1 files changed, 9 insertions, 0 deletions
diff --git a/cli/tests/testdata/workers/deno_worker.ts b/cli/tests/testdata/workers/deno_worker.ts
index 2a29c8c4d..a4dca1506 100644
--- a/cli/tests/testdata/workers/deno_worker.ts
+++ b/cli/tests/testdata/workers/deno_worker.ts
@@ -1,7 +1,16 @@
+import { assert } from "../../../../test_util/std/testing/asserts.ts";
+
 onmessage = function (e) {
   if (typeof self.Deno === "undefined") {
     throw new Error("Deno namespace not available in worker");
   }
 
+  assert(!Object.isFrozen(self.Deno));
+
+  const desc = Object.getOwnPropertyDescriptor(self, "Deno");
+  assert(desc);
+  assert(desc.configurable);
+  assert(!desc.writable);
+
   postMessage(e.data);
 };