def METHOD_NAME(self):
    """
    A very simple test, to confirm that t2smap creates output
    files when combmode is set to 'paid'.
    """
    data_dir = get_test_data_path()
    data = [
        op.join(data_dir, "echo1.nii.gz"),
        op.join(data_dir, "echo2.nii.gz"),
        op.join(data_dir, "echo3.nii.gz"),
    ]
    out_dir = "TED.echo1.t2smap"
    workflows.t2smap_workflow(
        data, [14.5, 38.5, 62.5], combmode="paid", fitmode="all", out_dir=out_dir
    )
    # Check outputs
    assert op.isfile(op.join(out_dir, "desc-optcom_bold.nii.gz"))
    img = nib.load(op.join(out_dir, "T2starmap.nii.gz"))
    assert len(img.shape) == 3
    img = nib.load(op.join(out_dir, "S0map.nii.gz"))
    assert len(img.shape) == 3
    img = nib.load(op.join(out_dir, "desc-limited_T2starmap.nii.gz"))
    assert len(img.shape) == 3
    img = nib.load(op.join(out_dir, "desc-limited_S0map.nii.gz"))
    assert len(img.shape) == 3
    img = nib.load(op.join(out_dir, "desc-optcom_bold.nii.gz"))
    assert len(img.shape) == 4