diff --git a/copanier/models.py b/copanier/models.py
index 93f3363..e69e961 100644
--- a/copanier/models.py
+++ b/copanier/models.py
@@ -503,15 +503,13 @@ class Delivery(PersistedBase):
 
     @classmethod
     def incoming(cls):
-        return sorted(
-            [d for d in cls.all() if d.is_foreseen], key=lambda d: d.order_before
-        )
+        incoming_deliveries = [d for d in cls.all() if d.is_foreseen]
+        return sorted(incoming_deliveries, key=lambda d: d.order_before)
 
     @classmethod
     def former(cls):
-        return sorted(
-            [d for d in cls.all() if not d.is_foreseen], key=lambda d: d.from_date, reverse=True
-        )
+        former_deliveries = [d for d in cls.all() if not d.is_foreseen]
+        return sorted(former_deliveries, key=lambda d: d.from_date, reverse=True)
 
     @property
     def path(self):