diff --git a/kotlin-native/backend.native/tests/interop/threadStates/unhandledException.kt b/kotlin-native/backend.native/tests/interop/threadStates/unhandledException.kt
index 95d3075b54a..e47bcc8006e 100644
--- a/kotlin-native/backend.native/tests/interop/threadStates/unhandledException.kt
+++ b/kotlin-native/backend.native/tests/interop/threadStates/unhandledException.kt
@@ -2,7 +2,7 @@
  * Copyright 2010-2021 JetBrains s.r.o. and Kotlin Programming Language contributors.
  * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
  */
-@file:OptIn(FreezingIsDeprecated::class)
+@file:OptIn(FreezingIsDeprecated::class, ExperimentalStdlibApi::class)
 
 import kotlin.native.concurrent.*
 import kotlin.native.internal.Debugging
diff --git a/kotlin-native/backend.native/tests/interop/threadStates/unhandledExceptionInForeignThread.kt b/kotlin-native/backend.native/tests/interop/threadStates/unhandledExceptionInForeignThread.kt
index aa670ed272a..09c62025064 100644
--- a/kotlin-native/backend.native/tests/interop/threadStates/unhandledExceptionInForeignThread.kt
+++ b/kotlin-native/backend.native/tests/interop/threadStates/unhandledExceptionInForeignThread.kt
@@ -2,7 +2,7 @@
  * Copyright 2010-2021 JetBrains s.r.o. and Kotlin Programming Language contributors.
  * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
  */
-@file:OptIn(FreezingIsDeprecated::class)
+@file:OptIn(FreezingIsDeprecated::class, ExperimentalStdlibApi::class)
 
 import kotlin.native.concurrent.*
 import kotlin.native.internal.Debugging