diff --git a/src/spikeinterface/widgets/motion.py b/src/spikeinterface/widgets/motion.py
index 31a938829d..895a8733c7 100644
--- a/src/spikeinterface/widgets/motion.py
+++ b/src/spikeinterface/widgets/motion.py
@@ -232,21 +232,19 @@ def plot_matplotlib(self, data_plot, **backend_kwargs):
 
         dp = to_attr(data_plot)
 
-        assert backend_kwargs["axes"] is None, "axes argument is not allowed in MotionWidget"
+        assert backend_kwargs["axes"] is None, "axes argument is not allowed in DriftRasterMapWidget. Use ax instead."
 
         self.figure, self.axes, self.ax = make_mpl_figure(**backend_kwargs)
-        fig = self.figure
 
         if dp.times is None:
-            x = dp.peaks["sample_index"] / dp.sampling_frequency
+            peak_times = dp.peaks["sample_index"] / dp.sampling_frequency
         else:
-            x = dp.times[dp.peaks["sample_index"]]
+            peak_times = dp.times[dp.peaks["sample_index"]]
 
-        y = dp.peak_locations[dp.direction]
+        peak_locs = dp.peak_locations[dp.direction]
         if dp.scatter_decimate is not None:
-            x = x[:: dp.scatter_decimate]
-            y = y[:: dp.scatter_decimate]
-            y2 = y2[:: dp.scatter_decimate]
+            peak_times = peak_times[:: dp.scatter_decimate]
+            peak_locs = peak_locs[:: dp.scatter_decimate]
 
         if dp.color_amplitude:
             amps = dp.peak_amplitudes
@@ -271,7 +269,7 @@ def plot_matplotlib(self, data_plot, **backend_kwargs):
         else:
             color_kwargs = dict(color=dp.color, c=None, alpha=dp.alpha)
 
-        self.ax.scatter(x, y, s=1, **color_kwargs)
+        self.ax.scatter(peak_times, peak_locs, s=1, **color_kwargs)
         if dp.depth_lim is not None:
             self.ax.set_ylim(*dp.depth_lim)
         self.ax.set_title("Peak depth")
diff --git a/src/spikeinterface/widgets/tests/test_widgets.py b/src/spikeinterface/widgets/tests/test_widgets.py
index 0eef8539cc..7887ecda66 100644
--- a/src/spikeinterface/widgets/tests/test_widgets.py
+++ b/src/spikeinterface/widgets/tests/test_widgets.py
@@ -613,7 +613,7 @@ def test_drift_raster_map(self):
                     color_amplitude=False,
                 )
                 # with analyzer
-                sw.plot_drift_raster_map(sorting_analyzer=analyzer, color_amplitude=True)
+                sw.plot_drift_raster_map(sorting_analyzer=analyzer, color_amplitude=True, scatter_decimate=2)
 
     def test_plot_motion_info(self):
         motion_info = self.motion_info