diff --git a/tests/wpt/dom/Document-getElementsByClassName.html b/tests/wpt/dom/Document-getElementsByClassName.html
new file mode 100644
index 00000000..db8fac21
--- /dev/null
+++ b/tests/wpt/dom/Document-getElementsByClassName.html
@@ -0,0 +1,26 @@
+<!DOCTYPE html>
+<title>Document.getElementsByClassName</title>
+<link rel="author" title="Intel" href="http://www.intel.com">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<div id="log"></div>
+<script>
+test(function() {
+  var a = document.createElement("a"),
+      b = document.createElement("b");
+  a.className = "foo";
+  this.add_cleanup(function() {document.body.removeChild(a);});
+  document.body.appendChild(a);
+
+  var l = document.getElementsByClassName("foo");
+  assert_true(l instanceof HTMLCollection);
+  assert_equals(l.length, 1);
+
+  b.className = "foo";
+  document.body.appendChild(b);
+  assert_equals(l.length, 2);
+
+  document.body.removeChild(b);
+  assert_equals(l.length, 1);
+}, "getElementsByClassName() should be a live collection");
+</script>
