diff --git a/tests/backend/rename.test.js b/tests/backend/rename.test.js
new file mode 100644
index 0000000..1bc5225
--- /dev/null
+++ b/tests/backend/rename.test.js
@@ -0,0 +1,42 @@
+// 文件重命名 API 测试
+const request = require('supertest');
+const app = require('../../backend/src/index');
+
+describe('Rename API', () => {
+  let token;
+
+  beforeAll(async () => {
+    const loginRes = await request(app)
+      .post('/api/auth/login')
+      .send({ username: 'testuser', password: 'test123' });
+    token = loginRes.body.token;
+  });
+
+  describe('PUT /api/rename/:id', () => {
+    it('should rename file', async () => {
+      const response = await request(app)
+        .put('/api/rename/1')
+        .set('Authorization', `Bearer ${token}`)
+        .send({ name: 'new-filename.pdf' });
+      
+      expect([200, 404]).toContain(response.status);
+    });
+
+    it('should reject empty name', async () => {
+      const response = await request(app)
+        .put('/api/rename/1')
+        .set('Authorization', `Bearer ${token}`)
+        .send({ name: '' });
+      
+      expect(response.status).toBe(400);
+    });
+
+    it('should reject without token', async () => {
+      const response = await request(app)
+        .put('/api/rename/1')
+        .send({ name: 'test.pdf' });
+      
+      expect(response.status).toBe(401);
+    });
+  });
+});