1 files changed, 5 insertions, 0 deletions
diff --git a/tests/testdata/workers/post_undefined.ts b/tests/testdata/workers/post_undefined.ts
new file mode 100644
index 000000000..1b9b8d6ca
--- /dev/null
+++ b/tests/testdata/workers/post_undefined.ts
@@ -0,0 +1,5 @@
+self.onmessage = (ev: MessageEvent) => {
+  console.log("received in worker", ev.data);
+  self.postMessage(undefined);
+  console.log("posted from worker");
+};