          instance_view = InstanceView.as_view(filter_backends=(ExclusiveFilterBackend,))
          request = factory.get('/1')
          response = instance_view(request, pk=1).render()
          self.assertEqual(response.status_code, status.HTTP_404_NOT_FOUND)
          self.assertEqual(response.data, {'detail': 'Not found'})
  
      def test_get_instance_view_will_return_single_object_when_filter_does_not_exclude_it(self):
          """
          GET requests to RetrieveUpdateDestroyAPIView should return a single object when not excluded
          """
 
</s> remove         data = {'detail': _('Permission denied.')}
 </s> add         msg = _('Permission denied.')
        data = {'detail': six.text_type(msg)} </s> remove         data = {'detail': _('Not found.')}
 </s> add         msg = _('Not found.')
        data = {'detail': six.text_type(msg)} </s> remove #### New pagination schemes.
 </s> add #### New schemes, including cursor pagination.
        self.assertEqual(response.data, {'detail': 'Not found.'})
          instance_view = InstanceView.as_view(filter_backends=(ExclusiveFilterBackend,))
          request = factory.get('/1')
          response = instance_view(request, pk=1).render()
          self.assertEqual(response.status_code, status.HTTP_404_NOT_FOUND)
        self.assertEqual(response.data, {'detail': 'Not found.'})
  
      def test_get_instance_view_will_return_single_object_when_filter_does_not_exclude_it(self):
          """
          GET requests to RetrieveUpdateDestroyAPIView should return a single object when not excluded
          """
keep keep keep keep replace keep keep keep keep keep
 Fix error text in test. 
tests/test_generics.py