            #div2
            {
                margin: 50px;
            }
            #div3
            {
                background: blue;
                right: 0;
                position: absolute;
                top: 0;
            }
        </style>
    </head>
    <body>
        <p>Test passes if the blue box is in the upper-right corner of the black box.</p>
        <div id="div1">
            <div id="div2">
                <div id="div3"></div>
            </div>
        </di