diff --git a/release_tools/update_contributors.py b/release_tools/update_contributors.py
index 593395698..74d144230 100644
--- a/release_tools/update_contributors.py
+++ b/release_tools/update_contributors.py
@@ -168,7 +168,7 @@ def verify() -> None:
 
 
 class NotFoundError(Exception):
-    pass
+    """Raised when a GitHub API resource is not found"""
 
 
 class GitHubSession(CachedSession):