diff -r ebb1a16de89b Lib/test/test_os.py
--- a/Lib/test/test_os.py	Sat Apr 16 11:51:31 2016 +0000
+++ b/Lib/test/test_os.py	Sat Apr 16 17:16:50 2016 +0300
@@ -857,7 +857,7 @@
 
     def test_walk_topdown(self):
         # Walk top-down.
-        all = list(os.walk(self.walk_path))
+        all = list(self.walk(self.walk_path))
 
         self.assertEqual(len(all), 4)
         # We can't know which order SUB1 and SUB2 will appear in.