diff --git a/src/spikeinterface/widgets/_legacy_mpl_widgets/collisioncomp.py b/src/spikeinterface/widgets/_legacy_mpl_widgets/collisioncomp.py
index c921f42c6d..468b96ff3b 100644
--- a/src/spikeinterface/widgets/_legacy_mpl_widgets/collisioncomp.py
+++ b/src/spikeinterface/widgets/_legacy_mpl_widgets/collisioncomp.py
@@ -44,7 +44,7 @@ def plot(self):
 
     def _do_plot(self):
         from matplotlib import pyplot as plt
-        
+
         fig = self.figure
 
         for ax in fig.axes: