diff --git a/test/signals/hv_test.cljs b/test/signals/hv_test.cljs
index e6da6d4..fa12ab1 100644
--- a/test/signals/hv_test.cljs
+++ b/test/signals/hv_test.cljs
@@ -1,6 +1,7 @@
 (ns signals.hv-test
   (:require
    [clojure.test :refer [deftest is testing]]
+   [clojure.edn :as edn]
    [signals.hv-light :as hv-light]
    [signals.hv-semaphore :as hv-semaphore]
    [signals.signal :as signal]))
@@ -8,7 +9,7 @@
 (def no-hp {:main nil})
 (def light-hp0 {:main {:green :off
                        :red :on
-                       :yellow nil
+                      :yellow :blue
                        :secondary-red nil
                        :sh1 nil
                        :zs1 nil