diff -r 8ae1c28445f8 Lib/test/test_unicode.py
--- a/Lib/test/test_unicode.py	Fri Mar 22 15:19:24 2013 +0000
+++ b/Lib/test/test_unicode.py	Sat Mar 23 22:23:34 2013 +0100
@@ -341,6 +341,10 @@
         # apparently there are no titlecased (Lt) non-BMP chars in Unicode 6
         for ch in [u'\U00010429', u'\U0001044E', u'\U0001F40D', u'\U0001F46F']:
             self.assertFalse(ch.istitle(), '{!r} is not title'.format(ch))
+    
+    def test_issue7267(self):
+        self.assertEqual(u'{0:c}'.format(256),  u'\u0100')
+        self.assertEqual(u'{0:c}'.format(257),  u'\u0101')
 
     def test_isspace(self):
         string_tests.MixinStrUnicodeUserStringTest.test_isspace(self)