<!DOCTYPE html>
<html style="font-size: 16px">
<head>
<meta name="viewport" content="width=800">
<style>
body {
  width: 800px;
  margin: 0;
  overflow-y: hidden;
}
#i {
  padding:6px 10px;
  height:29px;
  box-sizing:border-box;
}
</style>
</head>
<body style="font-size: 2.5rem">
This test passes if the input field is not autosized.
<br>
<span>
  <input id="i" value="should not autosize" />
</span>
<br><br>
Lorem ipsum dolor sit amet, consectetur adipisicing elit,
sed do eiusmod tempor incididunt ut labore et dolore magna
aliqua. Ut enim ad minim veniam, quis nostrud exercitation
ullamco laboris nisi ut aliquip ex ea commodo consequat.
</body>
</html>