diff --git a/source/object-model/observers.md b/source/object-model/observers.md
index 0ff5c5e01..b7b42a0eb 100644
--- a/source/object-model/observers.md
+++ b/source/object-model/observers.md
@@ -15,9 +15,9 @@ Person = Ember.Object.extend({
     return firstName + ' ' + lastName;
   }),
 
-  fullNameChanged: function() {
+  fullNameChanged: Ember.observer(function() {
     // deal with the change
-  }.observes('fullName').on('init')
+  }).on('init')
 });
 
 var person = Person.create({
@@ -40,12 +40,12 @@ is easy to introduce bugs where properties are not yet synchronized:
 
 ```javascript
 Person.reopen({
-  lastNameChanged: function() {
+  lastNameChanged: Ember.observer('lastName', function() {
     // The observer depends on lastName and so does fullName. Because observers
     // are synchronous, when this function is called the value of fullName is
     // not updated yet so this will log the old value of fullName
     console.log(this.get('fullName'));
-  }.observes('lastName')
+  })
 });
 ```
 
@@ -54,9 +54,9 @@ times when observing multiple properties:
 
 ```javascript
 Person.reopen({
-  partOfNameChanged: function() {
+  partOfNameChanged: Ember.observer('firstName', 'lastName', function() {
     // Because both firstName and lastName were set, this observer will fire twice.
-  }.observes('firstName', 'lastName')
+  })
 });
 
 person.set('firstName', 'John');
@@ -69,9 +69,9 @@ next run loop once all bindings are synchronized:
 
 ```javascript
 Person.reopen({
-  partOfNameChanged: function() {
+  partOfNameChanged: Ember.observer('firstName', 'lastName', function() {
     Ember.run.once(this, 'processFullName');
-  }.observes('firstName', 'lastName'),
+  }),
 
   processFullName: function() {
     // This will only fire once if you set two properties at the same time, and
@@ -98,9 +98,9 @@ Person = Ember.Object.extend({
     this.set('salutation', "Mr/Ms");
   },
 
-  salutationDidChange: function() {
+  salutationDidChange: Ember.observer('salutation', function() {
     // some side effect of salutation changing
-  }.observes('salutation').on('init')
+  }).on('init')
 });
 ```
 
@@ -118,20 +118,6 @@ observe it so you can update the DOM once the property changes.
 If you need to observe a computed property but aren't currently retrieving it,
 just get it in your init method.
 
-
-### Without prototype extensions
-
-You can define inline observers by using the `Ember.observer` method if you
-are using Ember without prototype extensions:
-
-```javascript
-Person.reopen({
-  fullNameChanged: Ember.observer('fullName', function() {
-    // deal with the change
-  })
-});
-```
-
 ### Outside of class definitions
 
 You can also add observers to an object outside of a class definition
diff --git a/source/testing/unit-testing-basics.md b/source/testing/unit-testing-basics.md
index 5f3b7bdea..a8df79d7f 100644
--- a/source/testing/unit-testing-basics.md
+++ b/source/testing/unit-testing-basics.md
@@ -114,9 +114,9 @@ Suppose we have an object that has a property and a method observing that proper
 export default Ember.Object.extend({
   foo: 'bar',
   other: 'no',
-  doSomething: function(){
+  doSomething: Ember.observer('foo', function(){
     this.set('other', 'yes');
-  }.observes('foo')
+  })
 });
 ```