def METHOD_NAME(self, mocked_dataset):
    """Pass only one dict input when two (list) are expected."""
    pattern = r"expected 2 input\(s\) \['ds1', 'ds2'\], but "
    pattern += r"got the following 1 input\(s\) instead."
    with pytest.raises(ValueError, match=pattern):
        node(two_in_first_out, ["ds1", "ds2"], "A").run({"ds1": mocked_dataset})