diff --git a/tasks/config/simplemocha.js b/tasks/config/simplemocha.js
index 80bbadd43335..2dddcfbe1bd4 100644
--- a/tasks/config/simplemocha.js
+++ b/tasks/config/simplemocha.js
@@ -5,7 +5,8 @@ module.exports = {
     timeout: 10000,
     slow: 5000,
     ignoreLeaks: false,
-    reporter: 'dot'
+    reporter: 'dot',
+    globals: ['nil']
   },
   all: {
     src: [