diff -r f1a25c088b8f Lib/test/test_cmd_line_script.py
--- a/Lib/test/test_cmd_line_script.py	Fri Nov 02 14:49:02 2012 +0100
+++ b/Lib/test/test_cmd_line_script.py	Fri Nov 02 19:52:52 2012 +0200
@@ -368,7 +368,9 @@
         with temp_dir() as script_dir:
             script_name = _make_test_script(script_dir,
                     '\udcf1\udcea\udcf0\udce8\udcef\udcf2')
-            self._check_script(script_name, script_name, script_name,
+            expected_file = (script_name.encode('utf-8', 'surrogateescape')
+                    .decode(sys.getfilesystemencoding(), 'surrogateescape'))
+            self._check_script(script_name, expected_file, expected_file,
                                script_dir, None,
                                importlib.machinery.SourceFileLoader)