diff --git a/Lib/test/test_os.py b/Lib/test/test_os.py
index 9e0bef573cb..b7e1c45c799 100644
--- a/Lib/test/test_os.py
+++ b/Lib/test/test_os.py
@@ -923,7 +923,7 @@ def setUp(self):
                               ["broken_link", "broken_link2", "broken_link3",
                                "tmp3"])
         else:
-            self.sub2_tree = (sub2_path, [], ["tmp3"])
+            self.sub2_tree = (sub2_path, ["SUB21"], ["tmp3"])
 
         os.chmod(sub21_path, 0)
         try: