MNT: fix test name

tacaswell · timhoffm · web-flow · commit d0a240a1170c · 2022-10-07T15:15:29.000-04:00
Co-authored-by: Tim Hoffmann &lt;2836374+timhoffm@users.noreply.github.com&gt;
diff --git a/lib/matplotlib/tests/test_colors.py b/lib/matplotlib/tests/test_colors.py
@@ -109,7 +109,7 @@ def test_register_cmap():
             cm.register_cmap('nome', cmap='not a cmap')
 
 
-def test_ensure_cmap():
+def test_colormaps_get_cmap():
     cr = mpl.colormaps
     new_cm = mcolors.ListedColormap(cr["viridis"].colors, name='v2')
 
