operty" />
        <meta name="flags" content="" />
        <meta name="assert" content="The 'height' property sets a positive zero length value in pixels." />
        <style type="text/css">* { margin: 0; padding: 0 }
            div
            {
                background: red;
                height: +0px;
            }
        </style>
    </head>
    <body>
        <p>Test passes if there is no red visible on the page.</p>
        <div>Filler Text</div>
    </body>
</html>