diff -r f44f44b14dfc Lib/unittest/mock.py
--- a/Lib/unittest/mock.py	Fri Jan 20 08:35:18 2017 +0200
+++ b/Lib/unittest/mock.py	Fri Jan 20 19:34:18 2017 +0200
@@ -1765,14 +1765,18 @@ def _get_eq(self):
         ret_val = self.__eq__._mock_return_value
         if ret_val is not DEFAULT:
             return ret_val
-        return self is other
+        if self is other:
+            return True
+        return NotImplemented
     return __eq__
 
 def _get_ne(self):
     def __ne__(other):
         if self.__ne__._mock_return_value is not DEFAULT:
             return DEFAULT
-        return self is not other
+        if self is other:
+            return False
+        return NotImplemented
     return __ne__
 
 def _get_iter(self):
diff -r f44f44b14dfc Lib/unittest/test/testmock/testmock.py
--- a/Lib/unittest/test/testmock/testmock.py	Fri Jan 20 08:35:18 2017 +0200
+++ b/Lib/unittest/test/testmock/testmock.py	Fri Jan 20 19:34:18 2017 +0200
@@ -306,13 +306,24 @@ class MockTest(unittest.TestCase):
 
 
     def test_calls_equal_with_any(self):
+        # Check that equality and non-equality is consistent even when
+        # comparing with mock.ANY
+        mm = mock.MagicMock()
+        self.assertTrue(mm == mm)
+        self.assertFalse(mm != mm)
+        self.assertFalse(mm == mock.MagicMock())
+        self.assertTrue(mm != mock.MagicMock())
+        self.assertTrue(mm == mock.ANY)
+        self.assertFalse(mm != mock.ANY)
+        self.assertTrue(mock.ANY == mm)
+        self.assertFalse(mock.ANY != mm)
+
         call1 = mock.call(mock.MagicMock())
         call2 = mock.call(mock.ANY)
-
-        # Check that equality and non-equality is consistent even when
-        # comparing with mock.ANY
         self.assertTrue(call1 == call2)
         self.assertFalse(call1 != call2)
+        self.assertTrue(call2 == call1)
+        self.assertFalse(call2 != call1)
 
 
     def test_assert_called_with(self):