diff --git a/nodejs/tests/api_conf.proxy.test.js b/nodejs/tests/api_conf.proxy.test.js
new file mode 100644
index 0000000..a29b750
--- /dev/null
+++ b/nodejs/tests/api_conf.proxy.test.js
@@ -0,0 +1,69 @@
+const request = require('supertest');
+const express = require('express');
+
+// Mock dependencies before requiring the route
+jest.mock('@simpleworkjs/bao-conf', () => ({
+  get: jest.fn(),
+  set: jest.fn(),
+}));
+jest.mock('../utils/permission', () => ({
+  byGroup: jest.fn().mockResolvedValue(true),
+}));
+jest.mock('@simpleworkjs/conf', () => ({}));
+
+const baoConf = require('@simpleworkjs/bao-conf');
+const apiConf = require('../routes/api_conf');
+
+const app = express();
+app.use(express.json());
+// Add a mock user for the permission check
+app.use((req, res, next) => {
+  req.user = { uid: 'testadmin' };
+  next();
+});
+app.use('/api/conf', apiConf);
+
+describe('Proxy Conf API (Vault Integration)', () => {
+  beforeEach(() => {
+    jest.clearAllMocks();
+  });
+
+  it('GET /api/conf/proxy returns proxy conf with masked secrets', async () => {
+    baoConf.get.mockResolvedValueOnce({
+      oidc: { issuer: 'https://test', clientId: 'cid', clientSecret: 'real_secret' },
+      ldap: { bindPassword: 'real_ldap_password' }
+    });
+
+    const res = await request(app).get('/api/conf/proxy');
+    
+    expect(res.status).toBe(200);
+    expect(res.body.oidc.issuer).toBe('https://test');
+    expect(res.body.oidc.clientSecret).toBe('********'); // MASKED
+    expect(res.body.ldap.bindPassword).toBe('********'); // MASKED
+    expect(baoConf.get).toHaveBeenCalledWith('proxy/conf');
+  });
+
+  it('POST /api/conf/proxy merges configuration securely to OpenBao', async () => {
+    baoConf.get.mockResolvedValueOnce({
+      oidc: { clientSecret: 'old_secret' },
+      ldap: { bindPassword: 'old_ldap' }
+    });
+
+    const payload = {
+      oidc: { issuer: 'https://new', clientSecret: '********' }, // Admin left it unchanged
+      ldap: { bindPassword: 'new_password' }
+    };
+
+    const res = await request(app)
+      .post('/api/conf/proxy')
+      .send(payload);
+
+    expect(res.status).toBe(200);
+    expect(baoConf.set).toHaveBeenCalledTimes(1);
+    const saved = baoConf.set.mock.calls[0][1];
+
+    expect(saved.oidc.issuer).toBe('https://new');
+    expect(saved.oidc.clientSecret).toBe('old_secret'); // Preserved because incoming was mask
+    expect(saved.ldap.bindPassword).toBe('new_password'); // Overwritten because incoming was new
+  });
+});