diff --git a/trusted-types/Document-write-exception-order.xhtml b/trusted-types/Document-write-exception-order.xhtml
new file mode 100644
index 00000000000000..db7c0631243477
--- /dev/null
+++ b/trusted-types/Document-write-exception-order.xhtml
@@ -0,0 +1,42 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml">
+<head>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+  <script src="support/helper.sub.js"></script>
+
+  <meta http-equiv="Content-Security-Policy" content="require-trusted-types-for 'script';" />
+</head>
+<body>
+<script>
+  test(t => {
+    const old = document.body.innerText;
+    assert_throws_js(TypeError, _ => {
+      document.write('A string');
+    });
+    assert_equals(document.body.innerText, old);
+  }, "`document.write(string)` throws TypeError");
+
+  let p = createHTML_policy(window, 1);
+  test(t => {
+    const old = document.body.innerText;
+    assert_throws_dom("InvalidStateError", _ => {
+      document.write(p.createHTML('A string'));
+    });
+    assert_equals(document.body.innerText, old);
+  }, "`document.write(TrustedHTML)` throws InvalidStateError");
+
+  let default_policy = trustedTypes.createPolicy('default',
+      { createHTML: createHTMLJS }, true );
+
+  test(t => {
+    const old = document.body.innerText;
+    assert_throws_dom("InvalidStateError", _ => {
+      document.write('A string');
+    });
+    assert_equals(document.body.innerText, old);
+  }, "`document.write(string)` w/ default policy throws InvalidStateError");
+</script>
+</body>
+</html>
\ No newline at end of file
diff --git a/trusted-types/block-string-assignment-to-Element-insertAdjacentHTML.html b/trusted-types/block-string-assignment-to-Element-insertAdjacentHTML.html
index 228887d0423d31..e4fec3a8a70dbf 100644
--- a/trusted-types/block-string-assignment-to-Element-insertAdjacentHTML.html
+++ b/trusted-types/block-string-assignment-to-Element-insertAdjacentHTML.html
@@ -40,6 +40,24 @@
       container.firstChild.remove();
   }, "insertAdjacentHTML with html assigned via policy (successful HTML transformation).");
 
+  test(t => {
+    let p = createHTML_policy(window, 1);
+    var d = document.createElement('div');
+    container.appendChild(d);
+
+    assert_throws_dom("SyntaxError", _ => {
+      d.insertAdjacentHTML('invalid', p.createHTML("<p>Fail</p>"));
+    });
+
+    assert_equals(d.previousSibling, null);
+    assert_equals(d.firstChild, null);
+    assert_equals(d.lastChild, null);
+    assert_equals(d.nextSibling, null);
+
+    while (container.firstChild)
+      container.firstChild.remove();
+  }, "insertAdjacentHTML(TrustedHTML) throws SyntaxError DOMException when position invalid.");
+
   // String assignments throw.
   test(t => {
     var d = document.createElement('div');
@@ -67,6 +85,23 @@
       container.firstChild.remove();
   }, "`insertAdjacentHTML(string)` throws.");
 
+  test(t => {
+    var d = document.createElement('div');
+    container.appendChild(d);
+
+    assert_throws_js(TypeError, _ => {
+      d.insertAdjacentHTML('invalid', "<p>Fail</p>");
+    });
+
+    assert_equals(d.previousSibling, null);
+    assert_equals(d.firstChild, null);
+    assert_equals(d.lastChild, null);
+    assert_equals(d.nextSibling, null);
+
+    while (container.firstChild)
+      container.firstChild.remove();
+  }, "`insertAdjacentHTML(string)` still throws TypeError when position invalid.");
+
   // Null assignment throws.
   test(t => {
     var d = document.createElement('div');
diff --git a/trusted-types/block-string-assignment-to-Element-outerHTML.html b/trusted-types/block-string-assignment-to-Element-outerHTML.html
index 9b6cf72cb4017c..acf5a42622ca9d 100644
--- a/trusted-types/block-string-assignment-to-Element-outerHTML.html
+++ b/trusted-types/block-string-assignment-to-Element-outerHTML.html
@@ -26,6 +26,13 @@
       container.firstChild.remove();
   }, "outerHTML with html assigned via policy (successful HTML transformation).");
 
+  test(t => {
+    let p = createHTML_policy(window, 1);
+    assert_throws_dom("NoModificationAllowedError", _ => {
+      document.documentElement.outerHTML = p.createHTML('<p>Content</p>');
+    });
+  }, "`outerHTML = TrustedHTML` throws NoModificationAllowedError when parent is a document.");
+
   // String assignments throw.
   test(t => {
     var d = document.createElement('div');
@@ -38,6 +45,12 @@
       container.firstChild.remove();
   }, "`outerHTML = string` throws.");
 
+  test(t => {
+    assert_throws_js(TypeError, _ => {
+      document.documentElement.outerHTML = '<p>Content</p>';
+    });
+  }, "`outerHTML = string` throws TypeError even when parent is a document.");
+
   // Null assignment throws.
   test(t => {
     var d = document.createElement('div');
