def METHOD_NAME(self):
    source = AuxCoord(self.src_levels.data)
    metadata = self.src_levels.metadata._asdict()
    metadata["coord_system"] = None
    metadata["climatological"] = None
    source.metadata = metadata
    for axis in self.axes:
        result = relevel(self.cube, source, [0, 12, 13], axis=axis)
        self.assertEqual(result.shape, (3, 1, 1))
        assert_array_equal(result.data.flatten(), [0, 120, np.nan])