diff --git a/eslint-suppressions.json b/eslint-suppressions.json
index a22a88fdc4c..c937c85afaf 100644
--- a/eslint-suppressions.json
+++ b/eslint-suppressions.json
@@ -124,11 +124,6 @@
       "count": 2
     }
   },
-  "packages/announcement-controller/src/AnnouncementController.test.ts": {
-    "@typescript-eslint/explicit-function-return-type": {
-      "count": 1
-    }
-  },
   "packages/approval-controller/src/ApprovalController.test.ts": {
     "@typescript-eslint/explicit-function-return-type": {
       "count": 22
diff --git a/packages/announcement-controller/src/AnnouncementController.test.ts b/packages/announcement-controller/src/AnnouncementController.test.ts
index 11de2cc2089..af387e8b752 100644
--- a/packages/announcement-controller/src/AnnouncementController.test.ts
+++ b/packages/announcement-controller/src/AnnouncementController.test.ts
@@ -7,6 +7,7 @@ import type {
   StateAnnouncementMap,
   AnnouncementControllerActions,
   AnnouncementControllerEvents,
+  AnnouncementControllerMessenger,
   AnnouncementMap,
 } from './AnnouncementController';
 import { AnnouncementController } from './AnnouncementController';
@@ -18,18 +19,13 @@ const name = 'AnnouncementController';
  *
  * @returns A restricted controller messenger.
  */
-function getMessenger() {
+function getMessenger(): AnnouncementControllerMessenger {
   const messenger = new Messenger<
     MockAnyNamespace,
     AnnouncementControllerActions,
     AnnouncementControllerEvents
   >({ namespace: MOCK_ANY_NAMESPACE });
-  return new Messenger<
-    typeof name,
-    AnnouncementControllerActions,
-    AnnouncementControllerEvents,
-    typeof messenger
-  >({
+  return new Messenger({
     namespace: name,
     parent: messenger,
   });