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chromium/third_party/blink/web_tests/transforms/identity-matrix.html 

 <head>
<style>
        div {
            float:left;
            width:100px;
            height:100px;
            background-color:skyblue;
            border: 5px solid black;
            margin:5px;
        }
        .matrix{ transform: matrix(1, 0, 0, 1, 0, 0); }
</style>
</head>
<body>
The following divs should be identical:
    <br>

    <div></div>
    <div class="matrix"></div>
</body>