diff --git a/idea/tests/org/jetbrains/kotlin/idea/stubs/AbstractStubBuilderTest.java b/idea/tests/org/jetbrains/kotlin/idea/stubs/AbstractStubBuilderTest.kt
similarity index 100%
rename from idea/tests/org/jetbrains/kotlin/idea/stubs/AbstractStubBuilderTest.java
rename to idea/tests/org/jetbrains/kotlin/idea/stubs/AbstractStubBuilderTest.kt