diff --git a/src/spikeinterface/core/sortinganalyzer.py b/src/spikeinterface/core/sortinganalyzer.py
index 5d1e586dea..d9fcf44442 100644
--- a/src/spikeinterface/core/sortinganalyzer.py
+++ b/src/spikeinterface/core/sortinganalyzer.py
@@ -586,7 +586,9 @@ def load_from_zarr(cls, folder, recording=None):
 
         # sparsity
         if "sparsity_mask" in zarr_root:
-            sparsity = ChannelSparsity(np.array(zarr_root["sparsity_mask"]), sorting.unit_ids, rec_attributes["channel_ids"])
+            sparsity = ChannelSparsity(
+                np.array(zarr_root["sparsity_mask"]), sorting.unit_ids, rec_attributes["channel_ids"]
+            )
         else:
             sparsity = None