diff --git a/src/telegram/webhook.test.ts b/src/telegram/webhook.test.ts
index 6d4850e4db..9681a8b246 100644
--- a/src/telegram/webhook.test.ts
+++ b/src/telegram/webhook.test.ts
@@ -9,6 +9,7 @@ const handlerSpy = vi.fn(
 );
 const setWebhookSpy = vi.fn();
 const stopSpy = vi.fn();
+const webhookCallbackSpy = vi.fn(() => handlerSpy);
 
 const createTelegramBotSpy = vi.fn(() => ({
   api: { setWebhook: setWebhookSpy },
@@ -17,7 +18,10 @@ const createTelegramBotSpy = vi.fn(() => ({
 
 vi.mock("grammy", async (importOriginal) => {
   const actual = await importOriginal<typeof import("grammy")>();
-  return { ...actual, webhookCallback: () => handlerSpy };
+  return {
+    ...actual,
+    webhookCallback: (...args: unknown[]) => webhookCallbackSpy(...args),
+  };
 });
 
 vi.mock("./bot.js", () => ({
@@ -27,6 +31,7 @@ vi.mock("./bot.js", () => ({
 describe("startTelegramWebhook", () => {
   it("starts server, registers webhook, and serves health", async () => {
     createTelegramBotSpy.mockClear();
+    webhookCallbackSpy.mockClear();
     const abort = new AbortController();
     const cfg = { bindings: [] };
     const { server } = await startTelegramWebhook({
@@ -52,6 +57,19 @@ describe("startTelegramWebhook", () => {
     const health = await fetch(`${url}/healthz`);
     expect(health.status).toBe(200);
     expect(setWebhookSpy).toHaveBeenCalled();
+    expect(webhookCallbackSpy).toHaveBeenCalledWith(
+      expect.objectContaining({
+        api: expect.objectContaining({
+          setWebhook: expect.any(Function),
+        }),
+      }),
+      "http",
+      {
+        secretToken: "secret",
+        onTimeout: "return",
+        timeoutMilliseconds: 10_000,
+      },
+    );
 
     abort.abort();
   });