diff -r 967af1815967 Lib/unittest/test/testmock/testmock.py
--- a/Lib/unittest/test/testmock/testmock.py	Mon Sep 09 18:48:24 2013 -0500
+++ b/Lib/unittest/test/testmock/testmock.py	Tue Sep 10 14:44:46 2013 +0800
@@ -1302,20 +1302,6 @@
             self.assertEqual(m.method_calls, [])
 
 
-    def test_attribute_deletion(self):
-        # this behaviour isn't *useful*, but at least it's now tested...
-        for Klass in Mock, MagicMock, NonCallableMagicMock, NonCallableMock:
-            m = Klass()
-            original = m.foo
-            m.foo = 3
-            del m.foo
-            self.assertEqual(m.foo, original)
-
-            new = m.foo = Mock()
-            del m.foo
-            self.assertEqual(m.foo, new)
-
-
     def test_mock_parents(self):
         for Klass in Mock, MagicMock:
             m = Klass()
@@ -1379,7 +1365,8 @@
 
 
     def test_attribute_deletion(self):
-        for mock in Mock(), MagicMock():
+        for mock in Mock(), MagicMock(), NonCallableMagicMock(),\
+                NonCallableMock():
             self.assertTrue(hasattr(mock, 'm'))
 
             del mock.m