diff --git a/jps/jps-plugin/test/org/jetbrains/kotlin/jps/build/AbstractIncrementalJpsTest.kt b/jps/jps-plugin/test/org/jetbrains/kotlin/jps/build/AbstractIncrementalJpsTest.kt
index 11d72201d7c..aad6117b245 100644
--- a/jps/jps-plugin/test/org/jetbrains/kotlin/jps/build/AbstractIncrementalJpsTest.kt
+++ b/jps/jps-plugin/test/org/jetbrains/kotlin/jps/build/AbstractIncrementalJpsTest.kt
@@ -245,8 +245,8 @@ public abstract class AbstractIncrementalJpsTest(
             return modifications
         }
 
-        val haveFilesWithoutNumbers = testDataDir.listFiles { it.getName().matches(".+\\.($COMMANDS_AS_REGEX_PART)$".toRegex()) }?.isNotEmpty() ?: false
-        val haveFilesWithNumbers = testDataDir.listFiles { it.getName().matches(".+\\.($COMMANDS_AS_REGEX_PART)\\.\\d+$".toRegex()) }?.isNotEmpty() ?: false
+        val haveFilesWithoutNumbers = testDataDir.listFiles { it -> it.getName().matches(".+\\.($COMMANDS_AS_REGEX_PART)$".toRegex()) }?.isNotEmpty() ?: false
+        val haveFilesWithNumbers = testDataDir.listFiles { it -> it.getName().matches(".+\\.($COMMANDS_AS_REGEX_PART)\\.\\d+$".toRegex()) }?.isNotEmpty() ?: false
 
         if (haveFilesWithoutNumbers && haveFilesWithNumbers) {
             fail("Bad test data format: files ending with both unnumbered and numbered $COMMANDS_AS_MESSAGE_PART were found")
diff --git a/jps/jps-plugin/test/org/jetbrains/kotlin/jps/incremental/AbstractProtoComparisonTest.kt b/jps/jps-plugin/test/org/jetbrains/kotlin/jps/incremental/AbstractProtoComparisonTest.kt
index 07353e5ed9c..1b446159b37 100644
--- a/jps/jps-plugin/test/org/jetbrains/kotlin/jps/incremental/AbstractProtoComparisonTest.kt
+++ b/jps/jps-plugin/test/org/jetbrains/kotlin/jps/incremental/AbstractProtoComparisonTest.kt
@@ -65,7 +65,7 @@ public abstract class AbstractProtoComparisonTest : UsefulTestCase() {
     }
 
     private fun compileFileAndGetClasses(testPath: String, testDir: File, prefix: String): List<File> {
-        val files = File(testPath).listFiles { it.name.startsWith(prefix) }!!
+        val files = File(testPath).listFiles { it -> it.name.startsWith(prefix) }!!
         val sourcesDirectory = testDir.createSubDirectory("sources")
         val classesDirectory = testDir.createSubDirectory("$prefix.src")
 
@@ -74,7 +74,7 @@ public abstract class AbstractProtoComparisonTest : UsefulTestCase() {
         }
         MockLibraryUtil.compileKotlin(sourcesDirectory.path, classesDirectory)
 
-        return File(classesDirectory, "test").listFiles() { it.name.endsWith(".class") }?.sortedBy { it.name }!!
+        return File(classesDirectory, "test").listFiles() { it -> it.name.endsWith(".class") }?.sortedBy { it.name }!!
     }
 
     private fun Printer.printDifference(oldClassFile: File, newClassFile: File) {