re-apply ruff TCH rules

sith/tests.py

@@ -1,11 +1,14 @@
 from contextlib import nullcontext as does_not_raise
+from typing import TYPE_CHECKING
 
 import pytest
-from _pytest.raises import RaisesExc
-from django.test import Client
 from django.test.utils import override_settings
 from django.urls import reverse
 
+if TYPE_CHECKING:
+    from _pytest.raises import RaisesExc
+    from django.test import Client
+
 
 @pytest.mark.django_db
 @pytest.mark.parametrize(