diff --git a/src/browser/ReactBrowserEventEmitter.js b/src/browser/ReactBrowserEventEmitter.js
index 44353fdfcc..a3fa84f73e 100644
--- a/src/browser/ReactBrowserEventEmitter.js
+++ b/src/browser/ReactBrowserEventEmitter.js
@@ -126,7 +126,7 @@ var topEventMapping = {
 /**
  * To ensure no conflicts with other potential React instances on the page
  */
-var topListenersIDKey = "_reactListenersID" + String(Math.random()).slice(2);
+var topListenersIDKey = '_reactListenersID' + String(Math.random()).slice(2);
 
 function getListeningForDocument(mountAt) {
   // In IE8, `mountAt` is a host object and doesn't have `hasOwnProperty`
diff --git a/src/browser/eventPlugins/AnalyticsEventPluginFactory.js b/src/browser/eventPlugins/AnalyticsEventPluginFactory.js
index 074ec3bbaa..858e3d5525 100644
--- a/src/browser/eventPlugins/AnalyticsEventPluginFactory.js
+++ b/src/browser/eventPlugins/AnalyticsEventPluginFactory.js
@@ -152,7 +152,7 @@ function extractEvents(
     return null;
   }
 
-  var analyticsEventsArr = analyticsEventsStr.split(",");
+  var analyticsEventsArr = analyticsEventsStr.split(',');
   if (!analyticsData.hasOwnProperty(analyticsID)) {
     initAnalyticsDataForID(analyticsID, analyticsEventsArr);
   }
diff --git a/src/browser/ui/dom/Danger.js b/src/browser/ui/dom/Danger.js
index 2b4dcf6121..9dc56d278f 100644
--- a/src/browser/ui/dom/Danger.js
+++ b/src/browser/ui/dom/Danger.js
@@ -124,7 +124,7 @@ var Danger = {
 
         } else if (__DEV__) {
           console.error(
-            "Danger: Discarding unexpected node:",
+            'Danger: Discarding unexpected node:',
             renderNode
           );
         }
diff --git a/src/core/ReactCompositeComponent.js b/src/core/ReactCompositeComponent.js
index a45fb0b883..1c5112a439 100644
--- a/src/core/ReactCompositeComponent.js
+++ b/src/core/ReactCompositeComponent.js
@@ -746,7 +746,7 @@ var ReactCompositeComponentMixin = assign({},
       inst.shouldComponentUpdate(nextProps, nextState, nextContext);
 
     if (__DEV__) {
-      if (typeof shouldUpdate === "undefined") {
+      if (typeof shouldUpdate === 'undefined') {
         console.warn(
           (this.getName() || 'ReactCompositeComponent') +
           '.shouldComponentUpdate(): Returned undefined instead of a ' +
diff --git a/src/core/ReactUpdates.js b/src/core/ReactUpdates.js
index 9ed5ba0957..3bbb40215f 100644
--- a/src/core/ReactUpdates.js
+++ b/src/core/ReactUpdates.js
@@ -192,7 +192,7 @@ flushBatchedUpdates = ReactPerf.measure(
  */
 function enqueueUpdate(component, callback) {
   invariant(
-    !callback || typeof callback === "function",
+    !callback || typeof callback === 'function',
     'enqueueUpdate(...): You called `setProps`, `replaceProps`, ' +
     '`setState`, `replaceState`, or `forceUpdate` with a callback that ' +
     'isn\'t callable.'
diff --git a/src/utils/CallbackQueue.js b/src/utils/CallbackQueue.js
index 96b86ba3da..8268312993 100644
--- a/src/utils/CallbackQueue.js
+++ b/src/utils/CallbackQueue.js
@@ -60,7 +60,7 @@ assign(CallbackQueue.prototype, {
     if (callbacks) {
       invariant(
         callbacks.length === contexts.length,
-        "Mismatched list of contexts in callback queue"
+        'Mismatched list of contexts in callback queue'
       );
       this._callbacks = null;
       this._contexts = null;
diff --git a/src/utils/escapeTextForBrowser.js b/src/utils/escapeTextForBrowser.js
index 92416edf9a..8f8b435b39 100644
--- a/src/utils/escapeTextForBrowser.js
+++ b/src/utils/escapeTextForBrowser.js
@@ -13,11 +13,11 @@
 'use strict';
 
 var ESCAPE_LOOKUP = {
-  "&": "&",
-  ">": ">",
-  "<": "&lt;",
-  "\"": "&quot;",
-  "'": "&#x27;"
+  '&': '&amp;',
+  '>': '&gt;',
+  '<': '&lt;',
+  '"': '&quot;',
+  '\'': '&#x27;'
 };
 
 var ESCAPE_REGEX = /[&><"']/g;