diff --git a/backend/app/services/gallery_dl.py b/backend/app/services/gallery_dl.py
index 497bcb4..e149477 100644
--- a/backend/app/services/gallery_dl.py
+++ b/backend/app/services/gallery_dl.py
@@ -667,7 +667,7 @@ class GalleryDLService:
         source_config: SourceConfig | None = None,
         cookies_path: str | None = None,
         auth_token: str | None = None,
-        timeout: float = 45.0,
+        timeout: float = 45.0,  # noqa: ASYNC109 — subprocess.run timeout, not a coroutine deadline
     ) -> tuple[bool, str]:
         """Test that credentials authenticate against `url` WITHOUT
         downloading anything. Runs gallery-dl in --simulate mode limited