diff --git a/idea/tests/org/jetbrains/kotlin/idea/parameterInfo/AbstractParameterInfoTest.kt b/idea/tests/org/jetbrains/kotlin/idea/parameterInfo/AbstractParameterInfoTest.kt
index 19692c6fed2..bc602317a36 100644
--- a/idea/tests/org/jetbrains/kotlin/idea/parameterInfo/AbstractParameterInfoTest.kt
+++ b/idea/tests/org/jetbrains/kotlin/idea/parameterInfo/AbstractParameterInfoTest.kt
@@ -46,7 +46,11 @@ abstract class AbstractParameterInfoTest : LightCodeInsightFixtureTestCase() {
         val prefix = FileUtil.getNameWithoutExtension(PathUtil.getFileName(fileName))
         val mainFile = File(FileUtil.toSystemDependentName(fileName))
         mainFile.parentFile
-            .listFiles { _, name -> name.startsWith("$prefix.") && name != mainFile.name }
+            .listFiles { _, name ->
+                name.startsWith("$prefix.") &&
+                        name != mainFile.name &&
+                        name.substringAfterLast(".") in setOf("java", "kt")
+            }!!
             .forEach { myFixture.configureByFile(it.absolutePath.substringAfter(myFixture.testDataPath)) }
 
         myFixture.configureByFile(File(fileName).absolutePath.substringAfter(myFixture.testDataPath))