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+<!DOCTYPE html>
+<html class="reftest-wait">
+<meta charset="utf-8">
+<title>Test for bug 1066554 - Shadow DOM loads SVG stylesheets as needed</title>
+<body>
+  <div id="x"></div>
+  <script>
+    function insertShadowSVG() {
+      var x = document.getElementById("x");
+      x.attachShadow({ mode: "open" });
+      x.shadowRoot.innerHTML =
+        '<svg width="50px" height="10px"> \
+           <switch> \
+             <foreignObject width="50px" height="50px"> \
+               <div style="width: 100px; height: 10px; background: red;"></div> \
+             </foreignObject> \
+           </switch> \
+         </svg>';
+      document.documentElement.removeAttribute("class");
+    }
+    window.addEventListener("MozReftestInvalidate", insertShadowSVG);
+  </script>
+</body>
+</html>