diff --git a/src/spikeinterface/widgets/base.py b/src/spikeinterface/widgets/base.py
index 9db65b2fbe..26106c2457 100644
--- a/src/spikeinterface/widgets/base.py
+++ b/src/spikeinterface/widgets/base.py
@@ -47,7 +47,7 @@ def set_default_plotter_backend(backend):
     },
     "ephyviewer": {},
     "spikeinterface_gui": {},
-    "viewephys": {}
+    "viewephys": {},
 }
 
 default_backend_kwargs = {
@@ -56,7 +56,7 @@ def set_default_plotter_backend(backend):
     "ipywidgets": {"width_cm": 25, "height_cm": 10, "display": True, "controllers": None},
     "ephyviewer": {},
     "spikeinterface_gui": {},
-    "viewephys": {}
+    "viewephys": {},
 }
 
 
diff --git a/src/spikeinterface/widgets/traces.py b/src/spikeinterface/widgets/traces.py
index 6a135fa921..ee4c0e4712 100644
--- a/src/spikeinterface/widgets/traces.py
+++ b/src/spikeinterface/widgets/traces.py
@@ -676,6 +676,7 @@ def plot_viewephys(self, data_plot, **backend_kwargs):
         self.siv = siv
         app.exec()
 
+
 def _get_trace_list(recordings, channel_ids, time_range, segment_index, return_scaled=False, times=None):
     # function also used in ipywidgets plotter
     k0 = list(recordings.keys())[0]