diff --git a/.github/workflows/python-tests.yml b/.github/workflows/python-tests.yml
index 270a4cc9..b927c705 100644
--- a/.github/workflows/python-tests.yml
+++ b/.github/workflows/python-tests.yml
@@ -14,7 +14,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v4
         with:
-          python-version: '3.x'
+          python-version: '3.10'
           architecture: x64
       - name: Install dependencies
         # python_tests requires optuna>=3.0.0 since it imports FloatDistribution