public async Task UpdateOrderTest()
        {
            // Arrange
            var args = new OrderUpdateArguments
            {
                OrderId = "order-id"
            };

            _stripe.Post(
                Arg.Is <StripeRequest <OrderUpdateArguments, Order> >(
                    a => a.UrlPath == "orders/" + args.OrderId && a.Model == args), _cancellationToken)
            .Returns(Task.FromResult(new StripeResponse <Order>()));

            // Act
            var response = await _client.UpdateOrder(args, _cancellationToken);

            // Assert
            response.Should().NotBeNull();
        }