diff --git a/src/addons/__tests__/update-test.js b/src/addons/__tests__/update-test.js
index 58120092a2..d36e427ca8 100644
--- a/src/addons/__tests__/update-test.js
+++ b/src/addons/__tests__/update-test.js
@@ -42,7 +42,7 @@ describe('update', function() {
     expect(update([1, 4, 3], {$splice: [[1, 1, 2]]})).toEqual([1, 2, 3]);
     expect(update.bind(null, [], {$splice: 1})).toThrow(
       'Invariant Violation: update(): expected spec of $splice to be an ' +
-      'array of arrays; got 1. Did you forget to wrap your parameters in an '+
+      'array of arrays; got 1. Did you forget to wrap your parameters in an ' +
       'array?'
     );
     expect(update.bind(null, [], {$splice: [1]})).toThrow(
diff --git a/src/browser/__tests__/findDOMNode-test.js b/src/browser/__tests__/findDOMNode-test.js
index f67ff6ef82..75e797d883 100644
--- a/src/browser/__tests__/findDOMNode-test.js
+++ b/src/browser/__tests__/findDOMNode-test.js
@@ -41,7 +41,7 @@ describe('findDOMNode', function() {
   });
 
   it('findDOMNode should reject unmounted objects with render func', function() {
-    expect(function() {React.findDOMNode({render: function(){}});})
+    expect(function() {React.findDOMNode({render: function() {}});})
       .toThrow('Invariant Violation: Component (with keys: render) ' +
         'contains `render` method but is not mounted in the DOM'
       );
diff --git a/src/browser/ui/__tests__/ReactDOMComponent-test.js b/src/browser/ui/__tests__/ReactDOMComponent-test.js
index 26054d91ad..2e179c9d52 100644
--- a/src/browser/ui/__tests__/ReactDOMComponent-test.js
+++ b/src/browser/ui/__tests__/ReactDOMComponent-test.js
@@ -213,7 +213,7 @@ describe('ReactDOMComponent', function() {
     var genMarkup;
 
     function quoteRegexp(str) {
-      return (str+'').replace(/([.?*+\^$\[\]\\(){}|-])/g, "\\$1");
+      return (str + '').replace(/([.?*+\^$\[\]\\(){}|-])/g, "\\$1");
     }
 
     beforeEach(function() {
@@ -266,7 +266,7 @@ describe('ReactDOMComponent', function() {
     var genMarkup;
 
     function quoteRegexp(str) {
-      return (str+'').replace(/([.?*+\^$\[\]\\(){}|-])/g, "\\$1");
+      return (str + '').replace(/([.?*+\^$\[\]\\(){}|-])/g, "\\$1");
     }
 
     beforeEach(function() {
@@ -491,7 +491,7 @@ describe('ReactDOMComponent', function() {
       var ReactTestUtils = require('ReactTestUtils');
 
       spyOn(console, 'warn');
-      ReactTestUtils.renderIntoDocument(<div onScroll={function(){}} />);
+      ReactTestUtils.renderIntoDocument(<div onScroll={function() {}} />);
       expect(console.warn.calls.length).toBe(1);
       expect(console.warn.mostRecentCall.args[0]).toBe(
         'Warning: This browser doesn\'t support the `onScroll` event'
diff --git a/src/core/__tests__/ReactCompositeComponent-test.js b/src/core/__tests__/ReactCompositeComponent-test.js
index 0917f69640..ac6482a910 100644
--- a/src/core/__tests__/ReactCompositeComponent-test.js
+++ b/src/core/__tests__/ReactCompositeComponent-test.js
@@ -623,8 +623,8 @@ describe('ReactCompositeComponent', function() {
 
     expect(console.warn.argsForCall.length).toBe(1);
     expect(console.warn.argsForCall[0][0]).toBe(
-      'Warning: owner-based and parent-based contexts differ '+
-      '(values: `bar` vs `undefined`) for key (foo) '+
+      'Warning: owner-based and parent-based contexts differ ' +
+      '(values: `bar` vs `undefined`) for key (foo) ' +
       'while mounting Component (see: http://fb.me/react-context-by-parent)'
     );
 
diff --git a/src/core/__tests__/ReactCompositeComponentNestedState-test.js b/src/core/__tests__/ReactCompositeComponentNestedState-test.js
index cd4958a35c..f886d2ffb8 100644
--- a/src/core/__tests__/ReactCompositeComponentNestedState-test.js
+++ b/src/core/__tests__/ReactCompositeComponentNestedState-test.js
@@ -109,7 +109,7 @@ describe('ReactCompositeComponentNestedState-state', function() {
       [ 'setState-args', 'dark blue', 'green' ],
       [ 'render', 'light green', 'green' ],
       [ 'parent-after-setState', 'green' ],
-      [ 'after-setState', 'light green', 'green' ],
+      [ 'after-setState', 'light green', 'green' ]
     ]);
   });
 });
diff --git a/src/core/__tests__/ReactMultiChildReconcile-test.js b/src/core/__tests__/ReactMultiChildReconcile-test.js
index ebbe661d83..135cacb14a 100644
--- a/src/core/__tests__/ReactMultiChildReconcile-test.js
+++ b/src/core/__tests__/ReactMultiChildReconcile-test.js
@@ -192,7 +192,7 @@ function verifyDomOrderingAccurate(parentInstance, statusDisplays) {
   var statusDisplayNodes = containerNode.childNodes;
   var i;
   var orderedDomIds = [];
-  for (i=0; i < statusDisplayNodes.length; i++) {
+  for (i = 0; i < statusDisplayNodes.length; i++) {
     orderedDomIds.push(ReactMount.getID(statusDisplayNodes[i]));
   }
 
diff --git a/src/core/__tests__/refs-destruction-test.js b/src/core/__tests__/refs-destruction-test.js
index efa78d75e5..20d32270c8 100644
--- a/src/core/__tests__/refs-destruction-test.js
+++ b/src/core/__tests__/refs-destruction-test.js
@@ -13,7 +13,7 @@
 
 var React = require('React');
 var ReactTestUtils = require('ReactTestUtils');
-var reactComponentExpect= require('reactComponentExpect');
+var reactComponentExpect = require('reactComponentExpect');
 
 var TestComponent = React.createClass({
   render: function() {
diff --git a/src/core/__tests__/refs-test.js b/src/core/__tests__/refs-test.js
index d0e279fd0c..e565d767aa 100644
--- a/src/core/__tests__/refs-test.js
+++ b/src/core/__tests__/refs-test.js
@@ -14,7 +14,7 @@
 var React = require('React');
 var ReactTestUtils = require('ReactTestUtils');
 
-var reactComponentExpect= require('reactComponentExpect');
+var reactComponentExpect = require('reactComponentExpect');
 
 
 /**
@@ -34,7 +34,7 @@ var ClickCounter = React.createClass({
   render: function() {
     var children = [];
     var i;
-    for (i=0; i < this.state.count; i++) {
+    for (i = 0; i < this.state.count; i++) {
       children.push(
         <div
           className="clickLogDiv"
diff --git a/src/test/ReactTestUtils.js b/src/test/ReactTestUtils.js
index 8253499d09..4c5695b8e2 100644
--- a/src/test/ReactTestUtils.js
+++ b/src/test/ReactTestUtils.js
@@ -170,7 +170,7 @@ var ReactTestUtils = {
     var all =
       ReactTestUtils.scryRenderedDOMComponentsWithClass(root, className);
     if (all.length !== 1) {
-      throw new Error('Did not find exactly one match '+
+      throw new Error('Did not find exactly one match ' +
         '(found: ' + all.length + ') for class:' + className
       );
     }
diff --git a/src/test/worker.js b/src/test/worker.js
index 1805e33b02..50104457ad 100644
--- a/src/test/worker.js
+++ b/src/test/worker.js
@@ -3,14 +3,14 @@
 
 if (typeof console == 'undefined') {
   this.console = {
-    error: function(e){
+    error: function(e) {
       postMessage(JSON.stringify({
         type: 'error',
         message: e.message,
         stack: e.stack
       }));
     },
-    log: function(message){
+    log: function(message) {
       postMessage(JSON.stringify({
         type: 'log',
         message: message
diff --git a/src/utils/__tests__/OrderedMap-test.js b/src/utils/__tests__/OrderedMap-test.js
index e469322b1b..914417606a 100644
--- a/src/utils/__tests__/OrderedMap-test.js
+++ b/src/utils/__tests__/OrderedMap-test.js
@@ -78,7 +78,7 @@ var hasUndefinedStringKey = [
 var hasPositiveNumericKey = [
   {uniqueID: 'notANumber', data: []},
   {uniqueID: '5', data: []},
-  {uniqueID: 'notAnotherNumber',data: []}
+  {uniqueID: 'notAnotherNumber', data: []}
 ];
 
 var hasZeroStringKey = [
diff --git a/src/utils/__tests__/traverseAllChildren-test.js b/src/utils/__tests__/traverseAllChildren-test.js
index 91b51f0292..84feb171f7 100644
--- a/src/utils/__tests__/traverseAllChildren-test.js
+++ b/src/utils/__tests__/traverseAllChildren-test.js
@@ -351,7 +351,7 @@ describe('traverseAllChildren', function() {
         return {
           next: function() {
             if (i++ < 3) {
-              return { value: <div key={'#'+i} />, done: false };
+              return { value: <div key={'#' + i} />, done: false };
             } else {
               return { value: undefined, done: true };
             }
@@ -402,7 +402,7 @@ describe('traverseAllChildren', function() {
         return {
           next: function() {
             if (i++ < 3) {
-              return { value: ['#'+i, <div />], done: false };
+              return { value: ['#' + i, <div />], done: false };
             } else {
               return { value: undefined, done: true };
             }