der-left-width: 1in;
                display: inline-block;
            }

            span.block-descendant
            {
                display: block;
                height: 0.5in;
            }
        </style>
    </head>
    <body>
        <p>Test passes if there is a filled black square.</p>

        <div>
            <span id="inline-block">
				        <span class="block-descendant"></span>
				        <span class="block-descendant"></span>
        	  </span>
        </div>

    </body>
</html>
