diff -r 06600287f11f Lib/unittest/mock.py
--- a/Lib/unittest/mock.py	Fri Jul 17 16:48:48 2015 -0700
+++ b/Lib/unittest/mock.py	Fri Jul 17 17:40:44 2015 -0700
@@ -572,21 +572,21 @@ class NonCallableMock(Base):
 
     def __getattr__(self, name):
         if name in {'_mock_methods', '_mock_unsafe'}:
             raise AttributeError(name)
         elif self._mock_methods is not None:
             if name not in self._mock_methods or name in _all_magics:
                 raise AttributeError("Mock object has no attribute %r" % name)
         elif _is_magic(name):
             raise AttributeError(name)
         if not self._mock_unsafe:
-            if name.startswith(('assert', 'assret')):
+            if name.startswith('assert'):
                 raise AttributeError(name)
 
         result = self._mock_children.get(name)
         if result is _deleted:
             raise AttributeError(name)
         elif result is None:
             wraps = None
             if self._mock_wraps is not None:
                 # XXXX should we get the attribute without triggering code
                 # execution?