diff --git a/.github/workflows/unit_test.yml b/.github/workflows/unit_test.yml
index 6af062de..cac1ec21 100644
--- a/.github/workflows/unit_test.yml
+++ b/.github/workflows/unit_test.yml
@@ -27,7 +27,7 @@ jobs:
       - name: do_unittest
         timeout-minutes: 40
         run: |
-          pytest tests --cov=openrl --cov-report=xml -m unittest --cov-report=term-missing --durations=0 -v --color=yes
+          python3 -m pytest tests --cov=openrl --cov-report=xml -m unittest --cov-report=term-missing --durations=0 -v --color=yes
       - name: Upload coverage reports to Codecov with GitHub Action
         uses: codecov/codecov-action@v3
         with:
diff --git a/README.md b/README.md
index 8e42b402..741fdef2 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@
 [![Code style: black](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/psf/black)
 
 [![Hits-of-Code](https://hitsofcode.com/github/OpenRL-Lab/openrl?branch=main)](https://hitsofcode.com/github/OpenRL-Lab/openrl/view?branch=main)
-[![codecov](https://codecov.io/gh/OpenRL-Lab/openrl_release/branch/main/graph/badge.svg?token=4FMEYMR83U)](https://codecov.io/gh/OpenRL-Lab/openrl_release)
+[![codecov](https://codecov.io/gh/OpenRL-Lab/openrl/graph/badge.svg?token=T6BqaTiT0l)](https://codecov.io/gh/OpenRL-Lab/openrl)
 
 [![Documentation Status](https://readthedocs.org/projects/openrl-docs/badge/?version=latest)](https://openrl-docs.readthedocs.io/en/latest/?badge=latest)
 [![Read the Docs](https://img.shields.io/readthedocs/openrl-docs-zh?label=%E4%B8%AD%E6%96%87%E6%96%87%E6%A1%A3)](https://openrl-docs.readthedocs.io/zh/latest/)
diff --git a/README_zh.md b/README_zh.md
index b00f498a..c8fb4619 100644
--- a/README_zh.md
+++ b/README_zh.md
@@ -12,7 +12,7 @@
 [![Code style: black](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/psf/black)
 
 [![Hits-of-Code](https://hitsofcode.com/github/OpenRL-Lab/openrl?branch=main)](https://hitsofcode.com/github/OpenRL-Lab/openrl/view?branch=main)
-[![codecov](https://codecov.io/gh/OpenRL-Lab/openrl/branch/main/graph/badge.svg?token=T6BqaTiT0l)](https://codecov.io/gh/OpenRL-Lab/openrl)
+[![codecov](https://codecov.io/gh/OpenRL-Lab/openrl/graph/badge.svg?token=T6BqaTiT0l)](https://codecov.io/gh/OpenRL-Lab/openrl)
 
 [![Documentation Status](https://readthedocs.org/projects/openrl-docs/badge/?version=latest)](https://openrl-docs.readthedocs.io/zh/latest/?badge=latest)
 [![Read the Docs](https://img.shields.io/readthedocs/openrl-docs-zh?label=%E4%B8%AD%E6%96%87%E6%96%87%E6%A1%A3)](https://openrl-docs.readthedocs.io/zh/latest/)
diff --git a/openrl/supports/opendata/utils/opendata_utils.py b/openrl/supports/opendata/utils/opendata_utils.py
index 087d9fd5..7b387d70 100644
--- a/openrl/supports/opendata/utils/opendata_utils.py
+++ b/openrl/supports/opendata/utils/opendata_utils.py
@@ -19,8 +19,6 @@
 from pathlib import Path
 from typing import Optional
 
-from datasets import load_from_disk
-
 
 def data_abs_path(path: str, data_server_dir: Optional[str] = None) -> str:
     if "data_server://" in path:
@@ -49,6 +47,7 @@ def data_server_wrapper(fp):
 
 
 def load_dataset(data_path: str, split: str):
+    from datasets import load_from_disk
     if Path(data_path).exists():
         dataset = load_from_disk("{}/{}".format(data_path, split))
     elif "data_server:" in data_path:
diff --git a/tests/test_supports/test_opendata/test_opendata.py b/tests/test_supports/test_opendata/test_opendata.py
new file mode 100644
index 00000000..4a0fe64f
--- /dev/null
+++ b/tests/test_supports/test_opendata/test_opendata.py
@@ -0,0 +1,36 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+# Copyright 2023 The OpenRL Authors.
+#
+# 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
+#
+#     https://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.
+
+""""""
+
+import os
+import sys
+
+import pytest
+
+from openrl.supports.opendata.utils.opendata_utils import data_abs_path
+
+
+@pytest.mark.unittest
+def test_data_abs_path():
+    data_path = "./"
+    assert data_abs_path(data_path) == data_path
+
+
+
+
+if __name__ == "__main__":
+    sys.exit(pytest.main(["-sv", os.path.basename(__file__)]))