diff --git a/extensions/telegram/src/webhook.test.ts b/extensions/telegram/src/webhook.test.ts
index 549e73f9ba3..6bf495a76bd 100644
--- a/extensions/telegram/src/webhook.test.ts
+++ b/extensions/telegram/src/webhook.test.ts
@@ -73,6 +73,10 @@ vi.mock("grammy", async (importOriginal) => {
   const actual = await importOriginal<typeof import("grammy")>();
   return {
     ...actual,
+    API_CONSTANTS: actual.API_CONSTANTS ?? {
+      DEFAULT_UPDATE_TYPES: ["message"],
+      ALL_UPDATE_TYPES: ["message"],
+    },
     webhookCallback: webhookCallbackSpy,
   };
 });