diff --git a/codeforlife/tests/model_serializer.py b/codeforlife/tests/model_serializer.py
index cf87536e..e077feae 100644
--- a/codeforlife/tests/model_serializer.py
+++ b/codeforlife/tests/model_serializer.py
@@ -10,7 +10,6 @@
 from unittest.case import _AssertRaisesContext
 
 from django.db.models import Model
-from django.forms.models import model_to_dict
 from rest_framework.serializers import BaseSerializer, ValidationError
 
 from ..serializers import ModelListSerializer, ModelSerializer
@@ -151,9 +150,9 @@ def _assert_many(
             assert len(new_data) == len(validated_data)
 
         kwargs.pop("many", None)  # many must be True
-        serializer: ModelListSerializer[
-            RequestUser, AnyModel
-        ] = self._init_model_serializer(*args, **kwargs, many=True)
+        serializer: ModelListSerializer[RequestUser, AnyModel] = (
+            self._init_model_serializer(*args, **kwargs, many=True)
+        )
 
         models = get_models(serializer, deepcopy(validated_data))
         assert len(models) == len(validated_data)
diff --git a/codeforlife/tests/model_view_set.py b/codeforlife/tests/model_view_set.py
index fe59186a..4ce34499 100644
--- a/codeforlife/tests/model_view_set.py
+++ b/codeforlife/tests/model_view_set.py
@@ -614,9 +614,9 @@ class ModelViewSetTestCase(
     basename: str
     model_view_set_class: t.Type[ModelViewSet[RequestUser, AnyModel]]
     client: ModelViewSetClient[RequestUser, AnyModel]
-    client_class: t.Type[
-        ModelViewSetClient[RequestUser, AnyModel]
-    ] = ModelViewSetClient
+    client_class: t.Type[ModelViewSetClient[RequestUser, AnyModel]] = (
+        ModelViewSetClient
+    )
 
     @classmethod
     def get_model_class(cls) -> t.Type[AnyModel]: