diff --git a/compiler/tests-spec/tests/org/jetbrains/kotlin/spec/utils/tasks/GenerateSpecTests.kt b/compiler/tests-spec/tests/org/jetbrains/kotlin/spec/utils/tasks/GenerateSpecTests.kt
index 9caa767b1c1..ad1b4d33451 100644
--- a/compiler/tests-spec/tests/org/jetbrains/kotlin/spec/utils/tasks/GenerateSpecTests.kt
+++ b/compiler/tests-spec/tests/org/jetbrains/kotlin/spec/utils/tasks/GenerateSpecTests.kt
@@ -35,7 +35,7 @@ fun detectDirsWithTestsMapFileOnly(dirName: String, baseDir: String = "."): List
         }
     }
 
-    return excludedDirs.sorted()
+    return excludedDirs.sorted().map { it.replace("\\", "/") }
 }
 
 fun generateTests() {