diff --git a/lib/active_model/serializer.rb b/lib/active_model/serializer.rb
index 7ec17576..c9ad5639 100644
--- a/lib/active_model/serializer.rb
+++ b/lib/active_model/serializer.rb
@@ -99,7 +99,7 @@ module ActiveModel
   #       end
   #
   #       def author?
-  #         post.author == scope
+  #         post.author == options[:scope]
   #       end
   #     end
   #
diff --git a/test/serializer_test.rb b/test/serializer_test.rb
index 6e576d17..06593b06 100644
--- a/test/serializer_test.rb
+++ b/test/serializer_test.rb
@@ -71,8 +71,8 @@ class SerializerTest < ActiveModel::TestCase
   end
 
   class CommentSerializer
-    def initialize(comment, scope, options={})
-      @comment, @scope = comment, scope
+    def initialize(comment, options={})
+      @comment = comment
     end
 
     def serializable_hash