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chromium/third_party/blink/web_tests/fast/borders/table-borders.html 

<html>
<head>
    <style type="text/css">
      table {
        margin: 20px;
        display: inline-table;
      }
      
      .wide td {
/*        border-width: 10px;*/
      }

      .transformed {
        transform: rotate(45deg);
      }
    </style>
</head>
<body>
  <!-- <table border="1">
    <tr><td>&nbsp;</td><td>&nbsp;</td></tr>
    <tr><td>&nbsp;</td><td>&nbsp;</td></tr>
  </table>

  <table border="5" class="wide">
    <tr><td>&nbsp;</td></tr>
  </table> -->

  <table border="5" class="wide transformed">
    <tr><td>&nbsp;</td></tr>
  </table>
  
</body>
</html>