diff --git a/test/ecmascript/assert/document.doctype.html b/test/ecmascript/assert/document.doctype.html
new file mode 100644
index 00000000..befb38bc
--- /dev/null
+++ b/test/ecmascript/assert/document.doctype.html
@@ -0,0 +1,25 @@
+<!DOCTYPE html>
+<html>
+<body>
+
+<p>Click the button to display the doctype name of the document.</p>
+
+<button onclick="myFunction()">Try it</button>
+
+<p><strong>Note:</strong> In Internet Explorer 8 and earlier, the doctype property returns <em>null</em> for HTML and XHTML documents, and will only work for XML documents.</p>
+
+<p id="demo"></p>
+
+<script>
+function myFunction() {
+  var x = document.doctype.name;
+  console.assert(x === 'html', 'html');
+}
+
+console.error('document.doctype.html');
+myFunction();
+console.exit(0);
+</script>
+
+</body>
+</html>
