diff --git a/api/tests/unit_tests/oss/__mock/tencent_cos.py b/api/tests/unit_tests/oss/__mock/tencent_cos.py
new file mode 100644
index 0000000000..5189b68e87
--- /dev/null
+++ b/api/tests/unit_tests/oss/__mock/tencent_cos.py
@@ -0,0 +1,81 @@
+import os
+from unittest.mock import MagicMock
+
+import pytest
+from _pytest.monkeypatch import MonkeyPatch
+from qcloud_cos import CosS3Client
+from qcloud_cos.streambody import StreamBody
+
+from tests.unit_tests.oss.__mock.base import (
+    get_example_bucket,
+    get_example_data,
+    get_example_filename,
+    get_example_filepath,
+)
+
+
+class MockTencentCosClass:
+    def __init__(self, conf, retry=1, session=None):
+        self.bucket_name = get_example_bucket()
+        self.key = get_example_filename()
+        self.content = get_example_data()
+        self.filepath = get_example_filepath()
+        self.resp = {
+            "ETag": "ee8de918d05640145b18f70f4c3aa602",
+            "Server": "tencent-cos",
+            "x-cos-hash-crc64ecma": 16749565679157681890,
+            "x-cos-request-id": "NWU5MDNkYzlfNjRiODJhMDlfMzFmYzhfMTFm****",
+        }
+
+    def put_object(self, Bucket, Body, Key, EnableMD5=False, **kwargs):  # noqa: N803
+        assert Bucket == self.bucket_name
+        assert Key == self.key
+        assert Body == self.content
+        return self.resp
+
+    def get_object(self, Bucket, Key, KeySimplifyCheck=True, **kwargs):  # noqa: N803
+        assert Bucket == self.bucket_name
+        assert Key == self.key
+
+        mock_stream_body = MagicMock(StreamBody)
+        mock_raw_stream = MagicMock()
+        mock_stream_body.get_raw_stream.return_value = mock_raw_stream
+        mock_raw_stream.read.return_value = self.content
+
+        mock_stream_body.get_stream_to_file = MagicMock()
+
+        def chunk_generator(chunk_size=2):
+            for i in range(0, len(self.content), chunk_size):
+                yield self.content[i : i + chunk_size]
+
+        mock_stream_body.get_stream.return_value = chunk_generator(chunk_size=4096)
+        return {"Body": mock_stream_body}
+
+    def object_exists(self, Bucket, Key):  # noqa: N803
+        assert Bucket == self.bucket_name
+        assert Key == self.key
+        return True
+
+    def delete_object(self, Bucket, Key, **kwargs):  # noqa: N803
+        assert Bucket == self.bucket_name
+        assert Key == self.key
+        self.resp.update({"x-cos-delete-marker": True})
+        return self.resp
+
+
+MOCK = os.getenv("MOCK_SWITCH", "false").lower() == "true"
+
+
+@pytest.fixture
+def setup_tencent_cos_mock(monkeypatch: MonkeyPatch):
+    if MOCK:
+        monkeypatch.setattr(CosS3Client, "__init__", MockTencentCosClass.__init__)
+        monkeypatch.setattr(CosS3Client, "put_object", MockTencentCosClass.put_object)
+        monkeypatch.setattr(CosS3Client, "get_object", MockTencentCosClass.get_object)
+        monkeypatch.setattr(CosS3Client, "object_exists", MockTencentCosClass.object_exists)
+        monkeypatch.setattr(CosS3Client, "delete_object", MockTencentCosClass.delete_object)
+
+    yield
+
+    if MOCK:
+        monkeypatch.undo()
diff --git a/api/tests/unit_tests/oss/tencent_cos/__init__.py b/api/tests/unit_tests/oss/tencent_cos/__init__.py
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/api/tests/unit_tests/oss/tencent_cos/test_tencent_cos.py b/api/tests/unit_tests/oss/tencent_cos/test_tencent_cos.py
new file mode 100644
index 0000000000..303f0493bd
--- /dev/null
+++ b/api/tests/unit_tests/oss/tencent_cos/test_tencent_cos.py
@@ -0,0 +1,20 @@
+from unittest.mock import patch
+
+import pytest
+from qcloud_cos import CosConfig
+
+from extensions.storage.tencent_cos_storage import TencentCosStorage
+from tests.unit_tests.oss.__mock.base import (
+    BaseStorageTest,
+    get_example_bucket,
+)
+from tests.unit_tests.oss.__mock.tencent_cos import setup_tencent_cos_mock
+
+
+class TestTencentCos(BaseStorageTest):
+    @pytest.fixture(autouse=True)
+    def setup_method(self, setup_tencent_cos_mock):
+        """Executed before each test method."""
+        with patch.object(CosConfig, "__init__", return_value=None):
+            self.storage = TencentCosStorage()
+        self.storage.bucket_name = get_example_bucket()
diff --git a/api/tests/unit_tests/oss/volcengine_tos/test_volcengine_tos.py b/api/tests/unit_tests/oss/volcengine_tos/test_volcengine_tos.py
index 9f8aa158a9..5afbc9e8b4 100644
--- a/api/tests/unit_tests/oss/volcengine_tos/test_volcengine_tos.py
+++ b/api/tests/unit_tests/oss/volcengine_tos/test_volcengine_tos.py
@@ -1,5 +1,3 @@
-from collections.abc import Generator
-
 import pytest
 from tos import TosClientV2