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Test Info:

<style id="s">
.container {
height: 20px;
}
.overflow {
height: 30px;
}
body {
width: 300px;
column-width: 100px;
}
</style>
<body>
<div class="container">
<div class="overflow"></div>
</div>
<div class="container">
<div class="overflow"></div>
</div>
</body>
</html>