....

frontend/test-support/event-delivery.test.ts

@@ -68,11 +68,11 @@ for (const [count, delivery] of [
                 }
             };
             const config = {
-                initialize: async () => {
+                getConfig: async () => {
                     initializing.resolve();
                     await initialized.promise;
+                    return { mergeableFileExtensions: ["md"] };
                 },
-                getConfig: async () => ({ mergeableFileExtensions: ["md"] }),
                 reset: () => {}
             } as unknown as ServerConfig;
             const events: EventRecord[] = Array.from(