<!doctype html>
<html>
    <head>
        <meta charset="UTF-8">
    </head>
    <body>
        <script>
if (window.internals) {
    internals.invalidateFontCache();
    internals.settings.setShouldAllowUserInstalledFonts(false);
}
if (window.testRunner)
    testRunner.installFakeHelvetica("SingleExtendedCharacter");
        </script>
        <!-- Character known by user installed font only -->
        <td>&#x011721;</td>
    </body>
</html>