              self.filter_backend.filter_queryset(None, None, None)
  
      def test_get_schema_fields_checks_for_coreapi(self):
          filters.coreapi = None
          with pytest.raises(AssertionError):
              self.filter_backend.get_schema_fields({})
 
</s>
    @pytest.mark.skipif(not coreschema, reason='coreschema is not installed')
              self.filter_backend.filter_queryset(None, None, None)
  
    @pytest.mark.skipif(not coreschema, reason='coreschema is not installed')
      def test_get_schema_fields_checks_for_coreapi(self):
          filters.coreapi = None
          with pytest.raises(AssertionError):
              self.filter_backend.get_schema_fields({})
keep add keep keep keep keep
 Add "optionals not required" build (#6047)
tests/test_filters.py