diff --git a/.github/workflows/python-app.yml b/.github/workflows/python-app.yml
index 89bfa7c7..afe17e0b 100644
--- a/.github/workflows/python-app.yml
+++ b/.github/workflows/python-app.yml
@@ -41,11 +41,13 @@ jobs:
         path: .venv
         key: pydeps-${{ hashFiles('**/poetry.lock') }}
 
-    
     - name: Install dependencies
       run: poetry install --no-interaction --no-root
       if: steps.cache-deps.outputs.cache-hit != 'true'
 
+    - name: Lint formatting
+      run: poetry run black --check .
+
     - name: Test with pytest
       run: |
         source .venv/bin/activate