diff --git a/tests/playgrounds/iframe.html b/tests/playgrounds/iframe.html
new file mode 100644
index 000000000..9c57fbf00
--- /dev/null
+++ b/tests/playgrounds/iframe.html
@@ -0,0 +1,39 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>Blockly &lt;iframe&gt; Playground</title>
+<style>
+  html, body {
+    border: 0;
+    margin: 0;
+    padding: 0;
+    font-family: sans-serif;
+  }
+  h1#title {
+    border: 0;
+    margin: 2px;
+    padding: 0;
+    width: %100;
+  }
+  #playground-iframe {
+    border: 0;
+    width: %100;
+  }
+</style>
+<script type="text/javascript">
+  var onWindowResize = function() {
+    var iframe = document.getElementById('playground-iframe');
+    var top = iframe.getBoundingClientRect().top;
+    iframe.height = window.innerHeight - top;
+    iframe.width = window.innerWidth;
+  };
+  window.addEventListener("resize", onWindowResize);
+  window.addEventListener("load", onWindowResize);
+</script>
+</head>
+<body>
+  <h1 id="title">Outer Frame</h1>
+  <iframe id="playground-iframe" src="../playground.html">
+</body>
+</html>
\ No newline at end of file
