diff --git a/app/page.js b/app/page.js
index 5c73df6..19a8d65 100644
--- a/app/page.js
+++ b/app/page.js
@@ -5,6 +5,23 @@ export default function Home(props) {
   return (
     <>
     <Layout navState={{ about: true }}>
+      <div>
+        <strong>Async tests</strong>
+        <p>The async checkbox will provide a global function <code>deferred.resolve</code> which the test runner uses to determine that the test has finished.</p>
+        <p>Example usage:</p>
+        <pre>
+{`
+async function main() {
+  //your code here
+}
+
+(async function start(){
+  await main();
+  deferred.resolve();
+})()
+`}
+        </pre>
+      </div>
       <h1 className="font-semibold py-2">Create a test case</h1>
       <EditForm />
     </Layout>