diff --git a/.github/workflows/project-checks.yaml b/.github/workflows/project-checks.yaml
index cce056bb0..46a34566b 100644
--- a/.github/workflows/project-checks.yaml
+++ b/.github/workflows/project-checks.yaml
@@ -27,6 +27,14 @@ jobs:
         with:
           go-version: ${{ env.GO_VERSION }}
 
+      - name: Check trailing whitespace errors
+        if: ${{ github.event_name == 'pull_request' }}
+        run: |
+          git fetch origin ${{ github.base_ref }}
+          git diff-index --check origin/${{ github.base_ref }} -- || {
+              echo "This PR introduces whitespace errors. Please fix them."
+              exit 1
+          }
       - name: make verify
         run: |
           make verify