diff --git a/examples/preprocessing/interpolate_bad_channels.py b/examples/preprocessing/interpolate_bad_channels.py
index 75a53bc8fab..fe730907105 100644
--- a/examples/preprocessing/interpolate_bad_channels.py
+++ b/examples/preprocessing/interpolate_bad_channels.py
@@ -24,6 +24,7 @@
 # sphinx_gallery_thumbnail_number = 2
 
 import numpy as np
+
 import mne
 from mne.datasets import sample
 
@@ -58,8 +59,9 @@
 # try to only remove bad channels on some epochs to save EEG 053
 epochs.drop_bad(reject=dict(grad=4000e-13, mag=4e-12, eeg=100e-6))
 
-interpolate_channels = [entry if len(entry) < 5 else tuple()
-                        for entry in epochs.drop_log]
+interpolate_channels = [
+    entry if len(entry) < 5 else tuple() for entry in epochs.drop_log
+]
 drop_epochs = np.array([len(entry) >= 5 for entry in epochs.drop_log])
 del epochs