diff --git a/lib/kunit/debugfs.c b/lib/kunit/debugfs.c
index d548750a325ace..b25d214b93e161 100644
--- a/lib/kunit/debugfs.c
+++ b/lib/kunit/debugfs.c
@@ -212,8 +212,11 @@ void kunit_debugfs_create_suite(struct kunit_suite *suite)
 
 err:
 	string_stream_destroy(suite->log);
-	kunit_suite_for_each_test_case(suite, test_case)
+	suite->log = NULL;
+	kunit_suite_for_each_test_case(suite, test_case) {
 		string_stream_destroy(test_case->log);
+		test_case->log = NULL;
+	}
 }
 
 void kunit_debugfs_destroy_suite(struct kunit_suite *suite)