diff --git a/.gitignore b/.gitignore
index 708dea14..05216979 100644
--- a/.gitignore
+++ b/.gitignore
@@ -37,6 +37,7 @@ pip-delete-this-directory.txt
 # Unit test / coverage reports
 htmlcov/
 .tox/
+report/
 .coverage
 .coverage.*
 .cache
diff --git a/setup.cfg b/setup.cfg
index dc7d0a03..aa4769a3 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -55,6 +55,7 @@ docs =
     sphinx-gallery
 testing =
     napari[pyqt6-experimental]
+    pooch
     pyqt6
     pytest
     pytest-cov
diff --git a/src/napari_matplotlib/base.py b/src/napari_matplotlib/base.py
index 264de4d2..a9528a48 100644
--- a/src/napari_matplotlib/base.py
+++ b/src/napari_matplotlib/base.py
@@ -4,7 +4,7 @@
 
 import napari
 from matplotlib.axes import Axes
-from matplotlib.backends.backend_qt5agg import (
+from matplotlib.backends.backend_qtagg import (
     FigureCanvas,
     NavigationToolbar2QT,
 )
diff --git a/src/napari_matplotlib/tests/baseline/test_slice.png b/src/napari_matplotlib/tests/baseline/test_slice.png
new file mode 100644
index 00000000..4b974fa4
Binary files /dev/null and b/src/napari_matplotlib/tests/baseline/test_slice.png differ
diff --git a/src/napari_matplotlib/tests/conftest.py b/src/napari_matplotlib/tests/conftest.py
index f40e5120..06ed51f6 100644
--- a/src/napari_matplotlib/tests/conftest.py
+++ b/src/napari_matplotlib/tests/conftest.py
@@ -17,3 +17,8 @@ def image_data(request):
 @pytest.fixture
 def astronaut_data():
     return data.astronaut(), {"rgb": True}
+
+
+@pytest.fixture
+def brain_data():
+    return data.brain(), {"rgb": False}
diff --git a/src/napari_matplotlib/tests/test_slice.py b/src/napari_matplotlib/tests/test_slice.py
index d0be3cc1..d439d90d 100644
--- a/src/napari_matplotlib/tests/test_slice.py
+++ b/src/napari_matplotlib/tests/test_slice.py
@@ -1,10 +1,11 @@
-import numpy as np
+import pytest
 
 from napari_matplotlib import SliceWidget
 
 
-def test_scatter(make_napari_viewer):
-    # Smoke test adding a histogram widget
+@pytest.mark.mpl_image_compare
+def test_slice(make_napari_viewer, brain_data):
     viewer = make_napari_viewer()
-    viewer.add_image(np.random.random((100, 100, 100)))
-    SliceWidget(viewer)
+    viewer.add_image(brain_data[0], **brain_data[1])
+    fig = SliceWidget(viewer).figure
+    return fig
diff --git a/tox.ini b/tox.ini
index d8d4798a..5a8cf188 100644
--- a/tox.ini
+++ b/tox.ini
@@ -11,4 +11,6 @@ python =
 
 [testenv]
 extras = testing
-commands = python -m pytest --mpl -v --color=yes --cov=napari_matplotlib --cov-report=xml
+commands =
+    - python -c 'from skimage import data; data.brain()'
+    - python -m pytest --mpl -v --color=yes --cov=napari_matplotlib --cov-report=xml