diff --git a/python/aibrix/tests/downloader/test_downloader_tos.py b/python/aibrix/tests/downloader/test_downloader_tos.py
index d6792e7b..5398f70b 100644
--- a/python/aibrix/tests/downloader/test_downloader_tos.py
+++ b/python/aibrix/tests/downloader/test_downloader_tos.py
@@ -17,10 +17,10 @@
 import pytest
 
 from aibrix.downloader.base import get_downloader
-from aibrix.downloader.s3 import TOSDownloader
+from aibrix.downloader.tos import TOSDownloaderV2
 
 S3_BOTO3_MODULE = "aibrix.downloader.s3.boto3"
-ENVS_MODULE = "aibrix.downloader.s3.envs"
+ENVS_MODULE = "aibrix.downloader.tos.envs"
 
 
 def mock_not_exsit_tos(mock_boto3):
@@ -37,6 +37,7 @@ def mock_exsit_tos(mock_boto3):
 
 env_group = mock.Mock()
 env_group.DOWNLOADER_NUM_THREADS = 4
+env_group.DOWNLOADER_TOS_VERSION = "v2"
 
 
 @mock.patch(ENVS_MODULE, env_group)
@@ -45,7 +46,7 @@ def test_get_downloader_tos(mock_boto3):
     mock_exsit_tos(mock_boto3)
 
     downloader = get_downloader("tos://bucket/path")
-    assert isinstance(downloader, TOSDownloader)
+    assert isinstance(downloader, TOSDownloaderV2)
 
 
 @mock.patch(ENVS_MODULE, env_group)
diff --git a/python/aibrix/tests/downloader/test_downloader_tos_v1.py b/python/aibrix/tests/downloader/test_downloader_tos_v1.py
new file mode 100644
index 00000000..b3e5fe27
--- /dev/null
+++ b/python/aibrix/tests/downloader/test_downloader_tos_v1.py
@@ -0,0 +1,81 @@
+# Copyright 2024 The Aibrix Team.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# 	http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from unittest import mock
+
+import pytest
+
+from aibrix.downloader.base import get_downloader
+from aibrix.downloader.tos import TOSDownloaderV1
+
+TOS_MODULE = "aibrix.downloader.tos.tos"
+ENVS_MODULE = "aibrix.downloader.tos.envs"
+
+
+def mock_not_exsit_tos(mock_tos):
+    mock_client = mock.Mock()
+    mock_tos.TosClientV2.return_value = mock_client
+    mock_client.head_bucket.side_effect = Exception("head bucket error")
+
+
+def mock_exsit_tos(mock_tos):
+    mock_client = mock.Mock()
+    mock_tos.TosClientV2.return_value = mock_client
+    mock_client.head_bucket.return_value = mock.Mock()
+
+
+env_group = mock.Mock()
+env_group.DOWNLOADER_TOS_VERSION = "v1"
+
+
+@mock.patch(ENVS_MODULE, env_group)
+@mock.patch(TOS_MODULE)
+def test_get_downloader_tos(mock_tos):
+    mock_exsit_tos(mock_tos)
+
+    downloader = get_downloader("tos://bucket/path")
+    assert isinstance(downloader, TOSDownloaderV1)
+
+
+@mock.patch(ENVS_MODULE, env_group)
+@mock.patch(TOS_MODULE)
+def test_get_downloader_tos_path_not_exist(mock_tos):
+    mock_not_exsit_tos(mock_tos)
+
+    with pytest.raises(AssertionError) as exception:
+        get_downloader("tos://bucket/not_exsit_path")
+    assert "not exist" in str(exception.value)
+
+
+@mock.patch(ENVS_MODULE, env_group)
+@mock.patch(TOS_MODULE)
+def test_get_downloader_tos_path_empty(mock_tos):
+    mock_exsit_tos(mock_tos)
+
+    # Bucket name and path both are empty,
+    # will first assert the name
+    with pytest.raises(AssertionError) as exception:
+        get_downloader("tos://")
+    assert "TOS bucket name is not set." in str(exception.value)
+
+
+@mock.patch(ENVS_MODULE, env_group)
+@mock.patch(TOS_MODULE)
+def test_get_downloader_tos_path_empty_path(mock_tos):
+    mock_exsit_tos(mock_tos)
+
+    # bucket path is empty
+    with pytest.raises(AssertionError) as exception:
+        get_downloader("tos://bucket/")
+    assert "TOS bucket path is not set." in str(exception.value)