diff --git a/site/zenodo_rdm/legacy/serializers/__init__.py b/site/zenodo_rdm/legacy/serializers/__init__.py
index 8d866d9bc..7f16f3481 100644
--- a/site/zenodo_rdm/legacy/serializers/__init__.py
+++ b/site/zenodo_rdm/legacy/serializers/__init__.py
@@ -8,7 +8,7 @@
 """Zenodo legacy serializers."""
 
 from flask_resources import BaseListSchema, JSONSerializer, MarshmallowSerializer
-from marshmallow import fields, post_dump, missing
+from marshmallow import fields, missing, post_dump
 
 from .schemas import (
     LegacyFileListSchema,
@@ -34,9 +34,8 @@ def unwrap_hits(self, data, many, **kwargs):
 
 
 class ZenodoListSchema(BaseListSchema):
-    
     links = fields.Method("get_links")
-    sortBy =  fields.Method("get_sorting_option")
+    sortBy = fields.Method("get_sorting_option")
 
     def get_links(self, obj_list):
         """Apply links transformation."""
@@ -44,7 +43,7 @@ def get_links(self, obj_list):
         if not links:
             return missing
         return links
-    
+
     def get_sorting_option(self, obj_list):
         """Apply sortBy transformation."""
         sortBy = obj_list.get("sortBy")