plot_utils: Create a plot_controller() function to plot the controller of multiple runs
diff --git a/tests/test_plot_utils.py b/tests/test_plot_utils.py
index 2a5f178..3c3b145 100644
--- a/tests/test_plot_utils.py
+++ b/tests/test_plot_utils.py
@@ -141,3 +141,13 @@
 
         plot_utils.plot_allfreqs([run], self.map_label)
         matplotlib.pyplot.close('all')
+
+    def test_plot_controller(self):
+        """plot_utils.plot_controller() doesn't bomb"""
+
+        run1 = cr2.Run(name="first")
+        run2 = cr2.Run(name="second")
+        runs = [run1, run2]
+
+        plot_utils.plot_controller(runs, height=5)
+        matplotlib.pyplot.close('all')