<svg xmlns="http://www.w3.org/2000/svg">
    <text id="text">
        <tspan>PASS</tspan>
    </text>
    <script>
        if (window.testRunner)
            testRunner.dumpAsText();
        var slotElement = document.createElementNS("http://www.w3.org/1999/xhtml", "slot");
        slotElement.innerHTML = "Some text";
        var parent = document.getElementById("text");
        parent.appendChild(slotElement);
    </script>
</svg>