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diff --git a/testing/web-platform/tests/dom/collections/HTMLCollection-iterator.html b/testing/web-platform/tests/dom/collections/HTMLCollection-iterator.html
new file mode 100644
index 0000000000..6296fd1b2d
--- /dev/null
+++ b/testing/web-platform/tests/dom/collections/HTMLCollection-iterator.html
@@ -0,0 +1,45 @@
+<!doctype html>
+<meta charset="utf-8">
+<link rel="help" href="https://dom.spec.whatwg.org/#interface-htmlcollection">
+<link rel="help" href="https://webidl.spec.whatwg.org/#es-iterator">
+<title>HTMLCollection @@iterator Test</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<p id="1"></p>
+<p id="2"></p>
+<p id="3"></p>
+<p id="4"></p>
+<p id="5"></p>
+<script>
+"use strict";
+
+const paragraphs = document.getElementsByTagName("p");
+
+test(() => {
+  assert_true("length" in paragraphs);
+}, "HTMLCollection has length method.");
+
+test(() => {
+  assert_false("values" in paragraphs);
+}, "HTMLCollection does not have iterable's values method.");
+
+test(() => {
+  assert_false("entries" in paragraphs);
+}, "HTMLCollection does not have iterable's entries method.");
+
+test(() => {
+  assert_false("forEach" in paragraphs);
+}, "HTMLCollection does not have iterable's forEach method.");
+
+test(() => {
+  assert_true(Symbol.iterator in paragraphs);
+}, "HTMLCollection has Symbol.iterator.");
+
+test(() => {
+  const ids = "12345";
+  let idx = 0;
+  for (const element of paragraphs) {
+    assert_equals(element.getAttribute("id"), ids[idx++]);
+  }
+}, "HTMLCollection is iterable via for-of loop.");
+</script>