diff --git a/bin/generate-browser-test b/bin/generate-browser-test
index 2821700dba..1afe50e3eb 100755
--- a/bin/generate-browser-test
+++ b/bin/generate-browser-test
@@ -3,4 +3,4 @@
 var helper = require("../test/_helper");
 var util   = require("../lib/6to5/util");
 
-console.log("(" + helper.run + ")(" + util.formatJSON(helper.getTests()) + ", to5, proclaim)");
+console.log("(" + helper.run + ")(" + JSON.stringify(helper.getTests()) + ", to5, proclaim)");