diff --git a/packages/backend/test-federation/test/utils.ts b/packages/backend/test-federation/test/utils.ts
index 483bf4b254..093277cdb4 100644
--- a/packages/backend/test-federation/test/utils.ts
+++ b/packages/backend/test-federation/test/utils.ts
@@ -232,7 +232,6 @@ export async function isFired<C extends keyof Misskey.Channels, T extends keyof
 	params?: Misskey.Channels[C]['params'],
 ): Promise<boolean> {
 	return new Promise<boolean>(async (resolve, reject) => {
-		// @ts-expect-error TODO: why?
 		const stream = new Misskey.Stream(`wss://${host}`, { token: user.i }, { WebSocket });
 		const connection = stream.useChannel(channel, params);
 		connection.on(type as any, ((msg: any) => {
@@ -266,7 +265,6 @@ export async function isNoteUpdatedEventFired(
 	cond: (msg: Parameters<Misskey.StreamEvents['noteUpdated']>[0]) => boolean,
 ): Promise<boolean> {
 	return new Promise<boolean>(async (resolve, reject) => {
-		// @ts-expect-error TODO: why?
 		const stream = new Misskey.Stream(`wss://${host}`, { token: user.i }, { WebSocket });
 		stream.send('s', { id: noteId });
 		stream.on('noteUpdated', msg => {