diff --git a/trusted-types/GlobalEventHandlers-onclick.html b/trusted-types/GlobalEventHandlers-onclick.html
index 0fdde778cc8863..83b957256bee93 100644
--- a/trusted-types/GlobalEventHandlers-onclick.html
+++ b/trusted-types/GlobalEventHandlers-onclick.html
@@ -19,74 +19,29 @@
   el.setAttribute('onclick', script);
   container.appendChild(el);
   el.click();
-}, "a.setAttribte('onclick') sets a trusted script.");
+}, "a.setAttribute('onclick') sets a trusted script.");
 
 // Unsuitable TrustedType assignments do throw.
-async_test(t => {
+test(t => {
   window.onclickFail1 = t.unreached_func();
   let script = policy_html.createHTML("window.onclickFail1();");
   let el = document.createElement('a');
-  try {
+  assert_throws_js(TypeError, () => {
     el.setAttribute('onclick', script);
     container.appendChild(el);
     el.click();
-  } catch (e) {
-    t.done();
-  }
-  assert_unreached();
+  });
 }, "a.setAttribute('onclick') sets an unsuitable trusted type.");
 
 // So do plain test assignments.
-async_test(t => {
+test(t => {
   window.onclickFail2 = t.unreached_func();
   let el = document.createElement('a');
-  try {
+  assert_throws_js(TypeError, () => {
     el.setAttribute("onclick", "window.onclickFail2();");
     container.appendChild(el);
     el.click();
-  } catch (e) {
-    t.done();
-  }
-  assert_unreached();
+  });
 }, "a.setAttribute('click') sets a test string.");
-/*
-// Trusted Type assignments via property access does not throw.
-async_test(t => {
-  window.onclickDone2 = t.step_func_done();
-  let script = policy.createScript("window.onclickDone2();");
-  let el = document.createElement('a');
-  el.onclick = script;
-  container.appendChild(el);
-  el.click();
-}, "a.onclick assigned via policy (successful Script transformation).");
 
-// Unsuitable TrustedType assignments do throw.
-async_test(t => {
-  window.onclickFail3 = t.unreached_func();
-  let script = policy_html.createHTML("window.onclickFail3();");
-  let el = document.createElement('a');
-  try {
-    el.onclick = script;
-    container.appendChild(el);
-    el.click();
-  } catch (e) {
-    t.done();
-  }
-  assert_unreached();
-}, "a.onclick assigned via an unsuitable policy.");
-
-// So do plain test assignments.
-async_test(t => {
-  window.onclickFail4 = t.unreached_func();
-  let el = document.createElement('a');
-  try {
-    el.onclick = window.onclickFail4();
-    container.appendChild(el);
-    el.click();
-  } catch (e) {
-    t.done();
-  }
-  assert_unreached();
-}, "a.onclick assigned a test string.");
-*/
 </script>