diff -r 4a48450f2505 Lib/test/test_descr.py
--- a/Lib/test/test_descr.py	Sat Jun 14 20:41:22 2014 -0700
+++ b/Lib/test/test_descr.py	Sun Jun 15 11:35:27 2014 +0300
@@ -1149,7 +1149,7 @@
         except (TypeError, UnicodeEncodeError):
             pass
         else:
-            raise TestFailed("[chr(128)] slots not caught")
+            self.fail("[chr(128)] slots not caught")
 
         # Test leaks
         class Counted(object):