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    <body>
        <p>foreignObject should not isolate. The test passes if you see a lime square.</p>
        <svg xmlns="http://www.w3.org/2000/svg" version="1.1" width="200px" height="200px">
            <rect x="0" y="0" width="200" height="200" style="fill: yellow"/>
            <foreignObject width="200" height="200">
                <svg xmlns="http://www.w3.org/2000/svg" version="1.1" width="200px" height="200px">
                    <rect x="0" y="0" width="200" height="200" style="fill: red; mix-blend-mode: difference"/>
                </svg>
            </foreignObject>
        </svg>
    </body>
</html>