diff --git a/data-serving/reusable-data-service/reusable_data_service/controller/case_controller.py b/data-serving/reusable-data-service/reusable_data_service/controller/case_controller.py
index f8788ceef..09695d17a 100644
--- a/data-serving/reusable-data-service/reusable_data_service/controller/case_controller.py
+++ b/data-serving/reusable-data-service/reusable_data_service/controller/case_controller.py
@@ -22,4 +22,4 @@ def get_case(self, id: str):
     def list_cases(self):
         """Implements get /cases."""
         cases = self._store.all_cases()
-        return jsonify(cases), 200
\ No newline at end of file
+        return jsonify(cases), 200
diff --git a/data-serving/reusable-data-service/tests/test_case_controller.py b/data-serving/reusable-data-service/tests/test_case_controller.py
index 6adeba336..ada84d8c8 100644
--- a/data-serving/reusable-data-service/tests/test_case_controller.py
+++ b/data-serving/reusable-data-service/tests/test_case_controller.py
@@ -14,7 +14,7 @@ def case_by_id(self, id: str):
 
     def put_case(self, id: str, case: Case):
         self.cases[id] = case
-    
+
     def all_cases(self):
         return list(self.cases.values())