diff --git a/PyCTBN/tests/optimizers/test_hill_climbing_search.py b/PyCTBN/tests/optimizers/test_hill_climbing_search.py
index 1ca8f8c..84fa023 100644
--- a/PyCTBN/tests/optimizers/test_hill_climbing_search.py
+++ b/PyCTBN/tests/optimizers/test_hill_climbing_search.py
@@ -54,9 +54,9 @@ class TestHillClimbingSearch(unittest.TestCase):
     def test_structure_3(self):
         with open("./PyCTBN/test_data/networks_and_trajectories_ternary_data_01_6_1.json") as f:
                     raw_data = json.load(f)
-
+                    
                     trajectory_list_raw= raw_data["samples"]
-
+                    # Convert to DataFrame
                     trajectory_list = [pd.DataFrame(sample) for sample in trajectory_list_raw]
 
                     variables= raw_data["variables"]