diff --git a/kotlin-native/backend.native/tests/compilerChecks/README.md b/kotlin-native/backend.native/tests/compilerChecks/README.md
index 18579637f79..ed0e58769b0 100644
--- a/kotlin-native/backend.native/tests/compilerChecks/README.md
+++ b/kotlin-native/backend.native/tests/compilerChecks/README.md
@@ -74,9 +74,9 @@ kotlin-native/backend.native/tests/compilerChecks/t35.kt:5:13: error: unable to
 kotlin-native/backend.native/tests/compilerChecks/t36.kt
 kotlin-native/backend.native/tests/compilerChecks/t36.kt:4:13: error: native interop types constructors must not be called directly
 kotlin-native/backend.native/tests/compilerChecks/t37.kt
-kotlin-native/backend.native/tests/compilerChecks/t37.kt:5:5: error: subclasses of NativePointed cannot have properties with backing fields
+kotlin-native/backend.native/tests/compilerChecks/t37.kt:5:5: error: subclasses of kotlinx.cinterop.NativePointed cannot have properties with backing fields
 kotlin-native/backend.native/tests/compilerChecks/t38.kt
-kotlin-native/backend.native/tests/compilerChecks/t38.kt:5:5: error: subclasses of NativePointed cannot have properties with backing fields
+kotlin-native/backend.native/tests/compilerChecks/t38.kt:5:5: error: subclasses of kotlinx.cinterop.NativePointed cannot have properties with backing fields
 kotlin-native/backend.native/tests/compilerChecks/t4.kt
 kotlin-native/backend.native/tests/compilerChecks/t4.kt:4:21: error: callable references to variadic Objective-C methods are not supported
 kotlin-native/backend.native/tests/compilerChecks/t40.kt
@@ -106,20 +106,15 @@ kotlin-native/backend.native/tests/compilerChecks/t49.kt:5:12: error: kotlin.nat
 kotlin-native/backend.native/tests/compilerChecks/t5.kt
 kotlin-native/backend.native/tests/compilerChecks/t5.kt:4:83: error: passing String as variadic Objective-C argument is ambiguous; cast it to NSString or pass with '.cstr' as C string
 kotlin-native/backend.native/tests/compilerChecks/t50.kt
-kotlin-native/backend.native/tests/compilerChecks/t50.kt:10:16: error: kotlin.native.concurrent.Worker.execute must take an unbound, non-capturing function or lambda, but captures at:
-    kotlin-native/backend.native/tests/compilerChecks/t50.kt:10:54
+kotlin-native/backend.native/tests/compilerChecks/t50.kt:11:16: error: kotlin.native.concurrent.Worker.execute must take an unbound, non-capturing function or lambda, but captures at:
+    kotlin-native/backend.native/tests/compilerChecks/t50.kt:11:54
 kotlin-native/backend.native/tests/compilerChecks/t51.kt
   MISSING EXPECTED ERROR FOR kotlin-native/backend.native/tests/compilerChecks/t51.kt
 kotlin-native/backend.native/tests/compilerChecks/t52.kt
-kotlin-native/backend.native/tests/compilerChecks/t52.kt:5:5: warning: 'createCleaner(T, (T) -> Unit): Cleaner' is deprecated. Use kotlin.native.ref.createCleaner instead.
-    createCleaner(42) { println(x) }
-    ^
-  MISSING EXPECTED ERROR FOR kotlin-native/backend.native/tests/compilerChecks/t52.kt
+kotlin-native/backend.native/tests/compilerChecks/t52.kt:5:5: error: kotlin.native.ref.createCleaner must take an unbound, non-capturing function or lambda, but captures at:
+     kotlin-native/backend.native/tests/compilerChecks/t52.kt:5:33: x
 kotlin-native/backend.native/tests/compilerChecks/t53.kt
-kotlin-native/backend.native/tests/compilerChecks/t53.kt:9:5: warning: 'createCleaner(T, (T) -> Unit): Cleaner' is deprecated. Use kotlin.native.ref.createCleaner instead.
-    createCleaner(42, C(x)::bar)
-    ^
-  MISSING EXPECTED ERROR FOR kotlin-native/backend.native/tests/compilerChecks/t53.kt
+kotlin-native/backend.native/tests/compilerChecks/t53.kt:9:5: error: kotlin.native.ref.createCleaner must take an unbound, non-capturing function or lambda, but captures at:
 kotlin-native/backend.native/tests/compilerChecks/t54.kt
 kotlin-native/backend.native/tests/compilerChecks/t54.kt:1:44: error: no spread elements allowed here
 kotlin-native/backend.native/tests/compilerChecks/t55.kt
@@ -135,7 +130,7 @@ kotlin-native/backend.native/tests/compilerChecks/t59.kt:5:5: error: non-reified
 kotlin-native/backend.native/tests/compilerChecks/t6.kt
 kotlin-native/backend.native/tests/compilerChecks/t6.kt:4:97: error: when calling variadic Objective-C methods spread operator is supported only for *arrayOf(...)
 kotlin-native/backend.native/tests/compilerChecks/t60.kt
-kotlin-native/backend.native/tests/compilerChecks/t60.kt:4:5: error: subclasses of NativePointed cannot have properties with backing fields
+kotlin-native/backend.native/tests/compilerChecks/t60.kt:4:5: error: subclasses of kotlinx.cinterop.NativePointed cannot have properties with backing fields
 kotlin-native/backend.native/tests/compilerChecks/t61.kt
 kotlin-native/backend.native/tests/compilerChecks/t61.kt:8:5: error: only companion objects of subclasses of Objective-C classes can inherit from Objective-C metaclasses
 kotlin-native/backend.native/tests/compilerChecks/t62.kt
diff --git a/kotlin-native/backend.native/tests/compilerChecks/runtests.sh b/kotlin-native/backend.native/tests/compilerChecks/runtests.sh
index 48bc38ec501..47b5d84f8c5 100755
--- a/kotlin-native/backend.native/tests/compilerChecks/runtests.sh
+++ b/kotlin-native/backend.native/tests/compilerChecks/runtests.sh
@@ -5,7 +5,7 @@
 
 for TEST in kotlin-native/backend.native/tests/compilerChecks/*.kt; do
   echo "$TEST";
-  konanc -p library -Xsuppress-version-warnings "$TEST" "$@";
+  konanc -p library -opt-in=kotlinx.cinterop.ExperimentalForeignApi -opt-in=kotlinx.cinterop.BetaInteropApi -opt-in=kotlin.native.internal.InternalForKotlinNative -Xsuppress-version-warnings "$TEST" "$@";
   retVal=$?
   if [ $retVal -eq 0 ]; then
     echo "  MISSING EXPECTED ERROR FOR $TEST"
diff --git a/kotlin-native/backend.native/tests/compilerChecks/t50.kt b/kotlin-native/backend.native/tests/compilerChecks/t50.kt
index 41d5868c00a..c02e6326c4e 100644
--- a/kotlin-native/backend.native/tests/compilerChecks/t50.kt
+++ b/kotlin-native/backend.native/tests/compilerChecks/t50.kt
@@ -1,3 +1,4 @@
+@file:OptIn(ObsoleteWorkersApi::class)
 import kotlin.native.concurrent.*
 
 class Z(val x: Int) {
diff --git a/kotlin-native/backend.native/tests/compilerChecks/t51.kt b/kotlin-native/backend.native/tests/compilerChecks/t51.kt
index 5d3baa4a347..5de666d7a36 100644
--- a/kotlin-native/backend.native/tests/compilerChecks/t51.kt
+++ b/kotlin-native/backend.native/tests/compilerChecks/t51.kt
@@ -1,3 +1,4 @@
+@file:OptIn(ObsoleteWorkersApi::class)
 import kotlin.native.concurrent.*
 
 class Z(val x: Int) {
diff --git a/kotlin-native/backend.native/tests/compilerChecks/t52.kt b/kotlin-native/backend.native/tests/compilerChecks/t52.kt
index 1372cc106c5..2697203eef3 100644
--- a/kotlin-native/backend.native/tests/compilerChecks/t52.kt
+++ b/kotlin-native/backend.native/tests/compilerChecks/t52.kt
@@ -1,4 +1,4 @@
-import kotlin.native.internal.*
+import kotlin.native.ref.*
 
 @OptIn(kotlin.ExperimentalStdlibApi::class)
 fun foo(x: Int) {
diff --git a/kotlin-native/backend.native/tests/compilerChecks/t53.kt b/kotlin-native/backend.native/tests/compilerChecks/t53.kt
index 117948147b3..4228e39a588 100644
--- a/kotlin-native/backend.native/tests/compilerChecks/t53.kt
+++ b/kotlin-native/backend.native/tests/compilerChecks/t53.kt
@@ -1,4 +1,4 @@
-import kotlin.native.internal.*
+import kotlin.native.ref.*
 
 class C(val x: Int) {
     fun bar(y: Int) = println(x + y)