def METHOD_NAME(client, response):
    response.get(f"https://api.mollie.com/v2/orders/{ORDER_ID}", "order_single")
    order = client.orders.get(ORDER_ID)
    with pytest.raises(IdentifierError) as excinfo:
        order.shipments.get("invalid")
    assert str(excinfo.value) == "Invalid shipment ID 'invalid', it should start with 'shp_'."