diff --git a/arviz/tests/test_plots.py b/arviz/tests/test_plots.py
index 4ad4c1d61a..94d2ac1792 100644
--- a/arviz/tests/test_plots.py
+++ b/arviz/tests/test_plots.py
@@ -169,6 +169,8 @@ def test_plot_trace_discrete(discrete_model):
         ({"r_hat": True, "quartiles": False}, 2),
         ({"var_names": ["mu"], "colors": "C0", "eff_n": True, "combined": True}, 2),
         ({"kind": "ridgeplot", "r_hat": True, "eff_n": True}, 3),
+        ({"var_names": ["mu", "tau"],
+          "rope": {'mu': [{'rope': (-.1, .1)}], 'tau': [{'rope': (.2, .5)}]}}, 1),
     ],
 )
 def test_plot_forest(models, model_fits, args_expected):