dict(
          testcase_name="lists_of_lists_axis_1",
          params=[[{"a": {}, "b": [3, 4]}, {"a": {}, "b": [5]}],
                  [{"a": {}, "b": [7, 8, 9]}, {"a": {}, "b": [2, 8, 2]}],
                  [{"a": {}, "b": []}, {"a": {}, "b": [4]}]],