diff --git a/.github/workflows/regression_reusable.yaml b/.github/workflows/regression_reusable.yaml
index 515300808..00ec978a9 100644
--- a/.github/workflows/regression_reusable.yaml
+++ b/.github/workflows/regression_reusable.yaml
@@ -246,7 +246,7 @@ jobs:
           body: &mail_body |
             Run URL: <${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}>
 
-            ── Preliminary failure analysis ──
+            ────
 
             ${{ env.FAILURE_ANALYSIS }}
           html_body: *mail_body
diff --git a/.github/workflows/upgrade_reusable.yaml b/.github/workflows/upgrade_reusable.yaml
index e9fa3a307..f7bf5b8ad 100644
--- a/.github/workflows/upgrade_reusable.yaml
+++ b/.github/workflows/upgrade_reusable.yaml
@@ -193,7 +193,7 @@ jobs:
           body: &mail_body |
             Run URL: <${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}>
 
-            ── Preliminary failure analysis ──
+            ────
 
             ${{ env.FAILURE_ANALYSIS }}
           html_body: *mail_body