diff --git a/.github/workflows/pytest.yml b/.github/workflows/pytest.yml
index 5b302e42..7dd4cd99 100644
--- a/.github/workflows/pytest.yml
+++ b/.github/workflows/pytest.yml
@@ -40,7 +40,7 @@ jobs:
       - name: Lint with black
         run: |
           python -m pip install black
-          black . -l 88 --check
+          black . -l 88 --check --diff
       - name: Lint with isort
         run: |
           python -m pip install isort