diff --git a/layout/reftests/bugs/474472-1-ref.html b/layout/reftests/bugs/474472-1-ref.html
new file mode 100644
index 000000000000..9e7aa2bb976e
--- /dev/null
+++ b/layout/reftests/bugs/474472-1-ref.html
@@ -0,0 +1,6 @@
+<!DOCTYPE html>
+<html>
+  <body>
+    <iframe id="foo" src="data:text/html,<body bgcolor='lime'>PASS</body>"></iframe>
+  </body>
+</html>
diff --git a/layout/reftests/bugs/474472-1.html b/layout/reftests/bugs/474472-1.html
new file mode 100644
index 000000000000..86b25bba0649
--- /dev/null
+++ b/layout/reftests/bugs/474472-1.html
@@ -0,0 +1,25 @@
+<!DOCTYPE html>
+<html class="reftest-wait">
+  <body>
+    <iframe id="foo" src="data:text/html,<body bgcolor='red'>FAIL</body>"></iframe> 
+    <script type="text/javascript">
+      // Globals
+      var foo = document.getElementById('foo');
+      var win = foo.contentWindow;
+
+      // Start the chain of execution when iframe's window loads
+      win.onload = iframeWindowLoaded;
+
+      function iframeWindowLoaded() {
+        setTimeout("tweak()", 0);
+      }
+      function tweak() {
+        win.location ="data:text/html,<body bgcolor='lime'>PASS</body>";
+        foo.onload = snapshot;
+      }
+      function snapshot() {
+        document.documentElement.className = '';
+      }
+    </script>
+  </body>
+</html>
diff --git a/layout/reftests/bugs/reftest.list b/layout/reftests/bugs/reftest.list
index dc990e93047d..ae8d915728fa 100644
--- a/layout/reftests/bugs/reftest.list
+++ b/layout/reftests/bugs/reftest.list
@@ -1031,3 +1031,4 @@ fails == 461512-1.html 461512-1-ref.html # Bug 461512
 == 472500-1.xul 472500-1-ref.xul
 == 474336-1.xul 474336-1-ref.xul
 == 474417-1.html 474417-1-ref.html
+== 474472-1.html 474472-1-ref.html
