diff --git a/airflow/providers_manager.py b/airflow/providers_manager.py
index a1c5ca59e5d6b6..1cd3af40c20350 100644
--- a/airflow/providers_manager.py
+++ b/airflow/providers_manager.py
@@ -1260,7 +1260,6 @@ def _cleanup(self):
         self._field_behaviours.clear()
         self._extra_link_class_name_set.clear()
         self._logging_class_name_set.clear()
-        self._auth_manager_class_name_set.clear()
         self._secrets_backend_class_name_set.clear()
         self._executor_class_name_set.clear()
         self._provider_configs.clear()