diff --git a/test/ecmascript/assert/element.contains.html b/test/ecmascript/assert/element.contains.html
new file mode 100644
index 00000000..ce68554c
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+++ b/test/ecmascript/assert/element.contains.html
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+<!DOCTYPE html>
+<html>
+<head>
+<style>
+#myDIV {
+  border: 1px solid black;
+}
+</style>
+</head>
+<body>
+
+<div id="myDIV">
+  <p>I am a p element inside div, and I have a <span id="mySPAN"><b>span</b></span> element inside of me.</p>
+</div>
+
+<span id="mySPAN2"><b>span</b></span>
+<p>Click the button to find out if the div element contains a span element.</p>
+
+<button onclick="myFunction()">Try it</button>
+
+<p id="demo"></p>
+
+<script>
+function myFunction() {
+  var span = document.getElementById("mySPAN");
+  var span2 = document.getElementById("mySPAN2");
+  var div = document.getElementById("myDIV").contains(span);
+  var div2 = document.getElementById("myDIV").contains(span2);
+  console.assert(div, 'myDIV contains mySPAN');
+  console.assert(!div2, '!myDIV contains mySPAN2');
+}
+
+console.error('element.contains.html');
+myFunction();
+console.exit(0);
+</script>
+
+</body>
+</html>
