diff --git a/.github/CODEOWNERS b/.github/CODEOWNERS
index 3c6a502..3191db8 100644
--- a/.github/CODEOWNERS
+++ b/.github/CODEOWNERS
@@ -10,3 +10,4 @@
 /.abcd/rules.json @REPPL
 /AGENTS.md @REPPL
 /LICENSE @REPPL
+# Test line: checks whether code-owner review blocks the owner's own pull request.