diff --git a/compiler/testData/codegen/box/inlineArgsInPlace/kt49370.kt b/compiler/testData/codegen/box/inlineArgsInPlace/kt49370.kt
index f541ccee802..68654e0167b 100644
--- a/compiler/testData/codegen/box/inlineArgsInPlace/kt49370.kt
+++ b/compiler/testData/codegen/box/inlineArgsInPlace/kt49370.kt
@@ -1,4 +1,3 @@
-// !OPT_IN: kotlin.ExperimentalStdlibApi
 // WITH_STDLIB
 
 fun box(): String {
diff --git a/compiler/testData/codegen/box/reflection/annotations/findAnnotation.kt b/compiler/testData/codegen/box/reflection/annotations/findAnnotation.kt
index 92d9b8b68af..03a8543082f 100644
--- a/compiler/testData/codegen/box/reflection/annotations/findAnnotation.kt
+++ b/compiler/testData/codegen/box/reflection/annotations/findAnnotation.kt
@@ -1,7 +1,6 @@
 // IGNORE_BACKEND: JS_IR
 // IGNORE_BACKEND: JS_IR_ES6
 // IGNORE_BACKEND: JS, NATIVE, WASM
-// !OPT_IN: kotlin.ExperimentalStdlibApi
 // WITH_REFLECT
 
 import kotlin.reflect.full.findAnnotation
diff --git a/compiler/testData/codegen/box/reflection/annotations/hasAnnotation.kt b/compiler/testData/codegen/box/reflection/annotations/hasAnnotation.kt
index 834111d7882..c46cf570849 100644
--- a/compiler/testData/codegen/box/reflection/annotations/hasAnnotation.kt
+++ b/compiler/testData/codegen/box/reflection/annotations/hasAnnotation.kt
@@ -1,4 +1,3 @@
-// !OPT_IN: kotlin.ExperimentalStdlibApi
 // TARGET_BACKEND: JVM
 // WITH_REFLECT
 
diff --git a/compiler/testData/codegen/box/reflection/annotations/repeatable/javaAnnotation.kt b/compiler/testData/codegen/box/reflection/annotations/repeatable/javaAnnotation.kt
index df8a5963f23..579ac0b9e29 100644
--- a/compiler/testData/codegen/box/reflection/annotations/repeatable/javaAnnotation.kt
+++ b/compiler/testData/codegen/box/reflection/annotations/repeatable/javaAnnotation.kt
@@ -1,5 +1,4 @@
 // !LANGUAGE: +RepeatableAnnotations
-// !OPT_IN: kotlin.ExperimentalStdlibApi
 // TARGET_BACKEND: JVM_IR
 // JVM_TARGET: 1.8
 // FULL_JDK
diff --git a/compiler/testData/codegen/box/reflection/annotations/repeatable/jvmRepeatableKotlinAnnotation.kt b/compiler/testData/codegen/box/reflection/annotations/repeatable/jvmRepeatableKotlinAnnotation.kt
index e6ff54c34f5..b544b4478b8 100644
--- a/compiler/testData/codegen/box/reflection/annotations/repeatable/jvmRepeatableKotlinAnnotation.kt
+++ b/compiler/testData/codegen/box/reflection/annotations/repeatable/jvmRepeatableKotlinAnnotation.kt
@@ -1,5 +1,4 @@
 // !LANGUAGE: +RepeatableAnnotations
-// !OPT_IN: kotlin.ExperimentalStdlibApi
 // TARGET_BACKEND: JVM_IR
 // JVM_TARGET: 1.8
 // FULL_JDK
diff --git a/compiler/testData/codegen/box/reflection/annotations/repeatable/kotlinAnnotation.kt b/compiler/testData/codegen/box/reflection/annotations/repeatable/kotlinAnnotation.kt
index c35f52e36ff..b68e8ca4989 100644
--- a/compiler/testData/codegen/box/reflection/annotations/repeatable/kotlinAnnotation.kt
+++ b/compiler/testData/codegen/box/reflection/annotations/repeatable/kotlinAnnotation.kt
@@ -1,5 +1,4 @@
 // !LANGUAGE: +RepeatableAnnotations
-// !OPT_IN: kotlin.ExperimentalStdlibApi
 // TARGET_BACKEND: JVM_IR
 // JVM_TARGET: 1.8
 // FULL_JDK
diff --git a/compiler/testData/codegen/box/reflection/annotations/repeatable/kt49335.kt b/compiler/testData/codegen/box/reflection/annotations/repeatable/kt49335.kt
index 96445dd1f2e..f6c0e875b36 100644
--- a/compiler/testData/codegen/box/reflection/annotations/repeatable/kt49335.kt
+++ b/compiler/testData/codegen/box/reflection/annotations/repeatable/kt49335.kt
@@ -1,5 +1,4 @@
 // !LANGUAGE: +RepeatableAnnotations
-// !OPT_IN: kotlin.ExperimentalStdlibApi
 // TARGET_BACKEND: JVM_IR
 // JVM_TARGET: 1.8
 // FULL_JDK
diff --git a/compiler/testData/codegen/box/reflection/annotations/repeatable/nonRepeatedAnnotationWithItsContainer.kt b/compiler/testData/codegen/box/reflection/annotations/repeatable/nonRepeatedAnnotationWithItsContainer.kt
index 928b7998f97..1e39de487a4 100644
--- a/compiler/testData/codegen/box/reflection/annotations/repeatable/nonRepeatedAnnotationWithItsContainer.kt
+++ b/compiler/testData/codegen/box/reflection/annotations/repeatable/nonRepeatedAnnotationWithItsContainer.kt
@@ -1,5 +1,4 @@
 // !LANGUAGE: +RepeatableAnnotations
-// !OPT_IN: kotlin.ExperimentalStdlibApi
 // TARGET_BACKEND: JVM_IR
 // JVM_TARGET: 1.8
 // FULL_JDK
diff --git a/compiler/testData/codegen/box/reflection/isInstance/isInstanceCastAndSafeCast.kt b/compiler/testData/codegen/box/reflection/isInstance/isInstanceCastAndSafeCast.kt
index a1e46a3c181..0306c65ad63 100644
--- a/compiler/testData/codegen/box/reflection/isInstance/isInstanceCastAndSafeCast.kt
+++ b/compiler/testData/codegen/box/reflection/isInstance/isInstanceCastAndSafeCast.kt
@@ -1,4 +1,3 @@
-// !OPT_IN: kotlin.ExperimentalStdlibApi
 // TARGET_BACKEND: JVM
 // WITH_STDLIB
 
diff --git a/compiler/testData/codegen/box/reflection/typeOf/js/classes.kt b/compiler/testData/codegen/box/reflection/typeOf/js/classes.kt
index 387bec887a8..8a04ba241fe 100644
--- a/compiler/testData/codegen/box/reflection/typeOf/js/classes.kt
+++ b/compiler/testData/codegen/box/reflection/typeOf/js/classes.kt
@@ -1,4 +1,3 @@
-// !OPT_IN: kotlin.ExperimentalStdlibApi
 // TARGET_BACKEND: JS
 // WITH_REFLECT
 // KJS_WITH_FULL_RUNTIME
diff --git a/compiler/testData/codegen/box/reflection/typeOf/js/inlineClasses.kt b/compiler/testData/codegen/box/reflection/typeOf/js/inlineClasses.kt
index bde178b0402..60fa861ed4f 100644
--- a/compiler/testData/codegen/box/reflection/typeOf/js/inlineClasses.kt
+++ b/compiler/testData/codegen/box/reflection/typeOf/js/inlineClasses.kt
@@ -1,4 +1,3 @@
-// !OPT_IN: kotlin.ExperimentalStdlibApi
 // TARGET_BACKEND: JS
 // WITH_REFLECT
 // KJS_WITH_FULL_RUNTIME
diff --git a/compiler/testData/codegen/box/reflection/typeOf/js/kType.kt b/compiler/testData/codegen/box/reflection/typeOf/js/kType.kt
index a0f899e7f54..312f3bc0495 100644
--- a/compiler/testData/codegen/box/reflection/typeOf/js/kType.kt
+++ b/compiler/testData/codegen/box/reflection/typeOf/js/kType.kt
@@ -1,4 +1,3 @@
-// !OPT_IN: kotlin.ExperimentalStdlibApi
 // TARGET_BACKEND: JS
 // WITH_REFLECT
 // KJS_WITH_FULL_RUNTIME
diff --git a/compiler/testData/codegen/box/reflection/typeOf/js/manyTypeArguments.kt b/compiler/testData/codegen/box/reflection/typeOf/js/manyTypeArguments.kt
index d1e0666800c..998eb59399e 100644
--- a/compiler/testData/codegen/box/reflection/typeOf/js/manyTypeArguments.kt
+++ b/compiler/testData/codegen/box/reflection/typeOf/js/manyTypeArguments.kt
@@ -1,4 +1,3 @@
-// !OPT_IN: kotlin.ExperimentalStdlibApi
 // TARGET_BACKEND: JS
 // WITH_REFLECT
 // KJS_WITH_FULL_RUNTIME
diff --git a/compiler/testData/codegen/box/reflection/typeOf/js/multipleLayers.kt b/compiler/testData/codegen/box/reflection/typeOf/js/multipleLayers.kt
index ee9aa52d0f2..dc2e6ed8b6f 100644
--- a/compiler/testData/codegen/box/reflection/typeOf/js/multipleLayers.kt
+++ b/compiler/testData/codegen/box/reflection/typeOf/js/multipleLayers.kt
@@ -1,4 +1,3 @@
-// !OPT_IN: kotlin.ExperimentalStdlibApi
 // TARGET_BACKEND: JS
 // WITH_REFLECT
 // KJS_WITH_FULL_RUNTIME
diff --git a/compiler/testData/codegen/box/reflection/typeOf/js/multipleModules.kt b/compiler/testData/codegen/box/reflection/typeOf/js/multipleModules.kt
index 58bfa79c08f..68965d65636 100644
--- a/compiler/testData/codegen/box/reflection/typeOf/js/multipleModules.kt
+++ b/compiler/testData/codegen/box/reflection/typeOf/js/multipleModules.kt
@@ -1,4 +1,3 @@
-// !OPT_IN: kotlin.ExperimentalStdlibApi
 // TARGET_BACKEND: JS
 // WITH_REFLECT
 // KJS_WITH_FULL_RUNTIME
diff --git a/compiler/testData/ir/irText/firProblems/typeVariableAfterBuildMap.kt b/compiler/testData/ir/irText/firProblems/typeVariableAfterBuildMap.kt
index 9ffda26ebfd..49f9c153fc4 100644
--- a/compiler/testData/ir/irText/firProblems/typeVariableAfterBuildMap.kt
+++ b/compiler/testData/ir/irText/firProblems/typeVariableAfterBuildMap.kt
@@ -1,4 +1,3 @@
-// !OPT_IN: kotlin.ExperimentalStdlibApi
 // WITH_STDLIB
 
 abstract class Visibility(val name: String, val isPublicAPI: Boolean) {