diff --git a/README.md b/README.md
index f66900c..feecbff 100644
--- a/README.md
+++ b/README.md
@@ -105,6 +105,7 @@ See "Writing Tests" in https://github.com/intridea/grape.
 
 Enjoy :)
 
+
 ## Contributing
 
 1. Fork it
diff --git a/lib/grape-active_model_serializers/formatter.rb b/lib/grape-active_model_serializers/formatter.rb
index 53718c6..2346b61 100644
--- a/lib/grape-active_model_serializers/formatter.rb
+++ b/lib/grape-active_model_serializers/formatter.rb
@@ -3,15 +3,7 @@ module Grape
     module ActiveModelSerializers
       class << self
         def call(resource, env)
-          endpoint = env['api.endpoint']
-          options   = endpoint.namespace_options.merge(endpoint.route_options)
-
-          if resource.respond_to?(:to_ary) && !resource.empty?
-            # ensure we have an root to fallback on
-            endpoint.controller_name = resource.first.class.name.underscore.pluralize
-          end
-
-          serializer = ::ActiveModel::Serializer.build_json(endpoint, resource, options)
+          serializer = fetch_serializer(resource, env)
 
           if serializer
             serializer.to_json
@@ -19,6 +11,21 @@ module Grape
             Grape::Formatter::Json.call resource, env
           end
         end
+
+        def fetch_serializer(resource, env)
+          endpoint = env['api.endpoint']
+          options = build_options_from_endpoint(endpoint)
+
+          if resource.respond_to?(:to_ary) && !resource.empty?
+            # ensure we have an root to fallback on
+            endpoint.controller_name = resource.first.class.name.underscore.pluralize
+          end
+          ::ActiveModel::Serializer.build_json(endpoint, resource, options)
+        end
+
+        def build_options_from_endpoint(endpoint)
+          endpoint.namespace_options.merge(endpoint.route_options)
+        end
       end
     end
   end