diff -r 000000000000 -r 6474c204b198 layout/reftests/xul-document-load/test017-020.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/layout/reftests/xul-document-load/test017-020.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,13 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/  */
+
+// check that the second node under the document element is a PI with the
+// specified .target and .data
+function checkDOM(target, data) {
+  // assume there are no whitespace nodes in XUL
+  var piNode = document.documentElement.childNodes[1];
+  if (!piNode || piNode.nodeType != Node.PROCESSING_INSTRUCTION_NODE ||
+      piNode.target != target || piNode.data != data) {
+    document.documentElement.style.backgroundColor = "red";
+  }
+}