   border-image are rescaled down, from sliced 64px to
      56px while the 2 left and right sides border-image are
      rescaled up, from sliced 64px to 72px.
      */
    }
  </style>

  <div id="first-subtest"></div>

  <div id="second-subtest"></div><br>

  <div id="third-subtest"></div>
