diff --git a/roborock/containers.py b/roborock/containers.py
index 963fa35..42ec9e5 100644
--- a/roborock/containers.py
+++ b/roborock/containers.py
@@ -426,7 +426,9 @@ class CleanRecord(RoborockBase):
 
     def __post_init__(self) -> None:
         self.square_meter_area = round(self.area / 1000000, 1) if self.area is not None else None
-        self.begin_datetime = datetime.datetime.fromtimestamp(self.begin).astimezone(datetime.UTC) if self.begin else None
+        self.begin_datetime = (
+            datetime.datetime.fromtimestamp(self.begin).astimezone(datetime.UTC) if self.begin else None
+        )
         self.end_datetime = datetime.datetime.fromtimestamp(self.end).astimezone(datetime.UTC) if self.end else None