<!DOCTYPE html>
<html>
<title>It tests if 0.5px borders get painted.</title>
<style>
.outer {
	width: 50px;
	height: 50px;
	border: 0.5px solid green;
}
.inner {
	width: 49px;
	height: 49px;
	border: 0.5px solid green;
}
</style>
<body>
	<div class="outer"><div class="inner"></div></div>
</body>