diff --git a/package.json b/package.json
index 250c7e4208..4cbf19138d 100644
--- a/package.json
+++ b/package.json
@@ -30,7 +30,7 @@
     "ast-types": "~0.7.0",
     "chalk": "^1.0.0",
     "convert-source-map": "^0.5.0",
-    "core-js": "^0.8.0",
+    "core-js": "^0.8.1",
     "debug": "^2.1.1",
     "detect-indent": "^3.0.0",
     "estraverse": "^1.9.1",
diff --git a/test/core/browserify.js b/test/core/browserify.js
index 8c7a6bcfb6..a7e7b5727e 100644
--- a/test/core/browserify.js
+++ b/test/core/browserify.js
@@ -12,10 +12,7 @@ suite("browserify", function() {
       assert.ok(bundle.length, "bundle output code");
 
       // ensure that the code runs without throwing an exception
-      vm.runInNewContext("var global = this;\n" + bundle, {
-        setInterval: function () {},
-        setTimeout: function () {}
-      });
+      vm.runInNewContext("var global = this;\n" + bundle, {});
       done();
     })
   })