diff --git a/Gemfile b/Gemfile
index c19f7552..df30fcd0 100644
--- a/Gemfile
+++ b/Gemfile
@@ -4,3 +4,4 @@ source 'http://rubygems.org'
 gemspec
 
 gem "pry"
+gem "simplecov", :require => false
diff --git a/lib/action_controller/serialization.rb b/lib/action_controller/serialization.rb
index ebcc9c20..583309fa 100644
--- a/lib/action_controller/serialization.rb
+++ b/lib/action_controller/serialization.rb
@@ -42,7 +42,8 @@ module ActionController
       end
 
       if json.respond_to?(:active_model_serializer) && (serializer = json.active_model_serializer)
-        json = serializer.new(json, serialization_scope, options)
+        options[:scope] = serialization_scope
+        json = serializer.new(json, options)
       end
       super
     end
diff --git a/lib/active_model/serializer.rb b/lib/active_model/serializer.rb
index 1ba94bec..17b53088 100644
--- a/lib/active_model/serializer.rb
+++ b/lib/active_model/serializer.rb
@@ -5,18 +5,18 @@ module ActiveModel
   # Active Model Array Serializer
   #
   # It serializes an array checking if each element that implements
-  # the +active_model_serializer+ method passing down the current scope.
+  # the +active_model_serializer+ method.
   class ArraySerializer
-    attr_reader :object, :scope
+    attr_reader :object
 
-    def initialize(object, scope, options={})
-      @object, @scope, @options = object, scope, options
+    def initialize(object, options={})
+      @object, @options = object, options
     end
 
     def serializable_array
       @object.map do |item|
         if item.respond_to?(:active_model_serializer) && (serializer = item.active_model_serializer)
-          serializer.new(item, scope, @options)
+          serializer.new(item, @options)
         else
           item
         end
@@ -40,12 +40,13 @@ module ActiveModel
   #
   # Provides a basic serializer implementation that allows you to easily
   # control how a given object is going to be serialized. On initialization,
-  # it expects to object as arguments, a resource and a scope. For example,
+  # it expects to object as arguments, a resource and options. For example,
   # one may do in a controller:
   #
-  #     PostSerializer.new(@post, current_user).to_json
+  #     PostSerializer.new(@post, :scope => current_user).to_json
   #
-  # The object to be serialized is the +@post+ and the scope is +current_user+.
+  # The object to be serialized is the +@post+ and the current user is passed
+  # in for authorization purposes.
   #
   # We use the scope to check if a given attribute should be serialized or not.
   # For example, some attributes maybe only be returned if +current_user+ is the
@@ -127,10 +128,6 @@ module ActiveModel
           option(:value) || source_serializer.send(name)
         end
 
-        def scope
-          option(:scope) || source_serializer.scope
-        end
-
         def embed_ids?
           option(:embed, source_serializer._embed) == :ids
         end
@@ -147,9 +144,9 @@ module ActiveModel
 
         def find_serializable(object)
           if target_serializer
-            target_serializer.new(object, scope, source_serializer.options)
+            target_serializer.new(object, source_serializer.options)
           elsif object.respond_to?(:active_model_serializer) && (ams = object.active_model_serializer)
-            ams.new(object, scope, source_serializer.options)
+            ams.new(object, source_serializer.options)
           else
             object
           end
@@ -343,10 +340,10 @@ module ActiveModel
       end
     end
 
-    attr_reader :object, :scope, :options
+    attr_reader :object, :options
 
-    def initialize(object, scope, options={})
-      @object, @scope, @options = object, scope, options
+    def initialize(object, options={})
+      @object, @options = object, options
     end
 
     # Returns a json representation of the serializable
diff --git a/test/association_test.rb b/test/association_test.rb
index b8687b33..31b6175c 100644
--- a/test/association_test.rb
+++ b/test/association_test.rb
@@ -43,7 +43,7 @@ class AssociationTest < ActiveModel::TestCase
       attributes :title, :body
     end
 
-    @post_serializer = @post_serializer_class.new(@post, nil)
+    @post_serializer = @post_serializer_class.new(@post)
 
     @hash = {}
     @root_hash = {}
@@ -321,7 +321,7 @@ class AssociationTest < ActiveModel::TestCase
 
     def test_when_it_is_included
       post_serializer = @post_serializer_class.new(
-        @post, nil, :include => [:comments]
+        @post, :include => [:comments]
       )
 
       json = post_serializer.as_json
@@ -340,7 +340,7 @@ class AssociationTest < ActiveModel::TestCase
 
     def test_when_it_is_not_included
       post_serializer = @post_serializer_class.new(
-        @post, nil, :include => []
+        @post, :include => []
       )
 
       json = post_serializer.as_json
@@ -356,7 +356,7 @@ class AssociationTest < ActiveModel::TestCase
 
     def test_when_it_is_excluded
       post_serializer = @post_serializer_class.new(
-        @post, nil, :exclude => [:comments]
+        @post, :exclude => [:comments]
       )
 
       json = post_serializer.as_json
@@ -372,7 +372,7 @@ class AssociationTest < ActiveModel::TestCase
 
     def test_when_it_is_not_excluded
       post_serializer = @post_serializer_class.new(
-        @post, nil, :exclude => []
+        @post, :exclude => []
       )
 
       json = post_serializer.as_json
diff --git a/test/serialization_test.rb b/test/serialization_test.rb
index c807fcc5..e930f476 100644
--- a/test/serialization_test.rb
+++ b/test/serialization_test.rb
@@ -15,12 +15,12 @@ class RenderJsonTest < ActionController::TestCase
   end
 
   class JsonSerializer
-    def initialize(object, scope, options={})
-      @object, @scope, @options = object, scope, options
+    def initialize(object, options={})
+      @object, @options = object, options
     end
 
     def as_json(*)
-      hash = { :object => serializable_hash, :scope => @scope.as_json }
+      hash = { :object => serializable_hash, :scope => @options[:scope].as_json }
       hash.merge!(:options => true) if @options[:options]
       hash
     end
diff --git a/test/serializer_test.rb b/test/serializer_test.rb
index bc9a18bd..c5cf5b86 100644
--- a/test/serializer_test.rb
+++ b/test/serializer_test.rb
@@ -52,7 +52,7 @@ class SerializerTest < ActiveModel::TestCase
     attributes :first_name, :last_name
 
     def serializable_hash
-      attributes.merge(:ok => true).merge(scope)
+      attributes.merge(:ok => true).merge(options[:scope])
     end
   end
 
@@ -107,7 +107,7 @@ class SerializerTest < ActiveModel::TestCase
 
   def test_attributes_method
     user = User.new
-    user_serializer = UserSerializer.new(user, {})
+    user_serializer = UserSerializer.new(user, :scope => {})
 
     hash = user_serializer.as_json
 
@@ -118,7 +118,7 @@ class SerializerTest < ActiveModel::TestCase
 
   def test_serializer_receives_scope
     user = User.new
-    user_serializer = UserSerializer.new(user, {:scope => true})
+    user_serializer = UserSerializer.new(user, :scope => {:scope => true})
 
     hash = user_serializer.as_json
 
@@ -135,7 +135,7 @@ class SerializerTest < ActiveModel::TestCase
   def test_pretty_accessors
     user = User.new
     user.superuser = true
-    user_serializer = MyUserSerializer.new(user, nil)
+    user_serializer = MyUserSerializer.new(user)
 
     hash = user_serializer.as_json
 
@@ -153,7 +153,7 @@ class SerializerTest < ActiveModel::TestCase
     comments = [Comment.new(:title => "Comment1"), Comment.new(:title => "Comment2")]
     post.comments = comments
 
-    post_serializer = PostSerializer.new(post, user)
+    post_serializer = PostSerializer.new(post, :scope => user)
 
     assert_equal({
       :post => {
@@ -184,7 +184,7 @@ class SerializerTest < ActiveModel::TestCase
     blog = Blog.new
     blog.author = user
 
-    json = BlogSerializer.new(blog, user).as_json
+    json = BlogSerializer.new(blog, :scope => user).as_json
     assert_equal({
       :blog => {
         :author => {
@@ -212,7 +212,7 @@ class SerializerTest < ActiveModel::TestCase
     blog = Blog.new
     blog.author = user
 
-    json = blog_serializer.new(blog, user).as_json
+    json = blog_serializer.new(blog, :scope => user).as_json
     assert_equal({
       :person => {
         :first_name => "Jose"
@@ -232,7 +232,7 @@ class SerializerTest < ActiveModel::TestCase
     user = User.new
     blog = Blog.new
 
-    json = BlogSerializer.new(blog, user).as_json
+    json = BlogSerializer.new(blog, :scope => user).as_json
     assert_equal({
       :blog => { :author => nil }
     }, json)
@@ -241,7 +241,7 @@ class SerializerTest < ActiveModel::TestCase
       root :blog
     end
 
-    json = serializer.new(blog, user).as_json
+    json = serializer.new(blog, :scope => user).as_json
     assert_equal({ :blog =>  { :author => nil } }, json)
   end
 
@@ -253,7 +253,7 @@ class SerializerTest < ActiveModel::TestCase
       root :my_blog
     end
 
-    assert_equal({ :my_blog => { :author => nil } }, serializer.new(blog, user).as_json)
+    assert_equal({ :my_blog => { :author => nil } }, serializer.new(blog, :scope => user).as_json)
   end
 
   def test_false_root
@@ -264,11 +264,11 @@ class SerializerTest < ActiveModel::TestCase
       root false
     end
 
-    assert_equal({ :author => nil }, serializer.new(blog, user).as_json)
+    assert_equal({ :author => nil }, serializer.new(blog, :scope => user).as_json)
 
     # test inherited false root
     serializer = Class.new(serializer)
-    assert_equal({ :author => nil }, serializer.new(blog, user).as_json)
+    assert_equal({ :author => nil }, serializer.new(blog, :scope => user).as_json)
   end
 
   def test_embed_ids
@@ -283,7 +283,7 @@ class SerializerTest < ActiveModel::TestCase
     comments = [Comment.new(:title => "Comment1", :id => 1), Comment.new(:title => "Comment2", :id => 2)]
     post.comments = comments
 
-    serializer = serializer.new(post, nil)
+    serializer = serializer.new(post)
 
     assert_equal({
       :post => {
@@ -307,7 +307,7 @@ class SerializerTest < ActiveModel::TestCase
     comments = [Comment.new(:title => "Comment1", :id => 1), Comment.new(:title => "Comment2", :id => 2)]
     post.comments = comments
 
-    serializer = serializer_class.new(post, nil)
+    serializer = serializer_class.new(post)
 
     assert_equal({
       :post => {
@@ -325,7 +325,7 @@ class SerializerTest < ActiveModel::TestCase
 
     post.author = User.new(:id => 1)
 
-    serializer = serializer_class.new(post, nil)
+    serializer = serializer_class.new(post)
 
     assert_equal({
       :post => {
@@ -354,7 +354,7 @@ class SerializerTest < ActiveModel::TestCase
     comments = [Comment.new(:title => "Comment1", :id => 1), Comment.new(:title => "Comment2", :id => 2)]
     post.comments = comments
 
-    serializer = serializer.new(post, nil)
+    serializer = serializer.new(post)
 
     assert_equal({
       :post => {
@@ -389,7 +389,7 @@ class SerializerTest < ActiveModel::TestCase
 
     array = [ comment1, comment2 ]
 
-    serializer = array.active_model_serializer.new(array, nil, :root => :comments)
+    serializer = array.active_model_serializer.new(array, :root => :comments)
 
     assert_equal({ :comments => [
       { :title => "Comment1" },
@@ -417,7 +417,7 @@ class SerializerTest < ActiveModel::TestCase
     custom_blog.public_posts = posts
     custom_blog.public_user = user
 
-    serializer = CustomBlogSerializer.new(custom_blog, :scope => true)
+    serializer = CustomBlogSerializer.new(custom_blog, :scope => { :scope => true })
 
     assert_equal({
       :custom_blog => {
@@ -454,7 +454,7 @@ class SerializerTest < ActiveModel::TestCase
     custom_blog.public_posts = posts
     custom_blog.public_user = user
 
-    serializer = implicit_serializer.new(custom_blog, :scope => true)
+    serializer = implicit_serializer.new(custom_blog, :scope => { :scope => true })
 
     assert_equal({
       :custom_blog => {
@@ -480,7 +480,7 @@ class SerializerTest < ActiveModel::TestCase
       attribute :password
     end
 
-    serializer = serializer_class.new(User.new, nil)
+    serializer = serializer_class.new(User.new)
 
     assert_equal({
       :user => {
@@ -575,7 +575,7 @@ class SerializerTest < ActiveModel::TestCase
     author = author_class.new(:id => 5)
     post.author = author
 
-    hash = serializer_class.new(post, nil)
+    hash = serializer_class.new(post)
 
     assert_equal({
       :post => {
@@ -608,7 +608,7 @@ class SerializerTest < ActiveModel::TestCase
     author = author_class.new(:id => 5, :name => "Tom Dale")
     post.author = author
 
-    hash = serializer_class.new(post, nil)
+    hash = serializer_class.new(post)
 
     assert_equal({
       :post => {
@@ -647,13 +647,13 @@ class SerializerTest < ActiveModel::TestCase
         :body => "It's a new post!",
         :author => { :id => 5, :name => "Tom Dale" }
       }
-    }, serializer_class.new(post, nil, :root => :blog_post).as_json)
+    }, serializer_class.new(post, :root => :blog_post).as_json)
 
     assert_equal({
       :title => "New Post",
       :body => "It's a new post!",
       :author => { :id => 5, :name => "Tom Dale" }
-    }, serializer_class.new(post, nil, :root => false).as_json)
+    }, serializer_class.new(post, :root => false).as_json)
 
     assert_equal({
       :blog_post => {
@@ -661,13 +661,13 @@ class SerializerTest < ActiveModel::TestCase
         :body => "It's a new post!",
         :author => { :id => 5, :name => "Tom Dale" }
       }
-    }, serializer_class.new(post, nil).as_json(:root => :blog_post))
+    }, serializer_class.new(post).as_json(:root => :blog_post))
 
     assert_equal({
       :title => "New Post",
       :body => "It's a new post!",
       :author => { :id => 5, :name => "Tom Dale" }
-    }, serializer_class.new(post, nil).as_json(:root => false))
+    }, serializer_class.new(post).as_json(:root => false))
   end
 
   def test_serializer_has_access_to_root_object
@@ -699,7 +699,7 @@ class SerializerTest < ActiveModel::TestCase
     author = author_class.new(:id => 5, :name => "Tom Dale")
     post.author = author
 
-    expected = serializer_class.new(post, nil).as_json
+    expected = serializer_class.new(post).as_json
     assert_equal expected, hash_object
   end
 
@@ -747,7 +747,7 @@ class SerializerTest < ActiveModel::TestCase
     comment1.tags = [tag1, tag3]
     comment2.tags = [tag1, tag2]
 
-    actual = ActiveModel::ArraySerializer.new([post], nil, :root => :posts).as_json
+    actual = ActiveModel::ArraySerializer.new([post], :root => :posts).as_json
     assert_equal({
       :posts => [
         { :title => "New Post", :body => "NEW POST", :id => 1, :comments => [1,2] }
diff --git a/test/test_helper.rb b/test/test_helper.rb
index 689d8bfa..ceede0cc 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -1,5 +1,14 @@
 require "rubygems"
 require "bundler/setup"
+
+unless ENV["TRAVIS"]
+  require 'simplecov'
+  SimpleCov.start do
+    add_group "lib", "lib"
+    add_group "spec", "spec"
+  end
+end
+
 require "pry"
 
 require "active_model_serializers"