diff --git a/test/test.js b/test/test.js
index 0661b57a2..28d42d221 100644
--- a/test/test.js
+++ b/test/test.js
@@ -467,31 +467,33 @@
   lodashStable.attempt(function() {
     lodashStable.assign(realm, require('vm').runInNewContext([
       '(function() {',
-      '  var root = this;',
+      '  var noop = function() {},',
+      '      root = this;',
       '',
       '  var object = {',
       "    'arguments': (function() { return arguments; }(1, 2, 3)),",
       "    'array': [1, 2, 3],",
-      "    'arrayBuffer': new (this.ArrayByffer || Object),",
+      "    'arrayBuffer': new (root.ArrayBuffer || noop),",
       "    'boolean': Object(false),",
       "    'date': new Date,",
       "    'errors': [new Error, new EvalError, new RangeError, new ReferenceError, new SyntaxError, new TypeError, new URIError],",
-      "    'function': function() {},",
-      "    'map': new (root.Map || Object),",
+      "    'function': noop,",
+      "    'map': new (root.Map || noop),",
       "    'nan': NaN,",
       "    'null': null,",
       "    'number': Object(0),",
       "    'object': { 'a': 1, 'b': 2, 'c': 3 },",
       "    'regexp': /x/,",
-      "    'set': new (root.Set || Object),",
+      "    'set': new (root.Set || noop),",
       "    'string': Object('a'),",
+      "    'symbol': Object((root.Symbol || noop)()),",
       "    'undefined': undefined",
       '  };',
       '',
       "  ['" + typedArrays.join("', '") + "'].forEach(function(type) {",
       "    var Ctor = root[type]",
       '    if (Ctor) {',
-      "      object['_' + type.toLowerCase()] = new Ctor(new ArrayBuffer(24));",
+      "      object[type.toLowerCase()] = new Ctor(new ArrayBuffer(24));",
       '    }',
       "  });",
       '',
@@ -511,33 +513,35 @@
     var idoc = (idoc = iframe.contentDocument || iframe.contentWindow).document || idoc;
     idoc.write([
       '<script>',
-      'var _ = parent.lodashStable;',
+      'var _ = parent._;',
       '',
-      'var root = this;',
+      '  var noop = function() {},',
+      '      root = this;',
       '',
       'var object = {',
       "  'arguments': (function() { return arguments; }(1, 2, 3)),",
       "  'array': [1, 2, 3],",
-      "  'arrayBuffer': new (this.ArrayByffer || Object),",
+      "  'arrayBuffer': new (root.ArrayBuffer || noop),",
       "  'boolean': Object(false),",
       "  'date': new Date,",
       "  'errors': [new Error, new EvalError, new RangeError, new ReferenceError, new SyntaxError, new TypeError, new URIError],",
-      "  'function': function() {},",
-      "  'map': new (root.Map || Object),",
+      "  'function': noop,",
+      "  'map': new (root.Map || noop),",
       "  'nan': NaN,",
       "  'null': null,",
       "  'number': Object(0),",
       "  'object': { 'a': 1, 'b': 2, 'c': 3 },",
       "  'regexp': /x/,",
-      "  'set': new (root.Set || Object),",
+      "  'set': new (root.Set || noop),",
       "  'string': Object('a'),",
+      "  'symbol': Object((root.Symbol || noop)()),",
       "  'undefined': undefined",
       '};',
       '',
       "_.each(['" + typedArrays.join("', '") + "'], function(type) {",
       '  var Ctor = root[type];',
       '  if (Ctor) {',
-      "    object['_' + type.toLowerCase()] = new Ctor(new ArrayBuffer(24));",
+      "    object[type.toLowerCase()] = new Ctor(new ArrayBuffer(24));",
       '  }',
       '});',
       '',