1 files changed, 12 insertions, 0 deletions
diff --git a/dom/workers/test/file_use_counter_shared_worker_microtask.js b/dom/workers/test/file_use_counter_shared_worker_microtask.js
new file mode 100644
index 0000000000..b219da2225
--- /dev/null
+++ b/dom/workers/test/file_use_counter_shared_worker_microtask.js
@@ -0,0 +1,12 @@
+onconnect = function (e) {
+  let port = e.ports[0];
+  port.onmessage = function (m) {
+    if (m.data === "RUN") {
+      queueMicrotask(() => {
+        console.log("worker runs");
+      });
+      port.postMessage("DONE");
+      close();
+    }
+  };
+};