae9fb8..d2f43ae9e5a 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/70.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/70.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/70.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/70.kt
index 30238b8d4af..bba9ff52cae 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/70.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/70.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/71.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/71.fir.kt
index 6597b26741d..597229978a9 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/71.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/71.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_VALUE -VARIABLE_WITH_REDUNDANT_INITIALIZER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/71.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/71.kt
index 7d1ee7529ea..c13bd800edb 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/71.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/71.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_VALUE -VARIABLE_WITH_REDUNDANT_INITIALIZER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/72.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/72.fir.kt
index f774d904393..2c88fd9873a 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/72.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/72.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_VALUE -VARIABLE_WITH_REDUNDANT_INITIALIZER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/72.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/72.kt
index c3e51d15681..b2526ee8a7f 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/72.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/72.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_VALUE -VARIABLE_WITH_REDUNDANT_INITIALIZER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/73.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/73.fir.kt
index ab26341d5ef..52b7a3b0616 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/73.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/73.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_VALUE -VARIABLE_WITH_REDUNDANT_INITIALIZER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/73.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/73.kt
index 2fc94dbf927..db0874adce3 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/73.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/73.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_VALUE -VARIABLE_WITH_REDUNDANT_INITIALIZER
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/8.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/8.fir.kt
index 625861fb5f1..4c9addc0a43 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/8.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/8.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/8.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/8.kt
index a0fe401f1d5..4a7f85c9825 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/8.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/8.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/9.fir.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/9.fir.kt
index 7d65c8c7040..ba61554b849 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/9.fir.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/9.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/9.kt b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/9.kt
index e9ac2e93419..b28cde27ff7 100644
--- a/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/9.kt
+++ b/compiler/tests-spec/testData/diagnostics/notLinked/dfa/pos/9.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // !DIAGNOSTICS: -UNUSED_EXPRESSION
 // SKIP_TXT
 
diff --git a/js/js.translator/testData/box/expression/function/manglingImportedFromObjectWithNI.kt b/js/js.translator/testData/box/expression/function/manglingImportedFromObjectWithNI.kt
index ecdd8961a1e..0f57196aecd 100644
--- a/js/js.translator/testData/box/expression/function/manglingImportedFromObjectWithNI.kt
+++ b/js/js.translator/testData/box/expression/function/manglingImportedFromObjectWithNI.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +NewInference
 // EXPECTED_REACHABLE_NODES: 1329
 // Issue: KT-35904
 
diff --git a/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/hierarchical-mpp-multi-modules/bottom-mpp/build.gradle b/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/hierarchical-mpp-multi-modules/bottom-mpp/build.gradle
index d65bfa2e608..6da24091176 100644
--- a/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/hierarchical-mpp-multi-modules/bottom-mpp/build.gradle
+++ b/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/hierarchical-mpp-multi-modules/bottom-mpp/build.gradle
@@ -39,7 +39,7 @@ kotlin {
     targets.all {
         compilations.all {
             kotlinOptions {
-                freeCompilerArgs += ["-progressive", "-XXLanguage:+NewInference", "-XXLanguage:+SamConversionForKotlinFunctions", "-opt-in=kotlin.ExperimentalMultiplatform", "-Xskip-prerelease-check"]
+                freeCompilerArgs += ["-progressive", "-XXLanguage:+SamConversionForKotlinFunctions", "-opt-in=kotlin.ExperimentalMultiplatform", "-Xskip-prerelease-check"]
             }
         }
     }
diff --git a/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/hierarchical-mpp-multi-modules/plain-jvm/build.gradle b/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/hierarchical-mpp-multi-modules/plain-jvm/build.gradle
index a84766910fb..2455dd8dba2 100644
--- a/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/hierarchical-mpp-multi-modules/plain-jvm/build.gradle
+++ b/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/hierarchical-mpp-multi-modules/plain-jvm/build.gradle
@@ -15,7 +15,7 @@ dependencies {
 [compileKotlin, compileTestKotlin]*.configure {
     kotlinOptions {
         kotlinOptions.jvmTarget = "1.8"
-        freeCompilerArgs += ["-progressive", "-XXLanguage:+NewInference", "-XXLanguage:+SamConversionForKotlinFunctions"]
+        freeCompilerArgs += ["-progressive", "-XXLanguage:+SamConversionForKotlinFunctions"]
     }
 }
 
diff --git a/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/hierarchical-mpp-multi-modules/top-mpp/build.gradle b/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/hierarchical-mpp-multi-modules/top-mpp/build.gradle
index 3e98b33c556..445f64f8e8c 100644
--- a/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/hierarchical-mpp-multi-modules/top-mpp/build.gradle
+++ b/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/hierarchical-mpp-multi-modules/top-mpp/build.gradle
@@ -69,7 +69,7 @@ kotlin {
     targets.all {
         compilations.all {
             kotlinOptions {
-                freeCompilerArgs += ["-progressive", "-XXLanguage:+NewInference", "-XXLanguage:+SamConversionForKotlinFunctions", "-opt-in=kotlin.ExperimentalMultiplatform"]
+                freeCompilerArgs += ["-progressive", "-XXLanguage:+SamConversionForKotlinFunctions", "-opt-in=kotlin.ExperimentalMultiplatform"]
             }
         }
     }