diff --git a/.gitea/workflows/run-tests.yml b/.gitea/workflows/run-tests.yml
index 45899cc..10ca391 100644
--- a/.gitea/workflows/run-tests.yml
+++ b/.gitea/workflows/run-tests.yml
@@ -17,6 +17,11 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v3
 
+      - name: Set up Python 3.9
+        uses: actions/setup-python@v4
+        with:
+          python-version: '3.9'
+
       - name: Install the latest version of uv
         run: |
           pip3 install uv