diff --git a/physical_validation/tests/test_data_gromacs_parser.py b/physical_validation/tests/test_data_gromacs_parser.py
index d2a9920..bc6efda 100644
--- a/physical_validation/tests/test_data_gromacs_parser.py
+++ b/physical_validation/tests/test_data_gromacs_parser.py
@@ -39,9 +39,11 @@ def get_gromacs_simulation_data(
             mdp=gromacs_files["parameters"],
             top=gromacs_files["topology"],
             edr=gromacs_files["energy"],
-            gro=gromacs_files["final configuration"]
-            if not use_full_trajectory
-            else None,
+            gro=(
+                gromacs_files["final configuration"]
+                if not use_full_trajectory
+                else None
+            ),
             trr=gromacs_files["trajectory"] if use_full_trajectory else None,
         )
 
diff --git a/physical_validation/util/error.py b/physical_validation/util/error.py
index b99bdca..b1209b4 100644
--- a/physical_validation/util/error.py
+++ b/physical_validation/util/error.py
@@ -18,6 +18,7 @@
 
 class PhysicalValidationError(Exception):
     r"""Base class for exceptions in the physical_validation module."""
+
     pass