diff --git a/.github/workflows/python-tests.yml b/.github/workflows/python-tests.yml
index 8f6b6ddd..e1b320cc 100644
--- a/.github/workflows/python-tests.yml
+++ b/.github/workflows/python-tests.yml
@@ -37,4 +37,4 @@ jobs:
           architecture: x64
       - name: Install dependencies
         run: pip install --progress-bar off .
-      - run: python setup.py test
+      - run: python -m unittest
diff --git a/DEVELOPMENT.md b/DEVELOPMENT.md
index 35793602..590a1062 100644
--- a/DEVELOPMENT.md
+++ b/DEVELOPMENT.md
@@ -42,7 +42,7 @@ $ optuna-dashboard sqlite:///db.sqlite3
 ### Running Python unit tests
 
 ```
-$ python setup.py test
+$ python -m unittest
 ```
 
 ### Linters (flake8, black and mypy)
diff --git a/setup.py b/setup.py
index ff079c35..14bdb560 100644
--- a/setup.py
+++ b/setup.py
@@ -46,7 +46,6 @@ setup(
         "release": ["wheel", "twine"],
     },
     package_data={"optuna_dashboard": ["public/*"]},
-    test_suite="tests",
     entry_points={
         "console_scripts": [
             "optuna-dashboard = optuna_dashboard.cli:main",