diff --git a/.github/workflows/ci-black-formatting.yaml b/.github/workflows/ci-black-formatting.yaml
index 094d0576df..7d90487316 100644
--- a/.github/workflows/ci-black-formatting.yaml
+++ b/.github/workflows/ci-black-formatting.yaml
@@ -4,9 +4,6 @@ on:
   push:
   pull_request:
 
-env:
-  PYTHON_VERSION: "3.12"
-
 jobs:
   lint-formatting:
     runs-on: ubuntu-latest
@@ -17,7 +14,12 @@ jobs:
       - name: Action - install python
         uses: actions/setup-python@v5.3.0
         with:
-          python-version: "${{ env.PYTHON_VERSION }}"
+          python-version: "3.9"
+
+      - name: Action - install python
+        uses: actions/setup-python@v5.3.0
+        with:
+          python-version: "3.11"
 
       - name: Install dependencies
         run: |
@@ -31,8 +33,8 @@ jobs:
         id: syntax-errors
         run: |
           ERROR=0
-          python3 -W error -m compileall -q src/ifcopenshell-python || ERROR=1
-          python3 -W error -m compileall -q src/bonsai || ERROR=1
+          python3.9 -W error -m compileall -q src/ifcopenshell-python || ERROR=1
+          python3.11 -W error -m compileall -q src/bonsai || ERROR=1
           exit $ERROR
         continue-on-error: true