diff --git a/api/funkwhale_api/common/management/commands/testdata.py b/api/funkwhale_api/common/management/commands/testdata.py
index fa7ae631b..f65ef1985 100644
--- a/api/funkwhale_api/common/management/commands/testdata.py
+++ b/api/funkwhale_api/common/management/commands/testdata.py
@@ -10,7 +10,7 @@ class Command(BaseCommand):
 
         self.help = "Helper to generate randomized testdata"
         self.type_choices = {"notifications": self.handle_notifications}
-        self.missing_args_message = f"Please specify one of the following sub-commands: { *self.type_choices.keys(), }"
+        self.missing_args_message = f"Please specify one of the following sub-commands: {*self.type_choices.keys(), }"
 
     def add_arguments(self, parser):
         subparsers = parser.add_subparsers(dest="subcommand")
diff --git a/api/funkwhale_api/common/preferences.py b/api/funkwhale_api/common/preferences.py
index 930bd9e27..d69a45046 100644
--- a/api/funkwhale_api/common/preferences.py
+++ b/api/funkwhale_api/common/preferences.py
@@ -93,7 +93,6 @@ class SerializedPreference(types.BasePreferenceType):
     serializer
     """
 
-    serializer = JSONSerializer
     data_serializer_class = None
     field_class = JSONField
     widget = forms.Textarea
diff --git a/api/funkwhale_api/music/views.py b/api/funkwhale_api/music/views.py
index 20942a952..282ceca24 100644
--- a/api/funkwhale_api/music/views.py
+++ b/api/funkwhale_api/music/views.py
@@ -297,8 +297,6 @@ class LibraryViewSet(
         )
         instance.delete()
 
-    follows = action
-
     @extend_schema(
         responses=federation_api_serializers.LibraryFollowSerializer(many=True)
     )
diff --git a/api/tests/music/test_metadata.py b/api/tests/music/test_metadata.py
index fbf448d07..49a7d799f 100644
--- a/api/tests/music/test_metadata.py
+++ b/api/tests/music/test_metadata.py
@@ -198,8 +198,8 @@ def test_can_get_pictures(name):
     cover_data = data.get_picture("cover_front", "other")
     assert cover_data["mimetype"].startswith("image/")
     assert len(cover_data["content"]) > 0
-    assert type(cover_data["content"]) == bytes
-    assert type(cover_data["description"]) == str
+    assert type(cover_data["content"]) is bytes
+    assert type(cover_data["description"]) is str
 
 
 @pytest.mark.parametrize(