Index: test_os.py
===================================================================
--- test_os.py	(revision 88915)
+++ test_os.py	(working copy)
@@ -401,6 +401,12 @@
         self.assertEqual(all[1 + flipped], (sub1_path, ["SUB11"], ["tmp2"]))
         self.assertEqual(all[2 + flipped], (sub11_path, [], []))
         self.assertEqual(all[3 - 2 * flipped], sub2_tree)
+        
+        # test namedtuple returned by walk
+        for dirinfo in all:
+            self.assertEqual(dirinfo[0], dirinfo.dirpath)
+            self.assertEqual(dirinfo[1], dirinfo.dirnames)
+            self.assertEqual(dirinfo[2], dirinfo.filenames)
 
         # Prune the search.
         all = []
@@ -427,6 +433,12 @@
         self.assertEqual(all[flipped + 1], (sub1_path, ["SUB11"], ["tmp2"]))
         self.assertEqual(all[2 - 2 * flipped], sub2_tree)
 
+        # test namedtuple returned by walk
+        for dirinfo in all:
+            self.assertEqual(dirinfo[0], dirinfo.dirpath)
+            self.assertEqual(dirinfo[1], dirinfo.dirnames)
+            self.assertEqual(dirinfo[2], dirinfo.filenames)
+
         if hasattr(os, "symlink"):
             # Walk, following symlinks.
             for root, dirs, files in os.walk(walk_path, followlinks=True):