def METHOD_NAME(self):
    result = hips2fits.query_with_wcs(
        hips=self.hips,
        wcs=self.w,
        get_query_payload=False,
        format='png'
    )
    # We must get a numpy array with 3 dimensions, and the last one should be of size 4 (RGBA)
    assert isinstance(result, np.ndarray) and result.shape[2] == 4