diff --git a/tests/auth-worker.test.ts b/tests/auth-worker.test.ts
index ea5aa86..a1d22d7 100644
--- a/tests/auth-worker.test.ts
+++ b/tests/auth-worker.test.ts
@@ -36,6 +36,11 @@ describe("cfw-auth worker", () => {
     expect(response.status).toBe(404);
   });
 
+  it("does not expose a custom Autumn sync endpoint", async () => {
+    const response = await worker.fetch(new Request("http://auth.local/internal/autumn/sync"), env);
+    expect(response.status).toBe(404);
+  });
+
   it("exposes Better Auth OpenAPI reference", async () => {
     const response = await worker.fetch(new Request("http://auth.local/api/auth/reference"), env);
     expect(response.status).toBe(200);