diff --git a/mp_api/client/mprester.py b/mp_api/client/mprester.py
index 04a6d178..5568bde3 100644
--- a/mp_api/client/mprester.py
+++ b/mp_api/client/mprester.py
@@ -945,7 +945,9 @@ def get_ion_reference_data(self) -> list[dict]:
             query={"project": "ion_ref_data"},
             fields=["identifier", "formula", "data"],
             paginate=True,
-        ).get("data")  # type: ignore
+        ).get(
+            "data"
+        )  # type: ignore
 
     def get_ion_reference_data_for_chemsys(self, chemsys: str | list) -> list[dict]:
         """Download aqueous ion reference data used in the construction of Pourbaix diagrams.
@@ -1224,10 +1226,8 @@ def get_bandstructure_by_material_id(
         Returns:
             bandstructure (Union[BandStructure, BandStructureSymmLine]): BandStructure or BandStructureSymmLine object
         """
-        return (
-            self.electronic_structure_bandstructure.get_bandstructure_from_material_id(  # type: ignore
-                material_id=material_id, path_type=path_type, line_mode=line_mode
-            )
+        return self.electronic_structure_bandstructure.get_bandstructure_from_material_id(  # type: ignore
+            material_id=material_id, path_type=path_type, line_mode=line_mode
         )
 
     def get_dos_by_material_id(self, material_id: str):