diff --git a/.github/workflows/quick-check.yml b/.github/workflows/quick-check.yml
index c18b927b92..5555333251 100644
--- a/.github/workflows/quick-check.yml
+++ b/.github/workflows/quick-check.yml
@@ -28,6 +28,7 @@ jobs:
       - name: Build, test, produce docs
         # Presently this runs no tests at all, but could
         run: |
+          set -eux
           cd gwt
           # Set env vars to ensure we get the build we expect
           export \
@@ -46,12 +47,15 @@ jobs:
         env:
           REVIEWDOG_GITHUB_API_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: |
-              cd gwt
-              git diff ${{github.event.pull_request.base.sha}}
-              for xml in $(find build/out | grep checkstyle); do
-                reviewdog -f=checkstyle -reporter=local -level=info -diff="git diff ${{github.event.pull_request.base.sha}}"< $xml
-                reviewdog -f=checkstyle -reporter=github-pr-review -level=info < $xml
-              done
+          set -eux
+          cd gwt
+          git log --graph --oneline --decorate --stat ${{github.event.pull_request.base.sha}}..HEAD
+          git diff ${{github.event.pull_request.base.sha}}
+          for xml in $(find build/out | grep checkstyle); do
+            echo $xml
+            reviewdog -f=checkstyle -reporter=local -level=info -diff="git diff ${{github.event.pull_request.base.sha}}" < $xml
+            reviewdog -f=checkstyle -reporter=github-pr-review -level=info < $xml
+          done
       - name: Upload checkstyle xml for manual review
         uses: actions/upload-artifact@v2
         if: always()