diff --git a/test_harnesses/cross_origin_iframe.html b/test_harnesses/cross_origin_iframe.html
new file mode 100644
index 000000000..15a87f387
--- /dev/null
+++ b/test_harnesses/cross_origin_iframe.html
@@ -0,0 +1,29 @@
+<!DOCTYPE html>
+<html>
+
+<head>
+  <meta charset="UTF-8">
+  <link rel="icon" href="data:;base64,iVBORw0KGgo=">
+  <title>Cross origin iFrame</title>
+  <style type="text/css" media="screen">
+    body {
+      background-color: black;
+      color: #999;
+      height: 4000px;
+    }
+
+    iframe {
+      width: 800px;
+      height: 400px;
+      border: 2px solid green;
+    }
+  </style>
+</head>
+
+<body>
+  Iframe from a different origin as its parent:<br />
+  <iframe src="https://example.com" />
+
+</body>
+
+</html>
