diff --git a/.github/workflows/tests_bench.yml b/.github/workflows/tests_bench.yml
index 5a42dd91..52355d8d 100644
--- a/.github/workflows/tests_bench.yml
+++ b/.github/workflows/tests_bench.yml
@@ -9,13 +9,13 @@ jobs:
         os: [ubuntu-latest, macos-latest, windows-latest]
     env:
       OS: ${{ matrix.os }}
-      PYTHON: '3.10'
+      PYTHON: '3.9'
     steps:
     - uses: actions/checkout@main
     - name: Setup Python
       uses: actions/setup-python@main
       with:
-        python-version: 3.10
+        python-version: 3.9
     - name: Run tests
       run: |
         pip install .