| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <title>Black square reference</title> | |
| <style> | |
| .test { background-color: #000000; width: 12em; height: 12em; } | |
| </style> | |
| <body> | |
| <p>Test passes if you see a black square, and no red.</p> | |
| <div class="test"></div> | |
| </body> |