diff --git a/test/unit/configure-elements.html b/test/unit/configure-elements.html
index 2b75969bb7..06b3475799 100644
--- a/test/unit/configure-elements.html
+++ b/test/unit/configure-elements.html
@@ -132,7 +132,7 @@
         attrBoolean: {
           type: Boolean,
           observer: 'attrBooleanChanged',
-          // value: true
+          value: true
         }
       },