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diff --git a/testing/web-platform/tests/html/dom/documents/dom-tree-accessors/document.embeds-document.plugins-01.html b/testing/web-platform/tests/html/dom/documents/dom-tree-accessors/document.embeds-document.plugins-01.html
new file mode 100644
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+++ b/testing/web-platform/tests/html/dom/documents/dom-tree-accessors/document.embeds-document.plugins-01.html
@@ -0,0 +1,87 @@
+<!DOCTYPE html>
+<title>document.embeds and document.plugins</title>
+<link rel="author" title="Ms2ger" href="mailto:ms2ger@gmail.com">
+<link rel="help" href="https://html.spec.whatwg.org/multipage/#dom-document-embeds">
+<link rel="help" href="https://html.spec.whatwg.org/multipage/#dom-document-plugins">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<div id="log"></div>
+<script>
+test(function() {
+  assert_equals(document.embeds, document.embeds,
+                "embeds should be constant");
+  assert_equals(document.plugins, document.plugins,
+                "plugins should be constant");
+  assert_equals(document.embeds, document.plugins,
+                "embeds should be the same as plugins");
+  assert_equals(document.embeds.length, 0);
+  assert_equals(document.plugins.length, 0);
+}, "No plugins");
+
+test(function() {
+  var embed = document.body.appendChild(document.createElement("embed"));
+  this.add_cleanup(function() { document.body.removeChild(embed) });
+
+  assert_array_equals(document.embeds, [embed]);
+  assert_array_equals(document.plugins, [embed]);
+
+  assert_equals(document.embeds, document.embeds,
+                "embeds should be constant");
+  assert_equals(document.plugins, document.plugins,
+                "plugins should be constant");
+  assert_equals(document.embeds, document.plugins,
+                "embeds should be the same as plugins");
+}, "One plugin");
+
+test(function() {
+  var embed1 = document.createElement("embed"),
+      embed2 = document.createElement("embed");
+
+  document.body.appendChild(embed2);
+  this.add_cleanup(function() { document.body.removeChild(embed2) });
+  document.body.insertBefore(embed1, embed2);
+  this.add_cleanup(function() { document.body.removeChild(embed1) });
+
+  assert_array_equals(document.embeds, [embed1, embed2]);
+  assert_array_equals(document.plugins, [embed1, embed2]);
+
+  assert_equals(document.embeds, document.embeds,
+                "embeds should be constant");
+  assert_equals(document.plugins, document.plugins,
+                "plugins should be constant");
+  assert_equals(document.embeds, document.plugins,
+                "embeds should be the same as plugins");
+}, "Two plugins");
+
+test(function() {
+  var embed1 = document.createElement("embed"),
+      embed2 = document.createElement("embed");
+  document.body.appendChild(embed1);
+  this.add_cleanup(function() { document.body.removeChild(embed1) });
+  var embeds = document.embeds;
+  assert_true(embeds instanceof HTMLCollection);
+  assert_equals(embeds.length, 1);
+
+  document.body.appendChild(embed2);
+  assert_equals(embeds.length, 2);
+
+  document.body.removeChild(embed2);
+  assert_equals(embeds.length, 1);
+}, "Document.embeds should be a live collection");
+
+test(function() {
+  var embed1 = document.createElement("embed"),
+      embed2 = document.createElement("embed");
+  document.body.appendChild(embed1);
+  this.add_cleanup(function() { document.body.removeChild(embed1) });
+  var pls = document.plugins;
+  assert_true(pls instanceof HTMLCollection);
+  assert_equals(pls.length, 1);
+
+  document.body.appendChild(embed2);
+  assert_equals(pls.length, 2);
+
+  document.body.removeChild(embed2);
+  assert_equals(pls.length, 1);
+}, "Document.plugins should be a live collection");
+</script>