diff --git a/plugins/groovy/test/org/jetbrains/plugins/groovy/CompoundTestLibrary.groovy b/plugins/groovy/test/org/jetbrains/plugins/groovy/CompoundTestLibrary.java
similarity index 100%
rename from plugins/groovy/test/org/jetbrains/plugins/groovy/CompoundTestLibrary.groovy
rename to plugins/groovy/test/org/jetbrains/plugins/groovy/CompoundTestLibrary.java
diff --git a/plugins/groovy/test/org/jetbrains/plugins/groovy/GrCommentTest.groovy b/plugins/groovy/test/org/jetbrains/plugins/groovy/GrCommentTest.java
similarity index 100%
rename from plugins/groovy/test/org/jetbrains/plugins/groovy/GrCommentTest.groovy
rename to plugins/groovy/test/org/jetbrains/plugins/groovy/GrCommentTest.java
diff --git a/plugins/groovy/test/org/jetbrains/plugins/groovy/GroovyActionsTest.groovy b/plugins/groovy/test/org/jetbrains/plugins/groovy/GroovyActionsTest.java
similarity index 100%
rename from plugins/groovy/test/org/jetbrains/plugins/groovy/GroovyActionsTest.groovy
rename to plugins/groovy/test/org/jetbrains/plugins/groovy/GroovyActionsTest.java
diff --git a/plugins/groovy/test/org/jetbrains/plugins/groovy/GroovyGotoDeclarationTest.groovy b/plugins/groovy/test/org/jetbrains/plugins/groovy/GroovyGotoDeclarationTest.java
similarity index 100%
rename from plugins/groovy/test/org/jetbrains/plugins/groovy/GroovyGotoDeclarationTest.groovy
rename to plugins/groovy/test/org/jetbrains/plugins/groovy/GroovyGotoDeclarationTest.java
diff --git a/plugins/groovy/test/org/jetbrains/plugins/groovy/GroovyWebReferenceTest.groovy b/plugins/groovy/test/org/jetbrains/plugins/groovy/GroovyWebReferenceTest.java
similarity index 100%
rename from plugins/groovy/test/org/jetbrains/plugins/groovy/GroovyWebReferenceTest.groovy
rename to plugins/groovy/test/org/jetbrains/plugins/groovy/GroovyWebReferenceTest.java
diff --git a/plugins/groovy/test/org/jetbrains/plugins/groovy/LibraryLightProjectDescriptor.groovy b/plugins/groovy/test/org/jetbrains/plugins/groovy/LibraryLightProjectDescriptor.java
similarity index 100%
rename from plugins/groovy/test/org/jetbrains/plugins/groovy/LibraryLightProjectDescriptor.groovy
rename to plugins/groovy/test/org/jetbrains/plugins/groovy/LibraryLightProjectDescriptor.java
diff --git a/plugins/groovy/test/org/jetbrains/plugins/groovy/LightGroovyTestCase.groovy b/plugins/groovy/test/org/jetbrains/plugins/groovy/LightGroovyTestCase.java
similarity index 100%
rename from plugins/groovy/test/org/jetbrains/plugins/groovy/LightGroovyTestCase.groovy
rename to plugins/groovy/test/org/jetbrains/plugins/groovy/LightGroovyTestCase.java
diff --git a/plugins/groovy/test/org/jetbrains/plugins/groovy/ReachingDefsTest.groovy b/plugins/groovy/test/org/jetbrains/plugins/groovy/ReachingDefsTest.java
similarity index 100%
rename from plugins/groovy/test/org/jetbrains/plugins/groovy/ReachingDefsTest.groovy
rename to plugins/groovy/test/org/jetbrains/plugins/groovy/ReachingDefsTest.java
diff --git a/plugins/groovy/test/org/jetbrains/plugins/groovy/RepositoryTestLibrary.groovy b/plugins/groovy/test/org/jetbrains/plugins/groovy/RepositoryTestLibrary.java
similarity index 100%
rename from plugins/groovy/test/org/jetbrains/plugins/groovy/RepositoryTestLibrary.groovy
rename to plugins/groovy/test/org/jetbrains/plugins/groovy/RepositoryTestLibrary.java
diff --git a/plugins/groovy/test/org/jetbrains/plugins/groovy/SetupRule.groovy b/plugins/groovy/test/org/jetbrains/plugins/groovy/SetupRule.java
similarity index 100%
rename from plugins/groovy/test/org/jetbrains/plugins/groovy/SetupRule.groovy
rename to plugins/groovy/test/org/jetbrains/plugins/groovy/SetupRule.java
diff --git a/plugins/groovy/test/org/jetbrains/plugins/groovy/lang/GroovyUnwrapTest.groovy b/plugins/groovy/test/org/jetbrains/plugins/groovy/lang/GroovyUnwrapTest.java
similarity index 100%
rename from plugins/groovy/test/org/jetbrains/plugins/groovy/lang/GroovyUnwrapTest.groovy
rename to plugins/groovy/test/org/jetbrains/plugins/groovy/lang/GroovyUnwrapTest.java
diff --git a/plugins/groovy/test/org/jetbrains/plugins/groovy/lang/highlighting/GrUncheckedAssignmentOfRawTypeTest.groovy b/plugins/groovy/test/org/jetbrains/plugins/groovy/lang/highlighting/GrUncheckedAssignmentOfRawTypeTest.java
similarity index 100%
rename from plugins/groovy/test/org/jetbrains/plugins/groovy/lang/highlighting/GrUncheckedAssignmentOfRawTypeTest.groovy
rename to plugins/groovy/test/org/jetbrains/plugins/groovy/lang/highlighting/GrUncheckedAssignmentOfRawTypeTest.java
diff --git a/plugins/groovy/test/org/jetbrains/plugins/groovy/util/Groovy25Test.groovy b/plugins/groovy/test/org/jetbrains/plugins/groovy/util/Groovy25Test.java
similarity index 100%
rename from plugins/groovy/test/org/jetbrains/plugins/groovy/util/Groovy25Test.groovy
rename to plugins/groovy/test/org/jetbrains/plugins/groovy/util/Groovy25Test.java
diff --git a/plugins/groovy/test/org/jetbrains/plugins/groovy/util/Groovy30Test.groovy b/plugins/groovy/test/org/jetbrains/plugins/groovy/util/Groovy30Test.java
similarity index 100%
rename from plugins/groovy/test/org/jetbrains/plugins/groovy/util/Groovy30Test.groovy
rename to plugins/groovy/test/org/jetbrains/plugins/groovy/util/Groovy30Test.java
diff --git a/plugins/groovy/test/org/jetbrains/plugins/groovy/util/GroovyLatestTest.groovy b/plugins/groovy/test/org/jetbrains/plugins/groovy/util/GroovyLatestTest.java
similarity index 100%
rename from plugins/groovy/test/org/jetbrains/plugins/groovy/util/GroovyLatestTest.groovy
rename to plugins/groovy/test/org/jetbrains/plugins/groovy/util/GroovyLatestTest.java
diff --git a/plugins/groovy/test/org/jetbrains/plugins/groovy/util/LightProjectTest.groovy b/plugins/groovy/test/org/jetbrains/plugins/groovy/util/LightProjectTest.java
similarity index 100%
rename from plugins/groovy/test/org/jetbrains/plugins/groovy/util/LightProjectTest.groovy
rename to plugins/groovy/test/org/jetbrains/plugins/groovy/util/LightProjectTest.java