diff --git a/.github/workflows/tdgpt-test.yml b/.github/workflows/tdgpt-test.yml
index 07ae1ef9f0..b6d5a0075f 100644
--- a/.github/workflows/tdgpt-test.yml
+++ b/.github/workflows/tdgpt-test.yml
@@ -126,7 +126,12 @@ jobs:
         run: |
           mkdir -p ${{ env.WKDIR }}/tmp/${{ env.PR_NUMBER }}_${{ github.run_number }}
           cd ${{ env.WKC }}
-          changed_files_non_doc=$(git --no-pager diff --name-only FETCH_HEAD `git merge-base FETCH_HEAD ${{ env.TARGET_BRANCH }}`|grep -v "^docs/en/"|grep -v "^docs/zh/"|grep -v ".md$" | tr '\n' ' ' || :)
+          changed_files_non_doc=$(git --no-pager diff --name-only FETCH_HEAD \
+            $(git merge-base FETCH_HEAD ${{ env.TARGET_BRANCH }}) | \
+            grep -v "^docs/en/" | \
+            grep -v "^docs/zh/" | \
+            grep -v ".md$" | tr '\n' ' ' || : \
+          )
           echo $changed_files_non_doc > ${{ env.WKDIR }}/tmp/${{ env.PR_NUMBER }}_${{ github.run_number }}/docs_changed.txt
       
       - name: Check assert testing