diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 3585af6..16b4892 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -30,8 +30,7 @@ jobs:
 
       - name: Run tests (if any)
         run: |
-          # Add your test commands here
-          # For example: python -m unittest discover tests
+          python -m unittest discover tests
 
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v3
diff --git a/tests/test_guard.py b/tests/test_guard.py
new file mode 100644
index 0000000..6525b5e
--- /dev/null
+++ b/tests/test_guard.py
@@ -0,0 +1,32 @@
+import unittest
+from unittest.mock import AsyncMock, patch
+from guard import process_message, command_handler
+
+class TestGuard(unittest.TestCase):
+    @patch('guard.link_filter')
+    async def test_process_message(self, mock_link_filter):
+        mock_link_filter.should_filter.return_value = (True, [])
+        event = AsyncMock()
+        event.is_private = False
+        event.sender_id = 12345  # 非管理员ID
+
+        await process_message(event, AsyncMock())
+
+        event.delete.assert_called_once()
+        event.respond.assert_called_once_with("已撤回该消息。注:包含关键词或重复发送的非白名单链接会被自动撤回。")
+
+    @patch('guard.handle_command')
+    @patch('guard.link_filter')
+    async def test_command_handler(self, mock_link_filter, mock_handle_command):
+        event = AsyncMock()
+        event.is_private = True
+        event.sender_id = int(os.environ.get('ADMIN_ID'))
+        event.raw_text = '/add keyword'
+
+        await command_handler(event, mock_link_filter)
+
+        mock_handle_command.assert_called_once()
+        mock_link_filter.load_data_from_file.assert_called_once()
+
+if __name__ == '__main__':
+    unittest.main()
diff --git a/tests/test_link_filter.py b/tests/test_link_filter.py
new file mode 100644
index 0000000..3a66233
--- /dev/null
+++ b/tests/test_link_filter.py
@@ -0,0 +1,45 @@
+import unittest
+import tempfile
+import json
+from link_filter import LinkFilter
+
+class TestLinkFilter(unittest.TestCase):
+    def setUp(self):
+        # 创建临时文件作为关键词和白名单文件
+        self.keywords_file = tempfile.NamedTemporaryFile(mode='w+', delete=False)
+        self.whitelist_file = tempfile.NamedTemporaryFile(mode='w+', delete=False)
+        
+        # 写入一些初始数据
+        json.dump(['example.com'], self.keywords_file)
+        json.dump(['google.com'], self.whitelist_file)
+        
+        self.keywords_file.close()
+        self.whitelist_file.close()
+        
+        self.link_filter = LinkFilter(self.keywords_file.name, self.whitelist_file.name)
+
+    def test_normalize_link(self):
+        self.assertEqual(self.link_filter.normalize_link('https://www.example.com'), 'www.example.com')
+        self.assertEqual(self.link_filter.normalize_link('http://example.com'), 'example.com')
+
+    def test_is_whitelisted(self):
+        self.assertTrue(self.link_filter.is_whitelisted('https://www.google.com'))
+        self.assertFalse(self.link_filter.is_whitelisted('https://www.example.com'))
+
+    def test_should_filter(self):
+        should_filter, new_links = self.link_filter.should_filter('Check out https://www.example.com')
+        self.assertTrue(should_filter)
+        self.assertEqual(new_links, [])
+
+        should_filter, new_links = self.link_filter.should_filter('Check out https://www.newsite.com')
+        self.assertFalse(should_filter)
+        self.assertEqual(new_links, ['www.newsite.com'])
+
+    def tearDown(self):
+        # 删除临时文件
+        import os
+        os.unlink(self.keywords_file.name)
+        os.unlink(self.whitelist_file.name)
+
+if __name__ == '__main__':
+    unittest.main()