diff --git a/compiler/testData/diagnostics/helpers/coroutines/CoroutineHelpers.kt b/compiler/testData/diagnostics/helpers/coroutines/CoroutineHelpers.kt
index fbba93231cd..6d72aea84dd 100644
--- a/compiler/testData/diagnostics/helpers/coroutines/CoroutineHelpers.kt
+++ b/compiler/testData/diagnostics/helpers/coroutines/CoroutineHelpers.kt
@@ -1,3 +1,6 @@
+@file:JvmMultifileClass
+@file:JvmName("CoroutineUtilKt")
+
 package helpers
 
 import kotlin.coroutines.*
diff --git a/compiler/testData/diagnostics/helpers/coroutines/StateMachineChecker.kt b/compiler/testData/diagnostics/helpers/coroutines/StateMachineChecker.kt
index 69a47f6aac6..bd4ab066365 100644
--- a/compiler/testData/diagnostics/helpers/coroutines/StateMachineChecker.kt
+++ b/compiler/testData/diagnostics/helpers/coroutines/StateMachineChecker.kt
@@ -1,3 +1,6 @@
+@file:JvmMultifileClass
+@file:JvmName("CoroutineUtilKt")
+
 package helpers
 
 import kotlin.coroutines.*
diff --git a/compiler/testData/diagnostics/helpers/coroutines/TailCallOptimizationChecker.kt b/compiler/testData/diagnostics/helpers/coroutines/TailCallOptimizationChecker.kt
index ad89c2c337c..e81cd4e907f 100644
--- a/compiler/testData/diagnostics/helpers/coroutines/TailCallOptimizationChecker.kt
+++ b/compiler/testData/diagnostics/helpers/coroutines/TailCallOptimizationChecker.kt
@@ -1,3 +1,6 @@
+@file:JvmMultifileClass
+@file:JvmName("CoroutineUtilKt")
+
 package helpers
 
 import kotlin.coroutines.*