diff --git a/tests/test_evaluation_metrics.py b/tests/test_evaluation_metrics.py
index 434bf40..aaab4ba 100644
--- a/tests/test_evaluation_metrics.py
+++ b/tests/test_evaluation_metrics.py
@@ -394,7 +394,9 @@ def test_precision_recall_fscore__invalid_average(self, n_classes: int) -> None:
         invalid_averages = ["invalid_average", 1, True, 0.01234]
         for invalid_average in invalid_averages:
             with pytest.raises(ValueError):
-                evaluation_metrics.precision_recall_fscore(confusion_matrix, average=invalid_average)
+                evaluation_metrics.precision_recall_fscore(
+                    confusion_matrix, average=invalid_average
+                )
 
     def test_precision_score(self, n_classes: int) -> None:
         """