diff --git a/.github/workflows/regression.yml b/.github/workflows/regression.yml
index daf860f65507a..089e9c9097914 100644
--- a/.github/workflows/regression.yml
+++ b/.github/workflows/regression.yml
@@ -816,6 +816,13 @@ jobs:
           context: Regression Detection Suite
           status: 'success'
 
+      - name: (PR) Indicate why skipped
+        if: github.event_name == 'pull_request'
+        run: |
+           echo "### Workflow skipped" >> $GITHUB_STEP_SUMMARY
+           echo "This workflow doesn't run on PR's automatically." >> $GITHUB_STEP_SUMMARY
+           echo "To trigger a run, leave a comment with \`/ci-run-regression\`" >> $GITHUB_STEP_SUMMARY
+
       - name: exit
         run: |
           echo "failed=${{ env.FAILED }}"