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Test Info:

<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Cascade: 'revert' keyword interaction with !important</title>
<link rel="author" title="Emilio Cobos Álvarez" href="mailto:emilio@crisal.io">
<link rel="author" title="Mozilla" href="https://mozilla.org">
<link rel="match" href="reference/ref-filled-green-100px-square.xht">
<style>
#outer {
background-color: red;
width: 100px;
height: 100px;
overflow: hidden;
}
#inner {
/* This should win over `revert` */
display: block !important;
}
#inner {
color: green;
background-color: green;
display: revert;
}
</style>
</head>
<body>
<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
<div id="outer">
<span id="inner">
This<br>
is<br>
filler<br>
text.<br>
This<br>
is<br>
filler<br>
text.
</span>
</div>
</body>
</html>