diff --git a/packages/backend/test-federation/test/timeline.test.ts b/packages/backend/test-federation/test/timeline.test.ts
index 2250bf4a42..843a9584a5 100644
--- a/packages/backend/test-federation/test/timeline.test.ts
+++ b/packages/backend/test-federation/test/timeline.test.ts
@@ -49,7 +49,7 @@ describe('Timeline', () => {
 			async () => {
 				note = (await alice.client.request('notes/create', { text, ...noteParams })).createdNote;
 			},
-			'note', msg => msg.text === text,
+			'note', msg => (msg as Misskey.entities.Note).text === text,
 			channelParams,
 		);
 		strictEqual(streamingFired, expect);