diff --git a/cli/tests/testdata/run/stdio_streams_are_locked_in_permission_prompt/worker.js b/cli/tests/testdata/run/stdio_streams_are_locked_in_permission_prompt/worker.js
index 1e5a632d33..287027c839 100644
--- a/cli/tests/testdata/run/stdio_streams_are_locked_in_permission_prompt/worker.js
+++ b/cli/tests/testdata/run/stdio_streams_are_locked_in_permission_prompt/worker.js
@@ -1 +1,3 @@
-console.log("Are you sure you want to continue?");
+setTimeout(() => {
+  console.log("Are you sure you want to continue?");
+}, 10); // ensure we don't output too quickly before the permission prompt