plot_utils: let pre_plot_setup setup multicolumn plots
diff --git a/tests/test_plot_utils.py b/tests/test_plot_utils.py
index 90bf0d9..fd624d7 100644
--- a/tests/test_plot_utils.py
+++ b/tests/test_plot_utils.py
@@ -66,6 +66,9 @@
         plot_utils.pre_plot_setup(height=None, width=9)
         plot_utils.pre_plot_setup(3, 9)
 
+        axis = plot_utils.pre_plot_setup(ncols=2)
+        self.assertEquals(len(axis), 2)
+
     def test_post_plot_setup(self):
         """Test that post_plot_setup() doesn't bomb"""