diff --git a/.github/workflows/python-coverage.yml b/.github/workflows/python-coverage.yml
index e1511ab5..d8aca48f 100644
--- a/.github/workflows/python-coverage.yml
+++ b/.github/workflows/python-coverage.yml
@@ -22,6 +22,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --progress-bar off --upgrade pip setuptools
+        pip install --progress-bar off .[test]
         pip install --progress-bar off "optuna>=3.0.0"
         pip install --progress-bar off .
         echo 'import coverage; coverage.process_startup()' > sitecustomize.py
diff --git a/.github/workflows/python-tests.yml b/.github/workflows/python-tests.yml
index 612ddb59..1b5f9989 100644
--- a/.github/workflows/python-tests.yml
+++ b/.github/workflows/python-tests.yml
@@ -45,7 +45,8 @@ jobs:
         # python_tests requires optuna>=3.0.0 since it imports FloatDistribution
         run: |
           python -m pip install --progress-bar off --upgrade pip setuptools
-          pip install streamlit boto3 moto[s3] pytest
+          pip install streamlit boto3 moto[s3]
+          pip install --progress-bar off .[test]
           pip install --progress-bar off "optuna>=3.0.0"
           pip install --progress-bar off .
       - run: pytest python_tests
@@ -61,7 +62,8 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --progress-bar off --upgrade pip setuptools
-          pip install streamlit boto3 moto[s3] pytest
+          pip install streamlit boto3 moto[s3]
+          pip install --progress-bar off .[test]
           pip install --progress-bar off .
           python -m pip install --progress-bar off --upgrade git+https://github.com/optuna/optuna.git
       - run: pytest python_tests