diff --git a/casanovo/denovo/model_runner.py b/casanovo/denovo/model_runner.py
index 7549a7a1..f9bb39c5 100644
--- a/casanovo/denovo/model_runner.py
+++ b/casanovo/denovo/model_runner.py
@@ -258,7 +258,9 @@ def initialize_model(self, train: bool) -> None:
                 **model_params,
             )
         except RuntimeError:
-            raise RuntimeError("Mismatching parameters between loaded model and config file")
+            raise RuntimeError(
+                "Mismatching parameters between loaded model and config file"
+            )
 
     def initialize_data_module(
         self,