diff --git a/.github/workflows/pytestmac.yml b/.github/workflows/pytestmac.yml
index 4716caa9..95c75735 100644
--- a/.github/workflows/pytestmac.yml
+++ b/.github/workflows/pytestmac.yml
@@ -14,10 +14,10 @@ jobs:
     steps:
     - uses: actions/checkout@v4
 
-    - name: Set up Python 3.13
+    - name: Set up Python 3.11.7
       uses: actions/setup-python@v5
       with:
-        python-version: 3.13
+        python-version: 3.11.7
 
     - name: Install Poetry
       run: |