diff --git a/packages/backend/test/e2e/streaming.ts b/packages/backend/test/e2e/streaming.ts
index af905b4c91..38a826c4d3 100644
--- a/packages/backend/test/e2e/streaming.ts
+++ b/packages/backend/test/e2e/streaming.ts
@@ -172,7 +172,7 @@ describe('Streaming', () => {
 				const fired = await waitFire(
 					ayano, 'homeTimeline', // ayano:home
 					() => api('notes/create', { text: 'bar', visibility: 'followers', replyId: note.id }, kyoko),	// kyoko posts
-					msg => msg.type === 'note' && msg.body.userId === kyoko.id && msg.body.reply.text === 'foo',
+					msg => msg.type === 'note' && msg.body.userId === kyoko.id && msg.body.reply?.text === 'foo',
 				);
 
 				assert.strictEqual(fired, true);