  
      @modify_settings(ITEMS={'remove': ['b', 'd']})
      @modify_settings(ITEMS={'append': ['b'], 'prepend': ['d']})
      def test_method_list_override_nested_order(self):
          self.assertListEqual(settings.ITEMS, ['d', 'c', 'b'])
  
      @override_settings(TEST='override2')
      def test_method_override(self):
          self.assertEqual(settings.TEST, 'override2')
          self.assertEqual(settings.TEST_OUTER, 'outer')
 
</s> remove         self.assertListEqual(settings.ITEMS, ['a', 'b', 'd', 'e'])
 </s> add         self.assertEqual(settings.ITEMS, ['a', 'b', 'd', 'e']) </s> remove         self.assertListEqual(settings.ITEMS, ['a', 'b', 'd', 'e'])
 </s> add         self.assertEqual(settings.ITEMS, ['a', 'b', 'd', 'e']) </s> remove         self.assertListEqual(settings.ITEMS, ['b', 'c', 'd'])
        self.assertListEqual(settings.ITEMS_OUTER, [1, 2, 3])
 </s> add         self.assertEqual(settings.ITEMS, ['b', 'c', 'd'])
        self.assertEqual(settings.ITEMS_OUTER, [1, 2, 3]) </s> remove         self.assertListEqual(settings.ITEMS, ['b', 'c', 'd'])
 </s> add         self.assertEqual(settings.ITEMS, ['b', 'c', 'd']) </s> remove         self.assertListEqual(settings.ITEMS, ['a', 'b', 'e', 'f'])
        self.assertListEqual(settings.ITEMS_OUTER, [1, 2, 3])
 </s> add         self.assertEqual(settings.ITEMS, ['a', 'b', 'e', 'f'])
        self.assertEqual(settings.ITEMS_OUTER, [1, 2, 3])
        self.assertEqual(settings.ITEMS, ['d', 'c', 'b'])
  
      @modify_settings(ITEMS={'remove': ['b', 'd']})
      @modify_settings(ITEMS={'append': ['b'], 'prepend': ['d']})
      def test_method_list_override_nested_order(self):
        self.assertEqual(settings.ITEMS, ['d', 'c', 'b'])
  
      @override_settings(TEST='override2')
      def test_method_override(self):
          self.assertEqual(settings.TEST, 'override2')
          self.assertEqual(settings.TEST_OUTER, 'outer')
keep keep keep keep replace keep keep keep keep keep
 Replaced type-specific assertions with assertEqual().

Python docs say, "it's usually not necessary to invoke these methods directly." 
tests/settings_tests/tests.py