2 files changed, 36 insertions, 0 deletions
diff --git a/cli/tests/workers/test.ts b/cli/tests/workers/test.ts
index 0888e01db..f411e434f 100644
--- a/cli/tests/workers/test.ts
+++ b/cli/tests/workers/test.ts
@@ -675,3 +675,24 @@ Deno.test({
     w.terminate();
   },
 });
+
+Deno.test({
+  name: "Worker with top-level-await",
+  fn: async function (): Promise<void> {
+    const result = deferred();
+    const worker = new Worker(
+      new URL("worker_with_top_level_await.ts", import.meta.url).href,
+      { type: "module" },
+    );
+    worker.onmessage = (e): void => {
+      if (e.data == "ready") {
+        worker.postMessage("trigger worker handler");
+      } else if (e.data == "triggered worker handler") {
+        result.resolve();
+      } else {
+        result.reject(new Error("Handler didn't run during top-level delay."));
+      }
+    };
+    await result;
+  },
+});
diff --git a/cli/tests/workers/worker_with_top_level_await.ts b/cli/tests/workers/worker_with_top_level_await.ts
new file mode 100644
index 000000000..6c5528900
--- /dev/null
+++ b/cli/tests/workers/worker_with_top_level_await.ts
@@ -0,0 +1,15 @@
+function delay(ms: number): Promise<void> {
+  return new Promise<void>((resolve) => {
+    setTimeout(() => {
+      resolve();
+    }, ms);
+  });
+}
+
+onmessage = (e: MessageEvent) => {
+  postMessage("triggered worker handler");
+  close();
+};
+postMessage("ready");
+await delay(1000);
+postMessage("never");