diff --git a/compiler/fir/modularized-tests/tests/org/jetbrains/kotlin/fir/AbstractModularizedTest.kt b/compiler/fir/modularized-tests/tests/org/jetbrains/kotlin/fir/AbstractModularizedTest.kt
index 20f51c404c2..805071420a9 100644
--- a/compiler/fir/modularized-tests/tests/org/jetbrains/kotlin/fir/AbstractModularizedTest.kt
+++ b/compiler/fir/modularized-tests/tests/org/jetbrains/kotlin/fir/AbstractModularizedTest.kt
@@ -88,7 +88,7 @@ abstract class AbstractModularizedTest : KtUsefulTestCase() {
 
         configuration.addAll(
             CLIConfigurationKeys.CONTENT_ROOTS,
-            moduleData.sources.filter { it.extension == "kt" }.map { KotlinSourceRoot(it.absolutePath, false) })
+            moduleData.sources.filter { it.extension == "kt" || it.isDirectory }.map { KotlinSourceRoot(it.absolutePath, false) })
         return configuration
     }