chromium/third_party/blink/web_tests/animations/opacity-transform-animation-expected.html

<!DOCTYPE html>
<html>
<head>
  <style type="text/css" media="screen">
    .target {
        position: absolute;
        top: 100px;
        left: 0;
        height: 100px;
        width: 100px;
    }
    #box {
        background-color: green;
        transform: translateX(200px) scale(1) translateZ(0);
        opacity: 0.5;
    }
    #indicator {
        left: 200px;
        background-color: red;
    }
  </style>
</head>
<body>
<div class="target" id="indicator"></div>
<div class="target" id="box"></div>
<div id="result">
PASS - "transform.4" property for "box" element at 0.5s saw something close to: 200</div>
</body>
</html>