diff -r de2cd04e5101 Lib/test/test_string.py
--- a/Lib/test/test_string.py	Wed Mar 16 16:14:43 2011 -0400
+++ b/Lib/test/test_string.py	Thu Mar 17 01:00:57 2011 +0100
@@ -114,11 +114,12 @@
 
     def test_vformat_assert(self):
         cls = string.Formatter()
+        args = ()
         kwargs = {
             "i": 100
         }
         self.assertRaises(ValueError, cls._vformat,
-                cls.format, "{0}", kwargs, set(), -2)
+                "{i}", args, kwargs, set(), -2)
 
     def test_convert_field(self):
         cls = string.Formatter()