
            }
            #reference
            {
                background-color: black;
                height: 3in;
                margin-left: 5px;
            }
            #test
            {
                border-top-style: solid;
                border-top-width: +3in;
            }
        </style>
    </head>
    <body>
        <p>Test passes if the 2 filled black rectangles have the <strong>same height</strong>.</p>
        <div id="test"></div>
        <div id="reference"></div>
    </body>