def METHOD_NAME():
    """Test if malformed notebook_urls raise proper exceptions."""
    lc = KeplerLightCurve.read(KEPLER10)
    lc = lc.normalize().remove_nans().flatten()
    with pytest.raises(ValueError) as exc:
        lc.interact_bls(notebook_url="")
    assert "Empty host value" in exc.value.args[0]