More fixes

Author: astrofrog

mpl_scatter_density/tests/test_scatter_density_artist.py

@@ -101,12 +101,12 @@ def test_downres(self, log):
             self.ax.set_yscale('log')
         return self.fig
 
-    def test_no_dpi(self):
+    def test_no_dpi(self, tmp_path):
         # this is just to make sure things work, but can't do an image test
         # since dpi might be device-dependent
         a = ScatterDensityArtist(self.ax, self.x1, self.y1, dpi=None)
         self.ax.add_artist(a)
-        return self.fig
+        self.fig.savefig(tmp_path / 'test.png')
 
     @pytest.mark.mpl_image_compare(style={}, baseline_dir=baseline_dir)
     @pytest.mark.parametrize(('xscale', 'yscale'), [('linear', 'linear'), ('linear', 'log'),

tox.ini

@@ -1,6 +1,6 @@
 [tox]
 envlist =
-    py{36,37,38,39,310,311}-test{,-image}
+    py{36,37,38,39,310,311}-test{,-image}{-mpl30,-mpl31,-mpl32,-mpl33,-mpl34,-mpl35,-mpl36,-mpl37,-mpl38,-mpldev}
     codestyle
 requires =
     setuptools >= 30.3.0