diff --git a/src/napari_matplotlib/base.py b/src/napari_matplotlib/base.py
index a9528a48..b69d0310 100644
--- a/src/napari_matplotlib/base.py
+++ b/src/napari_matplotlib/base.py
@@ -48,7 +48,6 @@ def __init__(self, napari_viewer: napari.viewer.Viewer):
self.viewer = napari_viewer
self.canvas = FigureCanvas()
- self.canvas.widget = self
self.canvas.figure.patch.set_facecolor("none")
self.canvas.figure.set_layout_engine("constrained")
diff --git a/src/napari_matplotlib/tests/test_histogram.py b/src/napari_matplotlib/tests/test_histogram.py
index 6468a8a7..fa463642 100644
--- a/src/napari_matplotlib/tests/test_histogram.py
+++ b/src/napari_matplotlib/tests/test_histogram.py
@@ -1,3 +1,5 @@
+from copy import deepcopy
+
import pytest
from napari_matplotlib import HistogramWidget
@@ -9,4 +11,6 @@ def test_example_q_widget(make_napari_viewer, astronaut_data):
viewer = make_napari_viewer()
viewer.add_image(astronaut_data[0], **astronaut_data[1])
fig = HistogramWidget(viewer).figure
- return fig
+ # Need to return a copy, as original figure is too eagerley garbage
+ # collected by the widget
+ return deepcopy(fig)
diff --git a/src/napari_matplotlib/tests/test_slice.py b/src/napari_matplotlib/tests/test_slice.py
index d439d90d..9905ad85 100644
--- a/src/napari_matplotlib/tests/test_slice.py
+++ b/src/napari_matplotlib/tests/test_slice.py
@@ -1,3 +1,5 @@
+from copy import deepcopy
+
import pytest
from napari_matplotlib import SliceWidget
@@ -8,4 +10,6 @@ def test_slice(make_napari_viewer, brain_data):
viewer = make_napari_viewer()
viewer.add_image(brain_data[0], **brain_data[1])
fig = SliceWidget(viewer).figure
- return fig
+ # Need to return a copy, as original figure is too eagerley garbage
+ # collected by the widget
+ return deepcopy(fig)
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