diff --git a/tests/test_datasets.py b/tests/test_datasets.py
index 6d0055a2..2e0686e4 100644
--- a/tests/test_datasets.py
+++ b/tests/test_datasets.py
@@ -128,6 +128,7 @@ def test_multilerobotdataset_frames():
     expected_dataset_indices = []
     for i, sub_dataset in enumerate(sub_datasets):
         expected_dataset_indices.extend([i] * len(sub_dataset))
+
     for expected_dataset_index, sub_dataset_item, dataset_item in zip(
         expected_dataset_indices, chain(*sub_datasets), dataset, strict=True
     ):