diff -r 492eba054e59 Lib/test/test_posixpath.py
--- a/Lib/test/test_posixpath.py	Wed May 08 11:16:33 2013 +0300
+++ b/Lib/test/test_posixpath.py	Wed May 08 18:35:49 2013 +1000
@@ -261,7 +261,8 @@
                 # expanduser should fall back to using the password database
                 del env['HOME']
                 home = pwd.getpwuid(os.getuid()).pw_dir
-                self.assertEqual(posixpath.expanduser("~"), home)
+                # $HOME can end with a trailing /, so strip it (see #17809)
+                self.assertEqual(posixpath.expanduser("~"), home.rstrip("/"))
 
     def test_normpath(self):
         self.assertEqual(posixpath.normpath(""), ".")