diff --git a/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/kotlin/org/jetbrains/kotlin/gradle/NewMultiplatformIT.kt b/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/kotlin/org/jetbrains/kotlin/gradle/NewMultiplatformIT.kt
index b1bc9b82db0..f14d4e186c4 100644
--- a/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/kotlin/org/jetbrains/kotlin/gradle/NewMultiplatformIT.kt
+++ b/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/kotlin/org/jetbrains/kotlin/gradle/NewMultiplatformIT.kt
@@ -730,8 +730,8 @@ class NewMultiplatformIT : BaseGradleIT() {
                         // languageVersion = '1.3' // can't do this with Kotlin/Native 1.4+, done below for non-Native tasks
                         // apiVersion = '1.3' // can't do this with Kotlin/Native 1.4+, done below for non-Native tasks
                         enableLanguageFeature('InlineClasses')
-                        useExperimentalAnnotation('kotlin.ExperimentalUnsignedTypes')
-                        useExperimentalAnnotation('kotlin.contracts.ExperimentalContracts')
+                        optInAnnotation('kotlin.ExperimentalUnsignedTypes')
+                        optInAnnotation('kotlin.contracts.ExperimentalContracts')
                         progressiveMode = true
                     }
                     project.ext.set("kotlin.mpp.freeCompilerArgsForSourceSet.${'$'}name", ["-Xno-inline"])
@@ -824,8 +824,8 @@ class NewMultiplatformIT : BaseGradleIT() {
         )
 
         testMonotonousCheck(
-            "languageSettings.useExperimentalAnnotation('kotlin.ExperimentalUnsignedTypes')",
-            "The dependent source set must use all experimental annotations that its dependency uses."
+            "languageSettings.optInAnnotation('kotlin.ExperimentalUnsignedTypes')",
+            "The dependent source set must use all opt-in annotations that its dependency uses."
         )
 
         // check that enabling a bugfix feature and progressive mode or advancing API level
diff --git a/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/commonizeCurlInterop/build.gradle.kts b/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/commonizeCurlInterop/build.gradle.kts
index e6cf9c1c3d7..5fea77785fe 100644
--- a/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/commonizeCurlInterop/build.gradle.kts
+++ b/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/commonizeCurlInterop/build.gradle.kts
@@ -21,7 +21,7 @@ kotlin {
     targetBMain.dependsOn(nativeMain)
 
     sourceSets.all {
-        languageSettings.useExperimentalAnnotation("kotlin.RequiresOptIn")
+        languageSettings.optInAnnotation("kotlin.RequiresOptIn")
     }
 
     targetA.compilations.getByName("main").cinterops.create("curl")
diff --git a/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/commonizeHierarchically/p1/build.gradle.kts b/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/commonizeHierarchically/p1/build.gradle.kts
index a0bfc34e7e0..cab4a00aa1e 100644
--- a/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/commonizeHierarchically/p1/build.gradle.kts
+++ b/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/commonizeHierarchically/p1/build.gradle.kts
@@ -75,7 +75,7 @@ kotlin {
 
 
     sourceSets.all {
-        languageSettings.useExperimentalAnnotation("kotlin.RequiresOptIn")
+        languageSettings.optInAnnotation("kotlin.RequiresOptIn")
     }
 
     targets.withType<KotlinNativeTarget>().forEach { target ->
diff --git a/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/commonizeHierarchicallyMultiModule/p1/build.gradle.kts b/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/commonizeHierarchicallyMultiModule/p1/build.gradle.kts
index 6252242da0c..3485ae5faed 100644
--- a/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/commonizeHierarchicallyMultiModule/p1/build.gradle.kts
+++ b/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/commonizeHierarchicallyMultiModule/p1/build.gradle.kts
@@ -68,7 +68,7 @@ kotlin {
 
 
     sourceSets.all {
-        languageSettings.useExperimentalAnnotation("kotlin.RequiresOptIn")
+        languageSettings.optInAnnotation("kotlin.RequiresOptIn")
     }
 
     targets.withType<KotlinNativeTarget>().forEach { target ->
diff --git a/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/commonizeHierarchicallyMultiModule/p2/build.gradle.kts b/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/commonizeHierarchicallyMultiModule/p2/build.gradle.kts
index daa84d98dfa..92a6df91a3d 100644
--- a/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/commonizeHierarchicallyMultiModule/p2/build.gradle.kts
+++ b/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/commonizeHierarchicallyMultiModule/p2/build.gradle.kts
@@ -71,7 +71,7 @@ kotlin {
     }
 
     sourceSets.all {
-        languageSettings.useExperimentalAnnotation("kotlin.RequiresOptIn")
+        languageSettings.optInAnnotation("kotlin.RequiresOptIn")
     }
 
     targets.withType<KotlinNativeTarget>().forEach { target ->
diff --git a/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/commonizeHierarchicallyMultiModule/p3/build.gradle.kts b/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/commonizeHierarchicallyMultiModule/p3/build.gradle.kts
index 3553dae2270..3966756c887 100644
--- a/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/commonizeHierarchicallyMultiModule/p3/build.gradle.kts
+++ b/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/commonizeHierarchicallyMultiModule/p3/build.gradle.kts
@@ -67,7 +67,7 @@ kotlin {
     }
 
     sourceSets.all {
-        languageSettings.useExperimentalAnnotation("kotlin.RequiresOptIn")
+        languageSettings.optInAnnotation("kotlin.RequiresOptIn")
     }
 
     targets.withType<KotlinNativeTarget>().forEach { target ->
diff --git a/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/commonizeInteropUsingPosixApis/build.gradle.kts b/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/commonizeInteropUsingPosixApis/build.gradle.kts
index 953688b74bd..55c9813f9aa 100644
--- a/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/commonizeInteropUsingPosixApis/build.gradle.kts
+++ b/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/commonizeInteropUsingPosixApis/build.gradle.kts
@@ -22,7 +22,7 @@ kotlin {
     targetBMain.dependsOn(nativeMain)
 
     sourceSets.all {
-        languageSettings.useExperimentalAnnotation("kotlin.RequiresOptIn")
+        languageSettings.optInAnnotation("kotlin.RequiresOptIn")
     }
 
     targetA.compilations.getByName("main").cinterops.create("withPosix") {
diff --git a/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/commonizeSQLiteAndCurlInterop/build.gradle.kts b/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/commonizeSQLiteAndCurlInterop/build.gradle.kts
index bab129da953..789b6296f72 100644
--- a/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/commonizeSQLiteAndCurlInterop/build.gradle.kts
+++ b/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/commonizeSQLiteAndCurlInterop/build.gradle.kts
@@ -21,7 +21,7 @@ kotlin {
     targetBMain.dependsOn(nativeMain)
 
     sourceSets.all {
-        languageSettings.useExperimentalAnnotation("kotlin.RequiresOptIn")
+        languageSettings.optInAnnotation("kotlin.RequiresOptIn")
     }
 
     targetA.compilations.getByName("main").cinterops.create("sqlite")
diff --git a/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/commonizeSQLiteInterop/build.gradle.kts b/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/commonizeSQLiteInterop/build.gradle.kts
index cabe4ca8fa3..dfab479e29c 100644
--- a/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/commonizeSQLiteInterop/build.gradle.kts
+++ b/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/commonizeSQLiteInterop/build.gradle.kts
@@ -21,7 +21,7 @@ kotlin {
     targetBMain.dependsOn(nativeMain)
 
     sourceSets.all {
-        languageSettings.useExperimentalAnnotation("kotlin.RequiresOptIn")
+        languageSettings.optInAnnotation("kotlin.RequiresOptIn")
     }
 
     targetA.compilations.getByName("main").cinterops.create("sqlite")