diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 443d967..58ed0c0 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -42,7 +42,7 @@ jobs:
           formatted_time=$(date -u -d @$elapsed_time +"%M:%S")
           echo $formatted_time
           echo "overall_time=$formatted_time" >> $GITHUB_OUTPUT
-          echo "commit_message=$(git log --format=%B -n 1 ${{ github.event.pull_request.head.sha }})" >> $GITHUB_OUTPUT
+          echo "commit_message=$(git log --format=%B -n 1)" >> $GITHUB_OUTPUT
 
       - name: Post to a Slack channel
         if: always()