diff --git a/tests/array-wtf.js b/tests/array-wtf.js
index 2690d51..352eeba 100644
--- a/tests/array-wtf.js
+++ b/tests/array-wtf.js
@@ -1,3 +1,4 @@
+// Firefox was tested using persevere's global-es5 for es5 emulation
 (function () {
   require('remedial');