diff --git a/compiler/tests-common/org/jetbrains/kotlin/test/MockLibraryUtil.java b/compiler/tests-common/org/jetbrains/kotlin/test/MockLibraryUtil.kt
similarity index 100%
rename from compiler/tests-common/org/jetbrains/kotlin/test/MockLibraryUtil.java
rename to compiler/tests-common/org/jetbrains/kotlin/test/MockLibraryUtil.kt