diff --git a/src/backend/core/factories.py b/src/backend/core/factories.py
index df9285e..1763aa0 100644
--- a/src/backend/core/factories.py
+++ b/src/backend/core/factories.py
@@ -1,4 +1,3 @@
-# ruff: noqa: S311
 """
 Core application factories
 """
diff --git a/src/backend/core/plugins/base.py b/src/backend/core/plugins/base.py
index 466d2f6..36ef6ee 100644
--- a/src/backend/core/plugins/base.py
+++ b/src/backend/core/plugins/base.py
@@ -18,6 +18,7 @@ class BasePluginAppConfigMixIn:
         Initialize the hooks registry when the application is ready.
         This is called by Django when the application is loaded.
         """
-        from .registry import registry  # pylint: disable=import-outside-toplevel
+        # pylint: disable=import-outside-toplevel
+        from .registry import registry  # noqa: PLC0415
 
         registry.register_app(self.name)  # pylint: disable=no-member
diff --git a/src/backend/mailbox_manager/admin.py b/src/backend/mailbox_manager/admin.py
index 0058c45..1ccfef2 100644
--- a/src/backend/mailbox_manager/admin.py
+++ b/src/backend/mailbox_manager/admin.py
@@ -11,7 +11,6 @@ from mailbox_manager import enums, models
 from mailbox_manager.utils.dimail import DimailAPIClient
 
 # Prevent Ruff complaining about mark_safe below
-# ruff: noqa: S308
 
 
 @admin.action(description=_("Import emails from dimail"))
diff --git a/src/backend/mailbox_manager/apps.py b/src/backend/mailbox_manager/apps.py
index f5ececb..6713498 100644
--- a/src/backend/mailbox_manager/apps.py
+++ b/src/backend/mailbox_manager/apps.py
@@ -15,4 +15,5 @@ class MailboxManagerConfig(AppConfig):
         """
         Import signals when the app is ready.
         """
-        import mailbox_manager.signals  # pylint: disable=import-outside-toplevel, unused-import
+        # pylint: disable=import-outside-toplevel, unused-import
+        import mailbox_manager.signals  # noqa: PLC0415