def METHOD_NAME(filename, **kwargs):
    """
    Return the full path to a test file in the ``data/test`` directory.
    Parameters
    ----------
    filename : `str`
        The name of the file inside the ``data/test`` directory.
    Returns
    -------
    filepath : `str`
        The full path to the file.
    Notes
    -----
    This is a wrapper around `astropy.utils.data.get_pkg_data_filename` which
    sets the ``package`` kwarg to be 'sunpy.data.test`.
    """
    if isinstance(filename, Path):
        # NOTE: get_pkg_data_filename does not accept Path objects
        filename = filename.as_posix()
    return get_pkg_data_filename(filename, package="sunpy.data.test", **kwargs)