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diff --git a/testing/web-platform/tests/html/syntax/parsing-html-fragments/tokenizer-modes-001.html b/testing/web-platform/tests/html/syntax/parsing-html-fragments/tokenizer-modes-001.html
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+++ b/testing/web-platform/tests/html/syntax/parsing-html-fragments/tokenizer-modes-001.html
@@ -0,0 +1,85 @@
+<!DOCTYPE html>
+<html lang="en" >
+<head>
+  <title>Tokenizer states</title>
+<link rel='author' title='Henri Sivonen' href='mailto:hsivonen@hsivonen.fi'>
+<link rel='help' href='https://html.spec.whatwg.org/#html-fragment-parsing-algorithm'>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+</head>
+<body>
+<script>
+test(function() {
+  var e = document.createElement("title");
+  e.innerHTML = "</title><div>";
+  assert_equals(e.getElementsByTagName("div").length, 0);
+  assert_equals(e.innerHTML, "&lt;/title&gt;&lt;div&gt;");
+}, "</title> should not break out of title.");
+
+test(function() {
+  var e = document.createElement("textarea");
+  e.innerHTML = "</textarea><div>";
+  assert_equals(e.getElementsByTagName("div").length, 0);
+  assert_equals(e.innerHTML, "&lt;/textarea&gt;&lt;div&gt;");
+}, "</textarea> should not break out of textarea.");
+
+test(function() {
+  var e = document.createElement("style");
+  e.innerHTML = "</style><div>";
+  assert_equals(e.getElementsByTagName("div").length, 0);
+  assert_equals(e.innerHTML, "</style><div>");
+}, "</style> should not break out of style.");
+
+test(function() {
+  var e = document.createElement("xmp");
+  e.innerHTML = "</xmp><div>";
+  assert_equals(e.getElementsByTagName("div").length, 0);
+  assert_equals(e.innerHTML, "</xmp><div>");
+}, "</xmp> should not break out of xmp.");
+
+test(function() {
+  var e = document.createElement("iframe");
+  e.innerHTML = "</iframe><div>";
+  assert_equals(e.getElementsByTagName("div").length, 0);
+  assert_equals(e.innerHTML, "</iframe><div>");
+}, "</iframe> should not break out of iframe.");
+
+test(function() {
+  var e = document.createElement("noembed");
+  e.innerHTML = "</noembed><div>";
+  assert_equals(e.getElementsByTagName("div").length, 0);
+  assert_equals(e.innerHTML, "</noembed><div>");
+}, "</noembed> should not break out of noembed.");
+
+test(function() {
+  var e = document.createElement("noframes");
+  e.innerHTML = "</noframes><div>";
+  assert_equals(e.getElementsByTagName("div").length, 0);
+  assert_equals(e.innerHTML, "</noframes><div>");
+}, "</noframes> should not break out of noframes.");
+
+test(function() {
+  var e = document.createElement("script");
+  e.innerHTML = "<\/script><div>";
+  assert_equals(e.getElementsByTagName("div").length, 0);
+  assert_equals(e.innerHTML, "<\/script><div>");
+}, "<\/script> should not break out of script.");
+
+
+test(function() {
+  var e = document.createElement("noscript");
+  e.innerHTML = "</noscript><div>";
+  assert_equals(e.getElementsByTagName("div").length, 0);
+  assert_equals(e.innerHTML, "</noscript><div>");
+}, "</noscript> should not break out of noscript.");
+
+test(function() {
+  var e = document.createElement("plaintext");
+  e.innerHTML = "</plaintext><div>";
+  assert_equals(e.getElementsByTagName("div").length, 0);
+  assert_equals(e.innerHTML, "</plaintext><div>");
+}, "</plaintext> should not break out of plaintext.");
+
+</script>
+</body>
+</html>