diff --git a/components/script/dom/dedicatedworkerglobalscope.rs b/components/script/dom/dedicatedworkerglobalscope.rs
index 567d4fa6861a..ad0e7445f0f5 100644
--- a/components/script/dom/dedicatedworkerglobalscope.rs
+++ b/components/script/dom/dedicatedworkerglobalscope.rs
@@ -538,9 +538,8 @@ impl DedicatedWorkerGlobalScope {
         let worker = self.worker.borrow().as_ref().unwrap().clone();
         let global_scope = self.upcast::<GlobalScope>();
         let pipeline_id = global_scope.pipeline_id();
-        let origin = global_scope.origin().immutable().ascii_serialization();
         let task = Box::new(task!(post_worker_message: move || {
-            Worker::handle_message(worker, origin, data);
+            Worker::handle_message(worker, data);
         }));
         self.parent_sender
             .send(CommonScriptMsg::Task(
diff --git a/components/script/dom/worker.rs b/components/script/dom/worker.rs
index 2d126933849d..7eb958cd095f 100644
--- a/components/script/dom/worker.rs
+++ b/components/script/dom/worker.rs
@@ -140,11 +140,7 @@ impl Worker {
         self.terminated.get()
     }
 
-    pub fn handle_message(
-        address: TrustedWorkerAddress,
-        origin: String,
-        data: StructuredSerializedData,
-    ) {
+    pub fn handle_message(address: TrustedWorkerAddress, data: StructuredSerializedData) {
         let worker = address.root();
 
         if worker.is_terminated() {
@@ -156,14 +152,7 @@ impl Worker {
         let _ac = enter_realm(target);
         rooted!(in(*global.get_cx()) let mut message = UndefinedValue());
         if let Ok(ports) = structuredclone::read(&global, data, message.handle_mut()) {
-            MessageEvent::dispatch_jsval(
-                target,
-                &global,
-                message.handle(),
-                Some(&origin),
-                None,
-                ports,
-            );
+            MessageEvent::dispatch_jsval(target, &global, message.handle(), None, None, ports);
         } else {
             // Step 4 of the "port post message steps" of the implicit messageport, fire messageerror.
             MessageEvent::dispatch_error(target, &global);
diff --git a/tests/wpt/metadata/workers/interfaces/DedicatedWorkerGlobalScope/postMessage/message-event.html.ini b/tests/wpt/metadata/workers/interfaces/DedicatedWorkerGlobalScope/postMessage/message-event.html.ini
deleted file mode 100644
index c810dcf32ede..000000000000
--- a/tests/wpt/metadata/workers/interfaces/DedicatedWorkerGlobalScope/postMessage/message-event.html.ini
+++ /dev/null
@@ -1,5 +0,0 @@
-[message-event.html]
-  type: testharness
-  [Properties of the 'message' event]
-    expected: FAIL
-