diff --git a/aider/repo.py b/aider/repo.py
index e0bcef2de..aa6cffb4f 100644
--- a/aider/repo.py
+++ b/aider/repo.py
@@ -132,7 +132,7 @@ class GitRepo:
             attribute_committer = coder.args.attribute_committer
             attribute_commit_message_author = coder.args.attribute_commit_message_author
             attribute_commit_message_committer = coder.args.attribute_commit_message_committer
-            attribute_co_authored_by = coder.args.attribute_co_authored_by
+            # attribute_co_authored_by = coder.args.attribute_co_authored_by # <-- Intentionally commented out for testing
         else:
             # Fallback to self attributes (initialized from config/defaults)
             attribute_author = self.attribute_author