Arsse/tests/docroot/Icon/SVG1.php

<?php return [
    'mime'    => "image/svg+xml",
    'content' => '<svg xmlns="http://www.w3.org/2000/svg" width="900" height="600"><rect fill="#fff" height="600" width="900"/><circle fill="#bc002d" cx="450" cy="300" r="180"/></svg>',
];