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<!DOCTYPE html>
<meta charset="utf-8">
<title>Reference: no red rectangle visible</title>
<style>
html, body {
margin: 0;
}
.outer {
position: absolute;
}
.inner {
position: absolute;
top: 0;
left: 0;
width: 200px;
background: red;
}
img {
display: block;
height: 100%;
}
</style>
<p>Test passes if there is no red rectangle visible.</p>
<div class="outer">
<div class="inner"><img></div>
</div>