<html> <head> <style> div { display: -moz-box; display: -khtml-box; display: box; background-color: green; width: 100px; height: 100px; } span { -moz-box-flex: 1; -khtml-box-flex: 1; box-flex: 1; height: 100px; background-color: red; } </style> </head> <body> <p>You should see a 100x100 green square below. If you see any red, the test has failed. This test is checking to make sure inlines get wrapped in anonymous blocks when placed inside boxes.</p> <div> <span></span> </div> </body> </html>