diff --git a/packages/core/src/libraries/hook.test.ts b/packages/core/src/libraries/hook.test.ts
index 5657e87a7d89..443632f3d15e 100644
--- a/packages/core/src/libraries/hook.test.ts
+++ b/packages/core/src/libraries/hook.test.ts
@@ -6,7 +6,7 @@ import { got } from 'got';
 import type { Interaction } from './hook.js';
 
 const { jest } = import.meta;
-const { mockEsmWithActual } = createMockUtils(jest);
+const { mockEsmWithActual, mockEsm } = createMockUtils(jest);
 
 const nanoIdMock = 'mockId';
 await mockEsmWithActual('@logto/shared', () => ({
@@ -15,6 +15,11 @@ await mockEsmWithActual('@logto/shared', () => ({
   generateStandardId: () => nanoIdMock,
 }));
 
+const mockSignature = 'mockSignature';
+mockEsm('#src/utils/signature.js', () => ({
+  generateSignature: () => mockSignature,
+}));
+
 const { MockQueries } = await import('#src/test-utils/tenant.js');
 
 const url = 'https://logto.gg';
@@ -78,7 +83,11 @@ describe('triggerInteractionHooksIfNeeded()', () => {
 
     expect(findAllHooks).toHaveBeenCalled();
     expect(post).toHaveBeenCalledWith(url, {
-      headers: { 'user-agent': 'Logto (https://logto.io)', bar: 'baz' },
+      headers: {
+        'user-agent': 'Logto (https://logto.io)',
+        bar: 'baz',
+        'x-logto-signature-256': mockSignature,
+      },
       json: {
         hookId: 'foo',
         event: 'PostSignIn',