<!DOCTYPE html>
<html class="reftest-wait">
  <head>
  </head>
  <body>
    <div id="host"></div>
    <script>
      var host = document.getElementById("host");
      var root = host.createShadowRoot();
      root.innerHTML = 'a <content></content> c';

      function tweak() {
        var span = document.createElement("span");
        span.innerHTML = "b";

        // Span should be distributed to insertion point between 'a' and 'c'.
        host.appendChild(span);

        document.documentElement.removeAttribute("class");
      }

      window.addEventListener("MozReftestInvalidate", tweak, false);
    </script>
  </body>
</html>