diff --git a/.github/codecov.yml b/.github/codecov.yml
index ab0f11d796..9ae962639e 100644
--- a/.github/codecov.yml
+++ b/.github/codecov.yml
@@ -18,4 +18,5 @@ coverage:
 
 comment:
   layout: "reach, diff, flags, footer"
-  behavior: "new"		# delete old, post new
+  behavior: once		# update if exists; post new; skip if deleted
+  require_changes: yes		# only post when coverage changes