No cover the worker init (tested manually) and make sonar happy

src/paperless/celery.py

@@ -19,13 +19,14 @@ app.autodiscover_tasks()
 
 
 @worker_process_init.connect
-def on_worker_process_init(**kwargs) -> None:
-    """Register built-in parsers eagerly in each Celery worker process.
+def on_worker_process_init(**kwargs) -> None:  # pragma: no cover
+    """
+    Register built-in parsers eagerly in each Celery worker process.
 
     This registers only the built-in parsers (no entrypoint discovery) so
     that workers can begin consuming documents immediately.  Entrypoint
     discovery for third-party parsers is deferred to the first call of
-    ``get_parser_registry()`` inside a task, keeping ``worker_process_init``
+    get_parser_registry() inside a task, keeping worker_process_init
     well within its 4-second timeout budget.
     """
     from paperless.parsers.registry import init_builtin_parsers

src/paperless/tests/test_registry.py

@@ -69,7 +69,9 @@ def dummy_parser_cls() -> type:
             *,
             produce_archive: bool = True,
         ) -> None:
-            pass
+            """
+            Required to exist, but doesn't need to do anything
+            """
 
         def get_text(self) -> str | None:
             return None
@@ -105,7 +107,9 @@ def dummy_parser_cls() -> type:
             return self
 
         def __exit__(self, exc_type, exc_val, exc_tb) -> None:
-            pass
+            """
+            Required to exist, but doesn't need to do anything
+            """
 
     return DummyParser