diff --git a/packages/backend/src/models/user.test.js b/packages/backend/src/models/user.test.js
index befbd90b..27432d85 100644
--- a/packages/backend/src/models/user.test.js
+++ b/packages/backend/src/models/user.test.js
@@ -1,4 +1,5 @@
 import { describe, it, expect, vi } from 'vitest';
+import appConfig from '../config/app.js';
 import Base from './base.js';
 import AccessToken from './access-token.js';
 import Connection from './connection.js';
@@ -185,4 +186,17 @@ describe('User model', () => {
 
     expect(virtualAttributes).toStrictEqual(expectedAttributes);
   });
+
+  it('acceptInvitationUrl should return accept invitation page URL with invitation token', async () => {
+    const user = new User();
+    user.invitationToken = 'invitation-token';
+
+    vi.spyOn(appConfig, 'webAppUrl', 'get').mockReturnValue(
+      'https://automatisch.io'
+    );
+
+    expect(user.acceptInvitationUrl).toBe(
+      'https://automatisch.io/accept-invitation?token=invitation-token'
+    );
+  });
 });