diff --git a/extensions/telegram/src/bot-message-dispatch.test.ts b/extensions/telegram/src/bot-message-dispatch.test.ts
index 31b361710ff0..83ac79ebd92e 100644
--- a/extensions/telegram/src/bot-message-dispatch.test.ts
+++ b/extensions/telegram/src/bot-message-dispatch.test.ts
@@ -52,7 +52,9 @@ const createChannelMessageReplyPipeline = vi.hoisted(() =>
   })),
 );
 const wasSentByBot = vi.hoisted(() => vi.fn(() => false));
-const appendSessionTranscriptMessage = vi.hoisted(() => vi.fn(async () => ({ messageId: "m1" })));
+const appendSessionTranscriptMessage = vi.hoisted(() =>
+  vi.fn(async (_params: { message?: unknown }) => ({ messageId: "m1" })),
+);
 const emitSessionTranscriptUpdate = vi.hoisted(() => vi.fn());
 const loadSessionStore = vi.hoisted(() => vi.fn());
 const resolveStorePath = vi.hoisted(() => vi.fn(() => "/tmp/sessions.json"));