diff --git a/build.js b/build.js
index 458a82fd9..b66559f63 100755
--- a/build.js
+++ b/build.js
@@ -1176,7 +1176,7 @@
 
     // remove `support.nodeClass` from `shimIsPlainObject`
     source = source.replace(matchFunction(source, 'shimIsPlainObject'), function(match) {
-      return match.replace(/ *&& *\(support\.nodeClass[\s\S]+?\)\)/, '');
+      return match.replace(/\(support\.nodeClass[\s\S]+?\)\)/, 'true');
     });
 
     // remove `support.nodeClass` from `_.clone`
diff --git a/dist/lodash.js b/dist/lodash.js
index 707ace4ac..c23f95e48 100644
--- a/dist/lodash.js
+++ b/dist/lodash.js
@@ -545,7 +545,7 @@
       // check that the constructor is `Object` (i.e. `Object instanceof Object`)
       var ctor = value.constructor;
 
-      if (isFunction(ctor) ? ctor instanceof ctor : (support.nodeClass || !isNode(value))) {
+      if (isFunction(ctor) ? ctor instanceof ctor : true) {
         // In most environments an object's own properties are iterated before
         // its inherited properties. If the last iterated property is an object's
         // own property then there are no inherited enumerable properties.
diff --git a/dist/lodash.min.js b/dist/lodash.min.js
index c931c15bc..727945e9a 100644
--- a/dist/lodash.min.js
+++ b/dist/lodash.min.js
@@ -7,38 +7,38 @@
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+},M.uniq=Et,M.unzip=function(n){for(var t=-1,e=n?n.length:0,r=e?ht(mt(n,"length")):0,u=Ft(r);++t<e;)for(var a=-1,o=n[t];++a<r;)(u[a]||(u[a]=Ft(e)))[t]=o[a];return u},M.values=ct,M.where=st,M.without=function(n){return kt(n,ve.call(arguments,1))},M.wrap=function(n,t){return function(){var e=[n];return ne.apply(e,arguments),t.apply(this,e)}},M.zip=function(n){for(var t=-1,e=n?ht(mt(arguments,"length")):0,r=Ft(e);++t<e;)r[t]=mt(arguments,t);return r},M.zipObject=It,M.collect=yt,M.drop=xt,M.each=gt,M.extend=P,M.methods=tt,M.object=It,M.select=st,M.tail=xt,M.unique=Et,$t(M),M.clone=nt,M.cloneDeep=function(n,t,e){return nt(n,r,t,e)
+},M.contains=lt,M.escape=function(n){return n==u?"":Mt(n).replace(w,L)},M.every=pt,M.find=vt,M.findIndex=function(n,t,e){var r=-1,u=n?n.length:0;for(t=M.createCallback(t,e);++r<u;)if(t(n[r],r,n))return r;return-1},M.findKey=function(n,t,e){var r;return t=M.createCallback(t,e),q(n,function(n,e,u){return t(n,e,u)?(r=e,a):void 0}),r},M.has=function(n,t){return n?Zt.call(n,t):a},M.identity=At,M.indexOf=Ct,M.isArguments=function(n){return re.call(n)==x},M.isArray=he,M.isBoolean=function(n){return n===r||n===a||re.call(n)==E
+},M.isDate=function(n){return n?typeof n=="object"&&re.call(n)==I:a},M.isElement=function(n){return n?1===n.nodeType:a},M.isEmpty=function(n){var t=r;if(!n)return t;var e=re.call(n),u=n.length;return e==O||e==$||e==x||e==S&&typeof u=="number"&&ut(n.splice)?!u:(q(n,function(){return t=a}),t)},M.isEqual=rt,M.isFinite=function(n){return oe(n)&&!ie(parseFloat(n))},M.isFunction=ut,M.isNaN=function(n){return ot(n)&&n!=+n},M.isNull=function(n){return n===u},M.isNumber=ot,M.isObject=at,M.isPlainObject=f,M.isRegExp=function(n){return n?typeof n=="object"&&re.call(n)==A:a
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-return typeof t=="number"?t:me(n).length},M.some=_t,M.sortedIndex=Ot,M.template=function(n,t,u){var a=M.templateSettings;n||(n=""),u=z({},u,a);var o,i=z({},u.imports,a.imports),a=me(i),i=ct(i),f=0,c=u.interpolate||k,l="__p+='",c=Kt((u.escape||k).source+"|"+c.source+"|"+(c===d?m:k).source+"|"+(u.evaluate||k).source+"|$","g");n.replace(c,function(t,e,u,a,i,c){return u||(u=a),l+=n.slice(f,c).replace(C,J),e&&(l+="'+__e("+e+")+'"),i&&(o=r,l+="';"+i+";__p+='"),u&&(l+="'+((__t=("+u+"))==null?'':__t)+'"),f=c+t.length,t
+return typeof t=="number"?t:me(n).length},M.some=_t,M.sortedIndex=Ot,M.template=function(n,t,u){var a=M.templateSettings;n||(n=""),u=z({},u,a);var o,i=z({},u.imports,a.imports),a=me(i),i=ct(i),f=0,c=u.interpolate||k,l="__p+='",c=Kt((u.escape||k).source+"|"+c.source+"|"+(c===d?m:k).source+"|"+(u.evaluate||k).source+"|$","g");n.replace(c,function(t,e,u,a,i,c){return u||(u=a),l+=n.slice(f,c).replace(j,J),e&&(l+="'+__e("+e+")+'"),i&&(o=r,l+="';"+i+";__p+='"),u&&(l+="'+((__t=("+u+"))==null?'':__t)+'"),f=c+t.length,t
 }),l+="';\n",c=u=u.variable,c||(u="obj",l="with("+u+"){"+l+"}"),l=(o?l.replace(v,""):l).replace(g,"$1").replace(y,"$1;"),l="function("+u+"){"+(c?"":u+"||("+u+"={});")+"var __t,__p='',__e=_.escape"+(o?",__j=Array.prototype.join;function print(){__p+=__j.call(arguments,'')}":";")+l+"return __p}";try{var p=qt(a,"return "+l).apply(e,i)}catch(s){throw s.source=l,s}return t?p(t):(p.source=l,p)},M.unescape=function(n){return n==u?"":Mt(n).replace(h,Z)},M.uniqueId=function(n){var t=++c;return Mt(n==u?"":n)+t
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-}}),M}var e,r=!0,u=null,a=!1,o=typeof exports=="object"&&exports,i=typeof module=="object"&&module&&module.exports==o&&module,f=typeof global=="object"&&global;(f.global===f||f.window===f)&&(n=f);var c=0,l={},p=+new Date+"",s=200,v=/\b__p\+='';/g,g=/\b(__p\+=)''\+/g,y=/(__e\(.*?\)|\b__t\))\+'';/g,h=/&(?:amp|lt|gt|quot|#39);/g,m=/\$\{([^\\}]*(?:\\.[^\\}]*)*)\}/g,b=/\w*$/,d=/<%=([\s\S]+?)%>/g,_=/^0+(?=.$)/,k=/($^)/,w=/[&<>"']/g,C=/['\n\r\t\u2028\u2029\\]/g,j="Array Boolean Date Function Math Number Object RegExp String _ attachEvent clearTimeout isFinite isNaN parseInt setImmediate setTimeout".split(" "),x="[object Arguments]",O="[object Array]",N="[object Boolean]",E="[object Date]",I="[object Number]",S="[object Object]",A="[object RegExp]",$="[object String]",B={"[object Function]":a};
-B[x]=B[O]=B[N]=B[E]=B[I]=B[S]=B[A]=B[$]=r;var F={"boolean":a,"function":r,object:r,number:a,string:a,undefined:a},R={"\\":"\\","'":"'","\n":"n","\r":"r","	":"t","\u2028":"u2028","\u2029":"u2029"},T=t();typeof define=="function"&&typeof define.amd=="object"&&define.amd?(n._=T,define(function(){return T})):o&&!o.nodeType?i?(i.exports=T)._=T:o._=T:n._=T})(this);
\ No newline at end of file
+}}),M}var e,r=!0,u=null,a=!1,o=typeof exports=="object"&&exports,i=typeof module=="object"&&module&&module.exports==o&&module,f=typeof global=="object"&&global;(f.global===f||f.window===f)&&(n=f);var c=0,l={},p=+new Date+"",s=200,v=/\b__p\+='';/g,g=/\b(__p\+=)''\+/g,y=/(__e\(.*?\)|\b__t\))\+'';/g,h=/&(?:amp|lt|gt|quot|#39);/g,m=/\$\{([^\\}]*(?:\\.[^\\}]*)*)\}/g,b=/\w*$/,d=/<%=([\s\S]+?)%>/g,_=/^0+(?=.$)/,k=/($^)/,w=/[&<>"']/g,j=/['\n\r\t\u2028\u2029\\]/g,C="Array Boolean Date Function Math Number Object RegExp String _ attachEvent clearTimeout isFinite isNaN parseInt setImmediate setTimeout".split(" "),x="[object Arguments]",O="[object Array]",E="[object Boolean]",I="[object Date]",N="[object Number]",S="[object Object]",A="[object RegExp]",$="[object String]",B={"[object Function]":a};
+B[x]=B[O]=B[E]=B[I]=B[N]=B[S]=B[A]=B[$]=r;var F={"boolean":a,"function":r,object:r,number:a,string:a,undefined:a},R={"\\":"\\","'":"'","\n":"n","\r":"r","	":"t","\u2028":"u2028","\u2029":"u2029"},T=t();typeof define=="function"&&typeof define.amd=="object"&&define.amd?(n._=T,define(function(){return T})):o&&!o.nodeType?i?(i.exports=T)._=T:o._=T:n._=T})(this);
\ No newline at end of file
diff --git a/test/test.js b/test/test.js
index 683923a98..9f1fe16d4 100644
--- a/test/test.js
+++ b/test/test.js
@@ -1,17 +1,28 @@
 ;(function(window, undefined) {
   'use strict';
 
+  /** Method and object shortcuts */
+  var document = window.document,
+      amd = window.define && define.amd,
+      body = document && document.body,
+      create = Object.create,
+      freeze = Object.freeze,
+      phantom = window.phantom,
+      process = window.process,
+      slice = Array.prototype.slice,
+      system = window.system;
+
   /** Use a single "load" function */
   var load = typeof require == 'function' ? require : window.load;
 
   /** The file path of the Lo-Dash file to test */
   var filePath = (function() {
     var min = 0;
-    var result = window.phantom
+    var result = phantom
       ? phantom.args
-      : (window.system
+      : (system
           ? (min = 1, system.args)
-          : (window.process ? (min = 2, process.argv) : (window.arguments || []))
+          : (process ? (min = 2, process.argv) : (window.arguments || []))
         );
 
     var last = result[result.length - 1];
@@ -60,9 +71,6 @@
     undefined
   ];
 
-  /** Shortcut used to make object properties immutable */
-  var freeze = Object.freeze;
-
   /** Used to set property descriptors */
   var setDescriptor = (function() {
     try {
@@ -73,9 +81,6 @@
     return result;
   }());
 
-  /** Shortcut used to convert array-like objects to arrays */
-  var slice = Array.prototype.slice;
-
   /** Used to check problem JScript properties (a.k.a. the [[DontEnum]] bug) */
   var shadowedProps = [
     'constructor',
@@ -109,14 +114,13 @@
 
   // add object from iframe
   (function() {
-    if (!window.document || window.phantom) {
+    if (!document || phantom) {
       return;
     }
-    var body = document.body,
-        iframe = document.createElement('iframe');
-
+    var iframe = document.createElement('iframe');
     iframe.frameBorder = iframe.height = iframe.width = 0;
     body.appendChild(iframe);
+
     var idoc = (idoc = iframe.contentDocument || iframe.contentWindow).document || idoc;
     idoc.write("<script>parent._._object = { 'a': 1, 'b': 2, 'c': 3 };<\/script>");
     idoc.close();
@@ -130,7 +134,7 @@
 
   (function() {
     test('supports loading ' + basename + ' as the "lodash" module', function() {
-      if (window.define && define.amd) {
+      if (amd) {
         equal((lodashModule || {}).moduleName, 'lodash');
       } else {
         skipTest();
@@ -138,7 +142,7 @@
     });
 
     test('supports loading ' + basename + ' with the Require.js "shim" configuration option', function() {
-      if (window.define && define.amd) {
+      if (amd) {
         equal((shimmedModule || {}).moduleName, 'shimmed');
       } else {
         skipTest();
@@ -146,7 +150,7 @@
     });
 
     test('supports loading ' + basename + ' as the "underscore" module', function() {
-      if (window.define && define.amd) {
+      if (amd) {
         equal((underscoreModule || {}).moduleName, 'underscore');
       } else {
         skipTest();
@@ -154,7 +158,7 @@
     });
 
     test('avoids overwritten native methods', function() {
-      if (window.document && !window.phantom) {
+      if (document && !phantom) {
         notDeepEqual(lodashBadShim.keys({ 'a': 1 }), []);
       } else {
         skipTest();
@@ -342,7 +346,7 @@
     Klass.prototype = { 'b': 1 };
 
     var nonCloneable = {
-      'an element': window.document && document.body,
+      'an element': body,
       'a function': Klass
     };
 
@@ -1353,7 +1357,7 @@
 
   (function() {
     test('should use strict equality in its duck type check', function() {
-      var element = window.document ? document.body : { 'nodeType': 1 };
+      var element = body || { 'nodeType': 1 };
       strictEqual(_.isElement(element), true);
 
       strictEqual(_.isElement({ 'nodeType': new Number(1) }), false);
@@ -1557,9 +1561,20 @@
       strictEqual(_.isPlainObject(new Foo(1)), false);
       strictEqual(_.isPlainObject([1, 2, 3]), false);
       strictEqual(_.isPlainObject({ 'a': 1 }), true);
+
+      if (create) {
+        strictEqual(_.isPlainObject(create(null)), true);
+      } else {
+        skipTest();
+      }
+      if (document) {
+        strictEqual(_.isPlainObject(body), false);
+      } else {
+        skipTest();
+      }
     });
 
-    test('should return `false` for objects without a [[Class]] of "Object"', function() {
+    test('should return `false` for Object objects without a [[Class]] of "Object"', function() {
       strictEqual(_.isPlainObject(arguments), false);
       strictEqual(_.isPlainObject(Error), false);
       strictEqual(_.isPlainObject(Math), false);
@@ -1600,7 +1615,7 @@
       equal(typeof func(true), expected);
       equal(typeof func(false), expected);
       equal(typeof func(new Date), expected);
-      equal(typeof func(window.document && document.body), expected);
+      equal(typeof func(body), expected);
       equal(typeof func({}), expected);
       equal(typeof func(undefined), expected);
       equal(typeof func(Infinity), expected);
@@ -2905,10 +2920,9 @@
     });
 
     test('should work with a node list for `collection` (test in IE < 9)', function() {
-      if (window.document) {
+      if (document) {
         try {
           var nodeList = document.getElementsByTagName('body'),
-              body = nodeList[0],
               actual = _.toArray(nodeList);
         } catch(e) { }
         deepEqual(actual, [body]);
@@ -3475,7 +3489,7 @@
 
   // configure QUnit and call `QUnit.start()` for
   // Narwhal, Node.js, PhantomJS, Rhino, and RingoJS
-  if (!window.document || window.phantom) {
+  if (!document || phantom) {
     QUnit.config.noglobals = true;
     QUnit.start();
   }