private function httpStatusAsImage(int $status): ResponseInterface
    {
        $svg = '<svg xmlns="http://www.w3.org/2000/svg" width="100" height="100"><rect width="100" height="100" fill="#F88" /><text x="5" y="55" font-family="Verdana" font-size="35">' . $status . '</text></svg>';

        // We can't use the actual status code, as browser's won't show images with 4xx/5xx
        return response($svg, StatusCodeInterface::STATUS_OK, [
            'Content-Type'   => 'image/svg+xml',
            'Content-Length' => strlen($svg),
        ]);
    }