diff --git a/src/lib/services/addon-service-test-simple-addon.ts b/src/lib/services/addon-service-test-simple-addon.ts
index dec6136ed649..396843617554 100644
--- a/src/lib/services/addon-service-test-simple-addon.ts
+++ b/src/lib/services/addon-service-test-simple-addon.ts
@@ -75,12 +75,10 @@ export default class SimpleAddon extends Addon {
     }
 
     // eslint-disable-next-line @typescript-eslint/explicit-module-boundary-types
-    async handleEvent(event: IEvent, parameters: any): Promise<string> {
+    async handleEvent(event: IEvent, parameters: any): Promise<void> {
         this.events.push({
             event,
             parameters,
         });
-
-        return 'success';
     }
 }