
		@supports (background: blue) {
			@unknown;
			.test4 { background: green; }
		}
		@supports (background: blue) {
			.test5 { background: green; }
			@unknown {
				.test5 { background: red; }
			}
		}
	</style>
</head>
<body>
	<p>Test passes if there is a <strong>filled green square</strong> and <strong>no red</strong>.</p>
	<div class="test1"></div>
	<div class="test2"></div>
	<div class="test3"></div>
	<div class="test4"></div>
	<div class="test5"></div>
</body>
</html>
