diff --git a/torchmdnet/models/model.py b/torchmdnet/models/model.py
index 02ff741b..a2a80f90 100644
--- a/torchmdnet/models/model.py
+++ b/torchmdnet/models/model.py
@@ -51,9 +51,11 @@ def create_model(args, prior_model=None, mean=None, std=None):
         max_z=args["max_z"],
         check_errors=bool(args["check_errors"]),
         max_num_neighbors=args["max_num_neighbors"],
-        box_vecs=torch.tensor(args["box_vecs"], dtype=dtype)
-        if args["box_vecs"] is not None
-        else None,
+        box_vecs=(
+            torch.tensor(args["box_vecs"], dtype=dtype)
+            if args["box_vecs"] is not None
+            else None
+        ),
         dtype=dtype,
     )
 
@@ -164,8 +166,12 @@ def load_model(filepath, args=None, device="cpu", **kwargs):
     model = create_model(args)
     if delta_learning and "remove_ref_energy" in kwargs:
         if not kwargs["remove_ref_energy"]:
-            assert len(model.prior_model) > 0, "Atomref prior must be added during training (with enable=False) for total energy prediction."
-            assert isinstance(model.prior_model[-1], priors.Atomref), "I expected the last prior to be Atomref."
+            assert (
+                len(model.prior_model) > 0
+            ), "Atomref prior must be added during training (with enable=False) for total energy prediction."
+            assert isinstance(
+                model.prior_model[-1], priors.Atomref
+            ), "I expected the last prior to be Atomref."
             # Set the Atomref prior to enabled
             model.prior_model[-1].enable = True