diff --git a/compiler/tests-common-new/tests/org/jetbrains/kotlin/test/utils/FirIdenticalCheckerHelper.kt b/compiler/tests-common-new/tests/org/jetbrains/kotlin/test/utils/FirIdenticalCheckerHelper.kt
index 1da4b6b6be0..242b54450e7 100644
--- a/compiler/tests-common-new/tests/org/jetbrains/kotlin/test/utils/FirIdenticalCheckerHelper.kt
+++ b/compiler/tests-common-new/tests/org/jetbrains/kotlin/test/utils/FirIdenticalCheckerHelper.kt
@@ -20,7 +20,7 @@ abstract class FirIdenticalCheckerHelper(private val testServices: TestServices)
     abstract fun getFirFileToCompare(testDataFile: File): File?
 
     fun firAndClassicContentsAreEquals(testDataFile: File, trimLines: Boolean = false): Boolean {
-        val classicFile = getClassicFileToCompare(testDataFile) ?: return true
+        val classicFile = getClassicFileToCompare(testDataFile) ?: return false
         val firFile = getFirFileToCompare(testDataFile) ?: return true
         return contentsAreEquals(classicFile, firFile, trimLines)
     }