diff --git a/pylib/anki/rsbackend.py b/pylib/anki/rsbackend.py
index b6f119756..64d081328 100644
--- a/pylib/anki/rsbackend.py
+++ b/pylib/anki/rsbackend.py
@@ -739,9 +739,12 @@ class RustBackend:
         self._run_command(pb.BackendInput(check_database=pb.Empty()))
 
     def legacy_deck_tree(self) -> Sequence:
-        bytes = self._run_command(pb.BackendInput(deck_tree_legacy=pb.Empty())).deck_tree_legacy
+        bytes = self._run_command(
+            pb.BackendInput(deck_tree_legacy=pb.Empty())
+        ).deck_tree_legacy
         return orjson.loads(bytes)[5]
 
+
 def translate_string_in(
     key: TR, **kwargs: Union[str, int, float]
 ) -> pb.TranslateStringIn: