<!DOCTYPE html>
<html class="reftest-wait">
  <head>
    <script>
      function tweak() {
        var b = document.getElementsByTagName("span")[0];
        b.parentNode.removeChild(b);
        document.documentElement.removeAttribute("class");
      }
      window.addEventListener("MozReftestInvalidate", tweak, false);
    </script>
  </head>
  <body>
    <div style="-moz-column-count: 2;
                height: 50px;
                width: 100px;
                background: yellow">
      <span>0 1 2 3 4 5 6 7 8 9 0</span>a
    </div>
  </body>
</html>