diff --git a/lib/api/decorators/collection.rb b/lib/api/decorators/collection.rb
index 49fb6d9f7e..5c4dcffbfc 100644
--- a/lib/api/decorators/collection.rb
+++ b/lib/api/decorators/collection.rb
@@ -35,23 +35,30 @@ module API
     class Collection < Roar::Decorator
       include Roar::JSON::HAL
       include Roar::Hypermedia
-      include OpenProject::StaticRouting::UrlHelpers
+      include API::Utilities::UrlHelper
 
-      attr_reader :current_user, :as
+      def initialize(models, total, self_link, decorator)
+        @total = total
+        @self_link = self_link
+        @decorator = decorator
 
-      def initialize(models, current_user: nil, as: nil)
-        @current_user = current_user
-        @as = as.to_s.camelize(:lower)
         super(models)
       end
 
       as_strategy = API::Utilities::CamelCasingStrategy.new
 
-      property :total, as: :_total, exec_context: :decorator
-
-      def total
-        represented.empty? ? 0 : represented.first.class.count
+      link :self do
+        { href: "#{root_path}api/v3/#{@self_link}" }
       end
+
+      property :_type, getter: -> (*) { 'Collection' }
+      property :total, getter: -> (*) { @total }, exec_context: :decorator
+      property :count, getter: -> (*) { empty? ? 0 : count }
+
+      collection :elements,
+                 getter: -> (*) { represented.map { |model| @decorator.new(model) } },
+                 exec_context: :decorator,
+                 embedded: true
     end
   end
 end
diff --git a/lib/api/v3/categories/categories_api.rb b/lib/api/v3/categories/categories_api.rb
index 05426e5b7a..94d6d227f0 100644
--- a/lib/api/v3/categories/categories_api.rb
+++ b/lib/api/v3/categories/categories_api.rb
@@ -37,7 +37,9 @@ module API
           end
 
           get do
-            CategoryCollectionRepresenter.new(@categories, project: @project)
+            CategoryCollectionRepresenter.new(@categories,
+                                              @categories.count,
+                                              "projects/#{@project.identifier}/categories")
           end
         end
       end
diff --git a/lib/api/v3/categories/category_collection_representer.rb b/lib/api/v3/categories/category_collection_representer.rb
index 24d1cf74f5..718b736fc9 100644
--- a/lib/api/v3/categories/category_collection_representer.rb
+++ b/lib/api/v3/categories/category_collection_representer.rb
@@ -34,29 +34,9 @@ require 'roar/json/hal'
 module API
   module V3
     module Categories
-      class CategoryCollectionRepresenter < Roar::Decorator
-        include Roar::JSON::HAL
-        include OpenProject::StaticRouting::UrlHelpers
-
-        self.as_strategy = API::Utilities::CamelCasingStrategy.new
-
-        attr_reader :project
-
-        def initialize(model, project:)
-          @project = project
-          super(model)
-        end
-
-        link :self do
-          "#{root_path}api/v3/projects/#{project.id}/categories"
-        end
-
-        property :_type, exec_context: :decorator
-
-        collection :categories, embedded: true, extend: CategoryRepresenter, getter: ->(_) { self }
-
-        def _type
-          'Categories'
+      class CategoryCollectionRepresenter < ::API::Decorators::Collection
+        def initialize(models, total, self_link)
+          super(models, total, self_link, ::API::V3::Categories::CategoryRepresenter)
         end
       end
     end
diff --git a/lib/api/v3/priorities/priorities_api.rb b/lib/api/v3/priorities/priorities_api.rb
index 2d43c64e54..98d9c60238 100644
--- a/lib/api/v3/priorities/priorities_api.rb
+++ b/lib/api/v3/priorities/priorities_api.rb
@@ -37,7 +37,9 @@ module API
           end
 
           get do
-            PriorityCollectionRepresenter.new(@priorities)
+            PriorityCollectionRepresenter.new(@priorities,
+                                              @priorities.count,
+                                              'priorities')
           end
         end
       end
diff --git a/lib/api/v3/priorities/priority_collection_representer.rb b/lib/api/v3/priorities/priority_collection_representer.rb
index 31d4843d05..40387d5df5 100644
--- a/lib/api/v3/priorities/priority_collection_representer.rb
+++ b/lib/api/v3/priorities/priority_collection_representer.rb
@@ -34,22 +34,9 @@ require 'roar/json/hal'
 module API
   module V3
     module Priorities
-      class PriorityCollectionRepresenter < Roar::Decorator
-        include Roar::JSON::HAL
-        include OpenProject::StaticRouting::UrlHelpers
-
-        self.as_strategy = API::Utilities::CamelCasingStrategy.new
-
-        link :self do
-          "#{root_path}api/v3/priorities"
-        end
-
-        property :_type, exec_context: :decorator
-
-        collection :priorities, embedded: true, extend: PriorityRepresenter, getter: ->(_) { self }
-
-        def _type
-          'Priorities'
+      class PriorityCollectionRepresenter < ::API::Decorators::Collection
+        def initialize(models, total, self_link)
+          super(models, total, self_link, ::API::V3::Priorities::PriorityRepresenter)
         end
       end
     end
diff --git a/lib/api/v3/statuses/status_collection_representer.rb b/lib/api/v3/statuses/status_collection_representer.rb
index 2daa171873..5550d28bbf 100644
--- a/lib/api/v3/statuses/status_collection_representer.rb
+++ b/lib/api/v3/statuses/status_collection_representer.rb
@@ -34,22 +34,9 @@ require 'roar/json/hal'
 module API
   module V3
     module Statuses
-      class StatusCollectionRepresenter < Roar::Decorator
-        include Roar::JSON::HAL
-        include OpenProject::StaticRouting::UrlHelpers
-
-        self.as_strategy = API::Utilities::CamelCasingStrategy.new
-
-        link :self do
-          "#{root_path}api/v3/statuses"
-        end
-
-        property :_type, exec_context: :decorator
-
-        collection :statuses, embedded: true, extend: StatusRepresenter, getter: ->(_) { self }
-
-        def _type
-          'Statuses'
+      class StatusCollectionRepresenter < ::API::Decorators::Collection
+        def initialize(models, total, self_link)
+          super(models, total, self_link, ::API::V3::Statuses::StatusRepresenter)
         end
       end
     end
diff --git a/lib/api/v3/statuses/statuses_api.rb b/lib/api/v3/statuses/statuses_api.rb
index dabca0507a..14b802a517 100644
--- a/lib/api/v3/statuses/statuses_api.rb
+++ b/lib/api/v3/statuses/statuses_api.rb
@@ -37,7 +37,9 @@ module API
           end
 
           get do
-            StatusCollectionRepresenter.new(@statuses)
+            StatusCollectionRepresenter.new(@statuses,
+                                            @statuses.count,
+                                            'statuses')
           end
 
           namespace ':id' do
diff --git a/lib/api/v3/users/user_collection_representer.rb b/lib/api/v3/users/user_collection_representer.rb
index 827cee098e..54503b609f 100644
--- a/lib/api/v3/users/user_collection_representer.rb
+++ b/lib/api/v3/users/user_collection_representer.rb
@@ -31,10 +31,8 @@ module API
   module V3
     module Users
       class UserCollectionRepresenter < ::API::Decorators::Collection
-        collection :users, as: -> (*) { as || :users }, exec_context: :decorator, embedded: true
-
-        def users
-          represented.map { |model| ::API::V3::Users::UserRepresenter.new(model) }
+        def initialize(models, total, self_link)
+          super(models, total, self_link, ::API::V3::Users::UserRepresenter)
         end
       end
     end
diff --git a/lib/api/v3/versions/version_collection_representer.rb b/lib/api/v3/versions/version_collection_representer.rb
index 70997bb8e6..d2ae25e839 100644
--- a/lib/api/v3/versions/version_collection_representer.rb
+++ b/lib/api/v3/versions/version_collection_representer.rb
@@ -34,29 +34,9 @@ require 'roar/json/hal'
 module API
   module V3
     module Versions
-      class VersionCollectionRepresenter < Roar::Decorator
-        include Roar::JSON::HAL
-        include OpenProject::StaticRouting::UrlHelpers
-
-        self.as_strategy = API::Utilities::CamelCasingStrategy.new
-
-        attr_reader :project
-
-        def initialize(model, project:)
-          @project = project
-          super(model)
-        end
-
-        link :self do
-          "#{root_path}api/v3/projects/#{project.id}/versions"
-        end
-
-        property :_type, exec_context: :decorator
-
-        collection :versions, embedded: true, extend: VersionRepresenter, getter: ->(_) { self }
-
-        def _type
-          'Versions'
+      class VersionCollectionRepresenter < ::API::Decorators::Collection
+        def initialize(models, total, self_link)
+          super(models, total, self_link, ::API::V3::Versions::VersionRepresenter)
         end
       end
     end
diff --git a/lib/api/v3/versions/versions_api.rb b/lib/api/v3/versions/versions_api.rb
index d994b72163..09ce80a324 100644
--- a/lib/api/v3/versions/versions_api.rb
+++ b/lib/api/v3/versions/versions_api.rb
@@ -37,7 +37,9 @@ module API
           end
 
           get do
-            VersionCollectionRepresenter.new(@versions, project: @project)
+            VersionCollectionRepresenter.new(@versions,
+                                             @versions.count,
+                                             "projects/#{@project.identifier}/versions")
           end
         end
       end
diff --git a/lib/api/v3/work_packages/work_packages_api.rb b/lib/api/v3/work_packages/work_packages_api.rb
index 6a221e6529..b6343d3c35 100644
--- a/lib/api/v3/work_packages/work_packages_api.rb
+++ b/lib/api/v3/work_packages/work_packages_api.rb
@@ -133,7 +133,11 @@ module API
                   || authorize(:edit_work_packages, context: @work_package.project)
 
                 available_assignees = @work_package.assignable_assignees
-                ::API::V3::Users::UserCollectionRepresenter.new(available_assignees, as: :available_assignees)
+                total = available_assignees.count
+                self_link = "work_packages/#{@work_package.id}/available_assignees"
+                ::API::V3::Users::UserCollectionRepresenter.new(available_assignees,
+                                                                total,
+                                                                self_link)
               end
 
             end
@@ -145,13 +149,16 @@ module API
                   || authorize(:edit_work_packages, context: @work_package.project)
 
                 available_responsibles = @work_package.assignable_responsibles
-                ::API::V3::Users::UserCollectionRepresenter.new(available_responsibles, as: :available_responsibles)
+                total = available_responsibles.count
+                self_link = "work_packages/#{@work_package.id}/available_responsibles"
+                ::API::V3::Users::UserCollectionRepresenter.new(available_responsibles,
+                                                                total,
+                                                                self_link)
               end
 
             end
 
             mount ::API::V3::WorkPackages::WatchersAPI
-            mount ::API::V3::WorkPackages::StatusesAPI
             mount ::API::V3::Relations::RelationsAPI
             mount ::API::V3::WorkPackages::Form::FormAPI
 
diff --git a/spec/lib/api/v3/categories/category_collection_representer_spec.rb b/spec/lib/api/v3/categories/category_collection_representer_spec.rb
index 8df045c724..2d3587c8b7 100644
--- a/spec/lib/api/v3/categories/category_collection_representer_spec.rb
+++ b/spec/lib/api/v3/categories/category_collection_representer_spec.rb
@@ -29,33 +29,12 @@
 require 'spec_helper'
 
 describe ::API::V3::Categories::CategoryCollectionRepresenter do
-  let(:project)    { FactoryGirl.build(:project, id: 888) }
   let(:categories) { FactoryGirl.build_list(:category, 3) }
-  let(:representer) { described_class.new(categories, project: project) }
-
-  describe '#initialize' do
-    context 'with incorrect parameters' do
-      it 'should raise without a project' do
-        expect { described_class.new(categories) }.to raise_error(ArgumentError)
-      end
-    end
-  end
+  let(:representer) { described_class.new(categories, 42, 'projects/1/categories') }
 
   context 'generation' do
-    subject(:generated) { representer.to_json }
-
-    it { should include_json('Categories'.to_json).at_path('_type') }
-
-    it { should have_json_type(Object).at_path('_links') }
-    it 'should link to self' do
-      expect(generated).to have_json_path('_links/self/href')
-      expect(parse_json(generated, '_links/self/href')).to match %r{/api/v3/projects/888/categories$}
-    end
+    subject(:collection) { representer.to_json }
 
-    describe 'categories' do
-      it { should have_json_path('_embedded/categories') }
-      it { should have_json_size(3).at_path('_embedded/categories') }
-      it { should have_json_path('_embedded/categories/2/name') }
-    end
+    it_behaves_like 'API V3 collection decorated', 42, 3, 'projects/1/categories', 'Category'
   end
 end
diff --git a/spec/lib/api/v3/priorities/priority_collection_representer_spec.rb b/spec/lib/api/v3/priorities/priority_collection_representer_spec.rb
index 990a035f0d..71adbedb94 100644
--- a/spec/lib/api/v3/priorities/priority_collection_representer_spec.rb
+++ b/spec/lib/api/v3/priorities/priority_collection_representer_spec.rb
@@ -30,22 +30,11 @@ require 'spec_helper'
 
 describe ::API::V3::Priorities::PriorityCollectionRepresenter do
   let(:priorities)  { FactoryGirl.build_list(:priority, 3) }
-  let(:representer) { described_class.new(priorities) }
+  let(:representer) { described_class.new(priorities, 42, 'priorities') }
 
   context 'generation' do
-    subject(:generated) { representer.to_json }
+    subject(:collection) { representer.to_json }
 
-    it { should include_json('Priorities'.to_json).at_path('_type') }
-
-    it { should have_json_type(Object).at_path('_links') }
-    it 'should link to self' do
-      expect(subject).to have_json_path('_links/self/href')
-    end
-
-    describe 'priorities' do
-      it { should have_json_path('_embedded/priorities') }
-      it { should have_json_size(3).at_path('_embedded/priorities') }
-      it { should have_json_path('_embedded/priorities/2/name') }
-    end
+    it_behaves_like 'API V3 collection decorated', 42, 3, 'priorities', 'Priority'
   end
 end
diff --git a/spec/lib/api/v3/statuses/shared/status_collection_representer.rb b/spec/lib/api/v3/statuses/shared/status_collection_representer.rb
index 539987bd90..d4a8c84725 100644
--- a/spec/lib/api/v3/statuses/shared/status_collection_representer.rb
+++ b/spec/lib/api/v3/statuses/shared/status_collection_representer.rb
@@ -1,21 +1,4 @@
-RSpec.shared_examples 'status collection representer' do
+RSpec.shared_context 'status collection representer' do |self_link|
   let(:statuses)  { FactoryGirl.build_list(:status, 3) }
-  let(:representer) { described_class.new(statuses) }
-
-  context 'generation' do
-    subject(:generated) { representer.to_json }
-
-    it { should include_json('Statuses'.to_json).at_path('_type') }
-
-    it { should have_json_type(Object).at_path('_links') }
-    it 'should link to self' do
-      expect(subject).to have_json_path('_links/self/href')
-    end
-
-    describe 'statuses' do
-      it { should have_json_path('_embedded/statuses') }
-      it { should have_json_size(3).at_path('_embedded/statuses') }
-      it { should have_json_path('_embedded/statuses/2/name') }
-    end
-  end
+  let(:representer) { described_class.new(statuses, 42, self_link) }
 end
diff --git a/spec/lib/api/v3/statuses/status_collection_representer_spec.rb b/spec/lib/api/v3/statuses/status_collection_representer_spec.rb
index bbbbd959b2..7541c9ed3c 100644
--- a/spec/lib/api/v3/statuses/status_collection_representer_spec.rb
+++ b/spec/lib/api/v3/statuses/status_collection_representer_spec.rb
@@ -30,13 +30,11 @@ require 'spec_helper'
 require 'lib/api/v3/statuses/shared/status_collection_representer'
 
 describe ::API::V3::Statuses::StatusCollectionRepresenter do
-  include_examples 'status collection representer'
+  include_context 'status collection representer', 'statuses'
 
   context 'generation' do
-    subject(:generated) { representer.to_json }
+    subject(:collection) { representer.to_json }
 
-    it 'should have link to self' do
-      expect(parse_json(subject)['_links']['self']['href']).to match(%r{api/v3/statuses$})
-    end
+    it_behaves_like 'API V3 collection decorated', 42, 3, 'statuses', 'Status'
   end
 end
diff --git a/lib/api/v3/work_packages/statuses_api.rb b/spec/lib/api/v3/support/api_v3_collection.rb
similarity index 53%
rename from lib/api/v3/work_packages/statuses_api.rb
rename to spec/lib/api/v3/support/api_v3_collection.rb
index ed3a998f17..4e028358ab 100644
--- a/lib/api/v3/work_packages/statuses_api.rb
+++ b/spec/lib/api/v3/support/api_v3_collection.rb
@@ -1,4 +1,3 @@
-#-- encoding: UTF-8
 #-- copyright
 # OpenProject is a project management system.
 # Copyright (C) 2012-2014 the OpenProject Foundation (OPF)
@@ -27,39 +26,26 @@
 # See doc/COPYRIGHT.rdoc for more details.
 #++
 
-module API
-  module V3
-    module WorkPackages
-      class StatusesAPI < Grape::API
-        class AvailableStatusesFormatter
-          # this is an ugly hack to get the work package id for the path to self
-          def work_package_id(env)
-            env['rack.routing_args'][:id]
-          end
+require 'spec_helper'
 
-          def call(object, env)
-            if object.respond_to?(:to_json)
-              object.to_json(work_package_id: work_package_id(env))
-            else
-              MultiJson.dump(object)
-            end
-          end
-        end
+shared_examples_for 'API V3 collection decorated' do |total, count, self_link, type|
+  it { expect(collection).to be_json_eql('Collection'.to_json).at_path('_type') }
 
-        formatter 'hal+json', AvailableStatusesFormatter.new
+  describe 'elements' do
+    it { expect(collection).to be_json_eql(type.to_json).at_path('_embedded/elements/0/_type') }
+  end
 
-        get '/available_statuses' do
-          authorize({ controller: :work_packages, action: :update }, context: work_package.project)
+  describe 'quantities' do
+    it { expect(collection).to be_json_eql(total.to_json).at_path('total') }
 
-          work_package.type = work_package.project.types.find_by_name(params[:type]) if params[:type]
+    it { expect(collection).to be_json_eql(count.to_json).at_path('count') }
 
-          statuses = work_package.new_statuses_allowed_to(current_user)
+    it { expect(collection).to have_json_size(count).at_path('_embedded/elements') }
+  end
 
-          represented = ::API::V3::WorkPackages::AvailableStatusCollectionRepresenter.new(statuses)
+  describe '_links' do
+    let(:href) { "/api/v3/#{self_link}".to_json }
 
-          represented
-        end
-      end
-    end
+    it { expect(collection).to be_json_eql(href).at_path('_links/self/href') }
   end
 end
diff --git a/spec/lib/api/v3/work_packages/available_status_collection_representer_spec.rb b/spec/lib/api/v3/users/user_collection_representer_spec.rb
similarity index 58%
rename from spec/lib/api/v3/work_packages/available_status_collection_representer_spec.rb
rename to spec/lib/api/v3/users/user_collection_representer_spec.rb
index 272e1cd282..9905f8e5ce 100644
--- a/spec/lib/api/v3/work_packages/available_status_collection_representer_spec.rb
+++ b/spec/lib/api/v3/users/user_collection_representer_spec.rb
@@ -3,7 +3,7 @@
 # Copyright (C) 2012-2014 the OpenProject Foundation (OPF)
 #
 # This program is free software; you can redistribute it and/or
-# modify it under the terms of the GNU General Public License status 3.
+# modify it under the terms of the GNU General Public License version 3.
 #
 # OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
 # Copyright (C) 2006-2013 Jean-Philippe Lang
@@ -11,8 +11,8 @@
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
-# as published by the Free Software Foundation; either status 2
-# of the License, or (at your option) any later status.
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
 #
 # This program is distributed in the hope that it will be useful,
 # but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -27,20 +27,19 @@
 #++
 
 require 'spec_helper'
-require 'lib/api/v3/statuses/shared/status_collection_representer'
 
-describe ::API::V3::WorkPackages::AvailableStatusCollectionRepresenter do
-  include_examples 'status collection representer'
+describe ::API::V3::Users::UserCollectionRepresenter do
+  let(:users) {
+    FactoryGirl.build_list(:user,
+                           3,
+                           created_on: Time.now,
+                           updated_on: Time.now)
+  }
+  let(:representer) { described_class.new(users, 42, 'work_package/1/watchers') }
 
   context 'generation' do
-    subject(:generated) { representer.to_json(work_package_id: 1) }
+    subject(:collection) { representer.to_json }
 
-    it 'should have link to self' do
-      expect(parse_json(subject, '_links/self/href')).to end_with('api/v3/work_packages/1/available_statuses')
-    end
-
-    it 'should have link to work_package' do
-      expect(parse_json(subject, '_links/work_package/href')).to end_with('api/v3/work_packages/1')
-    end
+    it_behaves_like 'API V3 collection decorated', 42, 3, 'work_package/1/watchers', 'User'
   end
 end
diff --git a/spec/lib/api/v3/versions/version_collection_representer_spec.rb b/spec/lib/api/v3/versions/version_collection_representer_spec.rb
index e2488f4f8b..cf7220caf3 100644
--- a/spec/lib/api/v3/versions/version_collection_representer_spec.rb
+++ b/spec/lib/api/v3/versions/version_collection_representer_spec.rb
@@ -29,33 +29,13 @@
 require 'spec_helper'
 
 describe ::API::V3::Versions::VersionCollectionRepresenter do
-  let(:project)  { FactoryGirl.build(:project, id: 666) }
+  let(:self_link) { 'projects/1/versions' }
   let(:versions) { FactoryGirl.build_list(:version, 3) }
-  let(:representer) { described_class.new(versions, project: project) }
-
-  describe '#initialize' do
-    context 'with incorrect parameters' do
-      it 'should raise without a project' do
-        expect { described_class.new(versions) }.to raise_error(ArgumentError)
-      end
-    end
-  end
+  let(:representer) { described_class.new(versions, 42, self_link) }
 
   context 'generation' do
-    subject(:generated) { representer.to_json }
-
-    it { should include_json('Versions'.to_json).at_path('_type') }
-
-    it { should have_json_type(Object).at_path('_links') }
-    it 'should link to self' do
-      expect(generated).to have_json_path('_links/self/href')
-      expect(parse_json(generated, '_links/self/href')).to match %r{/api/v3/projects/666/versions$}
-    end
+    subject(:collection) { representer.to_json }
 
-    describe 'versions' do
-      it { should have_json_path('_embedded/versions') }
-      it { should have_json_size(3).at_path('_embedded/versions') }
-      it { should have_json_path('_embedded/versions/2/name') }
-    end
+    it_behaves_like 'API V3 collection decorated', 42, 3, 'projects/1/versions', 'Version'
   end
 end
diff --git a/spec/requests/api/v3/category_resource_spec.rb b/spec/requests/api/v3/category_resource_spec.rb
index d5a56d66b0..2d49b66c4e 100644
--- a/spec/requests/api/v3/category_resource_spec.rb
+++ b/spec/requests/api/v3/category_resource_spec.rb
@@ -55,14 +55,7 @@ describe 'API v3 Category resource' do
         get get_path
       end
 
-      it 'should respond with 200' do
-        expect(subject.status).to eq(200)
-      end
-
-      it 'should respond with categories' do
-        expect(subject.body).to include_json('Categories'.to_json).at_path('_type')
-        expect(subject.body).to have_json_size(3).at_path('_embedded/categories')
-      end
+      it_behaves_like 'API V3 collection response', 3, 3, 'Category'
     end
   end
 end
diff --git a/spec/requests/api/v3/priority_resource_spec.rb b/spec/requests/api/v3/priority_resource_spec.rb
index 41901a8b47..a3678c0a43 100644
--- a/spec/requests/api/v3/priority_resource_spec.rb
+++ b/spec/requests/api/v3/priority_resource_spec.rb
@@ -1,4 +1,3 @@
-#-- encoding: UTF-8
 #-- copyright
 # OpenProject is a project management system.
 # Copyright (C) 2012-2014 the OpenProject Foundation (OPF)
@@ -54,14 +53,7 @@ describe 'API v3 Priority resource' do
         get get_path
       end
 
-      it 'should respond with 200' do
-        expect(subject.status).to eq(200)
-      end
-
-      it 'should respond with priorities, scoped to project' do
-        expect(subject.body).to include_json('Priorities'.to_json).at_path('_type')
-        expect(subject.body).to have_json_size(2).at_path('_embedded/priorities')
-      end
+      it_behaves_like 'API V3 collection response', 2, 2, 'Priority'
     end
   end
 end
diff --git a/spec/requests/api/v3/status_resource_spec.rb b/spec/requests/api/v3/status_resource_spec.rb
index 52591f4ba3..ebcd731098 100644
--- a/spec/requests/api/v3/status_resource_spec.rb
+++ b/spec/requests/api/v3/status_resource_spec.rb
@@ -1,4 +1,3 @@
-#-- encoding: UTF-8
 #-- copyright
 # OpenProject is a project management system.
 # Copyright (C) 2012-2014 the OpenProject Foundation (OPF)
@@ -55,14 +54,7 @@ describe 'API v3 Status resource' do
           get get_path
         end
 
-        it 'should respond with 200' do
-          expect(subject.status).to eq(200)
-        end
-
-        it 'should respond with statuses, scoped to project' do
-          expect(subject.body).to include_json('Statuses'.to_json).at_path('_type')
-          expect(subject.body).to have_json_size(4).at_path('_embedded/statuses')
-        end
+        it_behaves_like 'API V3 collection response', 4, 4, 'Status'
       end
     end
   end
diff --git a/lib/api/v3/work_packages/available_status_collection_representer.rb b/spec/requests/api/v3/support/api_v3_collection_response.rb
similarity index 55%
rename from lib/api/v3/work_packages/available_status_collection_representer.rb
rename to spec/requests/api/v3/support/api_v3_collection_response.rb
index e0c838b4b5..492f06d6d6 100644
--- a/lib/api/v3/work_packages/available_status_collection_representer.rb
+++ b/spec/requests/api/v3/support/api_v3_collection_response.rb
@@ -1,10 +1,9 @@
-#-- encoding: UTF-8
 #-- copyright
 # OpenProject is a project management system.
 # Copyright (C) 2012-2014 the OpenProject Foundation (OPF)
 #
 # This program is free software; you can redistribute it and/or
-# modify it under the terms of the GNU General Public License status 3.
+# modify it under the terms of the GNU General Public License version 3.
 #
 # OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
 # Copyright (C) 2006-2013 Jean-Philippe Lang
@@ -12,8 +11,8 @@
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
-# as published by the Free Software Foundation; either status 2
-# of the License, or (at your option) any later status.
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
 #
 # This program is distributed in the hope that it will be useful,
 # but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -27,24 +26,24 @@
 # See doc/COPYRIGHT.rdoc for more details.
 #++
 
-module API
-  module V3
-    module WorkPackages
-      class AvailableStatusCollectionRepresenter < ::API::V3::Statuses::StatusCollectionRepresenter
-        link :self do |opts|
-          "#{work_package_url(opts[:work_package_id])}/available_statuses"
-        end
+require 'spec_helper'
 
-        link :work_package do |opts|
-          work_package_url(opts[:work_package_id])
-        end
+shared_examples_for 'API V3 collection response' do |total, count, type|
+  subject { response.body }
 
-        private
+  it { expect(response.status).to eql(200) }
 
-        def work_package_url(work_package_id)
-          "#{root_path}api/v3/work_packages/#{work_package_id}"
-        end
-      end
+  it { is_expected.to be_json_eql('Collection'.to_json).at_path('_type') }
+
+  it { is_expected.to be_json_eql(count.to_json).at_path('count') }
+
+  it { is_expected.to be_json_eql(total.to_json).at_path('total') }
+
+  it { is_expected.to have_json_size(count) .at_path('_embedded/elements') }
+
+  it 'has element of specified type if elements exist' do
+    if count > 0
+      is_expected.to be_json_eql(type.to_json).at_path('_embedded/elements/0/_type')
     end
   end
 end
diff --git a/spec/requests/api/v3/version_resource_spec.rb b/spec/requests/api/v3/version_resource_spec.rb
index 54ffa0f96c..c48a693294 100644
--- a/spec/requests/api/v3/version_resource_spec.rb
+++ b/spec/requests/api/v3/version_resource_spec.rb
@@ -1,3 +1,31 @@
+#-- copyright
+# OpenProject is a project management system.
+# Copyright (C) 2012-2014 the OpenProject Foundation (OPF)
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License version 3.
+#
+# OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
+# Copyright (C) 2006-2013 Jean-Philippe Lang
+# Copyright (C) 2010-2013 the ChiliProject Team
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+#
+# See doc/COPYRIGHT.rdoc for more details.
+#++
+
 require 'spec_helper'
 require 'rack/test'
 
@@ -27,14 +55,7 @@ describe 'API v3 Version resource' do
         get get_path
       end
 
-      it 'should respond with 200' do
-        expect(subject.status).to eq(200)
-      end
-
-      it 'should respond with versions, scoped to project' do
-        expect(subject.body).to include_json('Versions'.to_json).at_path('_type')
-        expect(subject.body).to have_json_size(4).at_path('_embedded/versions')
-      end
+      it_behaves_like 'API V3 collection response', 4, 4, 'Version'
     end
   end
 end
diff --git a/spec/requests/api/v3/work_packages/available_assignees_api_spec.rb b/spec/requests/api/v3/work_packages/available_assignees_api_spec.rb
index 9065166860..55bc3e8d26 100644
--- a/spec/requests/api/v3/work_packages/available_assignees_api_spec.rb
+++ b/spec/requests/api/v3/work_packages/available_assignees_api_spec.rb
@@ -48,16 +48,10 @@ describe API::V3::WorkPackages::WorkPackagesAPI, type: :request do
     describe 'response' do
       before { allow(User).to receive(:current).and_return(admin) }
 
-      shared_examples_for 'returns available assignees' do
+      shared_examples_for 'returns available assignees' do |total, count|
         include_context 'request available assignees'
 
-        subject { JSON.parse(response.body) }
-
-        it { expect(subject).to have_key('_embedded') }
-
-        it { expect(subject['_embedded']).to have_key('availableAssignees') }
-
-        it { expect(subject['_embedded']['availableAssignees'].count).to eq(available_assignee_count) }
+        it_behaves_like 'API V3 collection response', total, count, 'User'
       end
 
       describe 'users' do
@@ -72,9 +66,7 @@ describe API::V3::WorkPackages::WorkPackagesAPI, type: :request do
             allow(user).to receive(:updated_on).and_return(user.created_at)
           end
 
-          it_behaves_like 'returns available assignees' do
-            let(:available_assignee_count) { 1 }
-          end
+          it_behaves_like 'returns available assignees', 1, 1
         end
 
         context 'multiple users' do
@@ -88,9 +80,7 @@ describe API::V3::WorkPackages::WorkPackagesAPI, type: :request do
             allow(user2).to receive(:updated_on).and_return(user.created_at)
           end
 
-          it_behaves_like 'returns available assignees' do
-            let(:available_assignee_count) { 2 }
-          end
+          it_behaves_like 'returns available assignees', 2, 2
         end
       end
 
@@ -106,9 +96,7 @@ describe API::V3::WorkPackages::WorkPackagesAPI, type: :request do
             work_package.project.add_member! group, FactoryGirl.create(:role)
           end
 
-          it_behaves_like 'returns available assignees' do
-            let(:available_assignee_count) { 1 }
-          end
+          it_behaves_like 'returns available assignees', 1, 1
         end
 
         context 'without work_package_group_assignment' do
@@ -117,9 +105,7 @@ describe API::V3::WorkPackages::WorkPackagesAPI, type: :request do
             work_package.project.add_member! group, FactoryGirl.create(:role)
           end
 
-          it_behaves_like 'returns available assignees' do
-            let(:available_assignee_count) { 0 }
-          end
+          it_behaves_like 'returns available assignees', 0, 0
         end
       end
     end
diff --git a/spec/requests/api/v3/work_packages/available_responsibles_api_spec.rb b/spec/requests/api/v3/work_packages/available_responsibles_api_spec.rb
index c936d5f214..746ab27a40 100644
--- a/spec/requests/api/v3/work_packages/available_responsibles_api_spec.rb
+++ b/spec/requests/api/v3/work_packages/available_responsibles_api_spec.rb
@@ -1,3 +1,4 @@
+#-- copyright
 # OpenProject is a project management system.
 # Copyright (C) 2012-2014 the OpenProject Foundation (OPF)
 #
@@ -47,16 +48,10 @@ describe API::V3::WorkPackages::WorkPackagesAPI do
     describe 'response' do
       before { allow(User).to receive(:current).and_return(admin) }
 
-      shared_examples_for 'returns available responsibles' do
+      shared_examples_for 'returns available responsibles' do |total, count|
         include_context 'request available responsibles'
 
-        subject { JSON.parse(response.body) }
-
-        it { expect(subject).to have_key('_embedded') }
-
-        it { expect(subject['_embedded']).to have_key('availableResponsibles') }
-
-        it { expect(subject['_embedded']['availableResponsibles'].count).to eq(available_responsible_count) }
+        it_behaves_like 'API V3 collection response', total, count, 'User'
       end
 
       describe 'users' do
@@ -71,9 +66,7 @@ describe API::V3::WorkPackages::WorkPackagesAPI do
             allow(user).to receive(:updated_on).and_return(user.created_at)
           end
 
-          it_behaves_like 'returns available responsibles' do
-            let(:available_responsible_count) { 1 }
-          end
+          it_behaves_like 'returns available responsibles', 1, 1
         end
 
         context 'multiple users' do
@@ -87,9 +80,7 @@ describe API::V3::WorkPackages::WorkPackagesAPI do
             allow(user2).to receive(:updated_on).and_return(user.created_at)
           end
 
-          it_behaves_like 'returns available responsibles' do
-            let(:available_responsible_count) { 2 }
-          end
+          it_behaves_like 'returns available responsibles', 2, 2
         end
       end
 
@@ -105,9 +96,7 @@ describe API::V3::WorkPackages::WorkPackagesAPI do
             work_package.project.add_member! group, FactoryGirl.create(:role)
           end
 
-          it_behaves_like 'returns available responsibles' do
-            let(:available_responsible_count) { 0 }
-          end
+          it_behaves_like 'returns available responsibles', 0, 0
         end
       end
     end
diff --git a/spec/requests/api/v3/work_packages/available_statuses_endpoint_spec.rb b/spec/requests/api/v3/work_packages/available_statuses_endpoint_spec.rb
deleted file mode 100644
index 3f4272b98c..0000000000
--- a/spec/requests/api/v3/work_packages/available_statuses_endpoint_spec.rb
+++ /dev/null
@@ -1,98 +0,0 @@
-#-- encoding: UTF-8
-#-- copyright
-# OpenProject is a project management system.
-# Copyright (C) 2012-2014 the OpenProject Foundation (OPF)
-#
-# This program is free software; you can redistribute it and/or
-# modify it under the terms of the GNU General Public License version 3.
-#
-# OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
-# Copyright (C) 2006-2013 Jean-Philippe Lang
-# Copyright (C) 2010-2013 the ChiliProject Team
-#
-# This program is free software; you can redistribute it and/or
-# modify it under the terms of the GNU General Public License
-# as published by the Free Software Foundation; either version 2
-# of the License, or (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
-#
-# See doc/COPYRIGHT.rdoc for more details.
-#++
-
-require 'spec_helper'
-require 'rack/test'
-
-describe API::V3::WorkPackages::StatusesAPI do
-  include Rack::Test::Methods
-
-  def app
-    API::V3::Root
-  end
-
-  let(:authorized_user) do
-    FactoryGirl.create(:user, member_in_project: project,
-                              member_through_role: authorized_role)
-  end
-
-  let(:unauthorized_user) do
-    FactoryGirl.create(:user, member_in_project: project,
-                              member_through_role: unauthorized_role)
-  end
-  let(:authorized_role) { FactoryGirl.create(:role, permissions: [:edit_work_packages]) }
-  let(:unauthorized_role) { FactoryGirl.create(:role, permissions: []) }
-  let(:project) { FactoryGirl.create(:valid_project, is_public: false) }
-  let(:work_package) do
-    FactoryGirl.create(:work_package, project: project)
-  end
-  let(:status) do
-    FactoryGirl.create(:status)
-  end
-
-  describe '#get work_packages/:id/available_statuses' do
-    let(:get_path) { "/api/v3/work_packages/#{work_package.id}/available_statuses" }
-    subject(:response) { last_response }
-
-    context 'permitted user' do
-      let(:new_type) { project.types.first }
-      let(:new_status) { Status.where("id NOT IN (#{work_package.status.id})").first }
-      before do
-        allow(User).to receive(:current).and_return authorized_user
-
-        FactoryGirl.create(:workflow, old_status: work_package.status,
-                                      new_status: new_status,
-                                      role: authorized_role,
-                                      type_id: new_type.id)
-
-        get get_path, type: new_type.name
-      end
-
-      it 'should respond with 200' do
-        expect(subject.status).to eql(200)
-      end
-
-      it 'should return a json collection of all statuses' do
-        expect(parse_json(response.body, '_embedded/statuses/0/name')).to eql(new_status.name)
-      end
-    end
-
-    context 'unauthorized user' do
-      before do
-        allow(User).to receive(:current).and_return unauthorized_user
-
-        get get_path
-      end
-
-      it 'should respond with 403' do
-        expect(subject.status).to eql(403)
-      end
-    end
-  end
-end