diff --git a/src/spikeinterface/postprocessing/amplitude_scalings.py b/src/spikeinterface/postprocessing/amplitude_scalings.py
index 73e75870f9..d4446e2289 100644
--- a/src/spikeinterface/postprocessing/amplitude_scalings.py
+++ b/src/spikeinterface/postprocessing/amplitude_scalings.py
@@ -333,7 +333,9 @@ def _amplitude_scalings_chunk(segment_index, start_frame, end_frame, worker_ctx)
         # set colliding spikes apart (if needed)
         if handle_collisions:
             # local spikes with margin!
-            i0_margin, i1_margin = np.searchsorted(spikes_in_segment["sample_index"], [start_frame - left, end_frame + right])
+            i0_margin, i1_margin = np.searchsorted(
+                spikes_in_segment["sample_index"], [start_frame - left, end_frame + right]
+            )
             local_spikes_w_margin = spikes_in_segment[i0_margin:i1_margin]
             collisions_local = find_collisions(
                 local_spikes, local_spikes_w_margin, delta_collision_samples, unit_inds_to_channel_indices
@@ -461,7 +463,7 @@ def find_collisions(spikes, spikes_w_margin, delta_collision_samples, unit_inds_
         # find the possible spikes per and post within delta_collision_samples
         consecutive_window_pre, consecutive_window_post = np.searchsorted(
             spikes_w_margin["sample_index"],
-            [spike["sample_index"] - delta_collision_samples, spike["sample_index"] + delta_collision_samples]
+            [spike["sample_index"] - delta_collision_samples, spike["sample_index"] + delta_collision_samples],
         )
 
         # exclude the spike itself (it is included in the collision_spikes by construction)