<!DOCTYPE html>
<html>
<head>
<title>CSS Flexible Box Test: align-content_flex-start</title>
<link rel="stylesheet" href="support/test-style.css">
<style>
#test {
  height: 200px;
  width: 80px;
}
</style>
</head>
<body>
<p>Test passes if:<br>
1. the rectangle 1, 2, 3 show up in a vertical column in a red rectangle and no gap between them.<br>
2. the rectangle 1, 2, 3 appear in upper left of red rectangle.</p>
<div id=test><div id=test01>1</div><div id=test02>2</div><div id=test03>3</div></div>
</body>
</html>