diff --git a/test/test_helper.rb b/test/test_helper.rb
index 5ad6451..2572495 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -277,6 +277,10 @@ module Redmine
     end
   end
 
+  class HelperTest < ActionView::TestCase
+    
+  end
+
   class ControllerTest < ActionController::TestCase
     def process(method, path, parameters={}, session={}, flash={})
       if parameters.key?(:params) || parameters.key?(:session)
diff --git a/test/unit/helpers/activities_helper_test.rb b/test/unit/helpers/activities_helper_test.rb
index 57c93fa..2a31d14 100644
--- a/test/unit/helpers/activities_helper_test.rb
+++ b/test/unit/helpers/activities_helper_test.rb
@@ -17,7 +17,7 @@
 
 require File.expand_path('../../../test_helper', __FILE__)
 
-class ActivitiesHelperTest < ActionView::TestCase
+class ActivitiesHelperTest < Redmine::HelperTest
   include ActivitiesHelper
   include Redmine::I18n
 
diff --git a/test/unit/helpers/application_helper_test.rb b/test/unit/helpers/application_helper_test.rb
index 48260cc..7940ca1 100644
--- a/test/unit/helpers/application_helper_test.rb
+++ b/test/unit/helpers/application_helper_test.rb
@@ -19,7 +19,7 @@
 
 require File.expand_path('../../../test_helper', __FILE__)
 
-class ApplicationHelperTest < ActionView::TestCase
+class ApplicationHelperTest < Redmine::HelperTest
   include Redmine::I18n
   include ERB::Util
   include Rails.application.routes.url_helpers
diff --git a/test/unit/helpers/custom_fields_helper_test.rb b/test/unit/helpers/custom_fields_helper_test.rb
index 5ee500f..7e352a9 100644
--- a/test/unit/helpers/custom_fields_helper_test.rb
+++ b/test/unit/helpers/custom_fields_helper_test.rb
@@ -17,7 +17,7 @@
 
 require File.expand_path('../../../test_helper', __FILE__)
 
-class CustomFieldsHelperTest < ActionView::TestCase
+class CustomFieldsHelperTest < Redmine::HelperTest
   include ApplicationHelper
   include CustomFieldsHelper
   include Redmine::I18n
diff --git a/test/unit/helpers/groups_helper_test.rb b/test/unit/helpers/groups_helper_test.rb
index dc30470..b927a1d 100644
--- a/test/unit/helpers/groups_helper_test.rb
+++ b/test/unit/helpers/groups_helper_test.rb
@@ -17,7 +17,7 @@
 
 require File.expand_path('../../../test_helper', __FILE__)
 
-class GroupsHelperTest < ActionView::TestCase
+class GroupsHelperTest < Redmine::HelperTest
   include Redmine::I18n
   include ERB::Util
   include GroupsHelper
diff --git a/test/unit/helpers/issues_helper_test.rb b/test/unit/helpers/issues_helper_test.rb
index 63f8be0..0a31ddb 100644
--- a/test/unit/helpers/issues_helper_test.rb
+++ b/test/unit/helpers/issues_helper_test.rb
@@ -17,7 +17,7 @@
 
 require File.expand_path('../../../test_helper', __FILE__)
 
-class IssuesHelperTest < ActionView::TestCase
+class IssuesHelperTest < Redmine::HelperTest
   include Redmine::I18n
   include IssuesHelper
   include CustomFieldsHelper
diff --git a/test/unit/helpers/journals_helper_test.rb b/test/unit/helpers/journals_helper_test.rb
index c33a108..057dc7f 100644
--- a/test/unit/helpers/journals_helper_test.rb
+++ b/test/unit/helpers/journals_helper_test.rb
@@ -17,7 +17,7 @@
 
 require File.expand_path('../../../test_helper', __FILE__)
 
-class JournalsHelperTest < ActionView::TestCase
+class JournalsHelperTest < Redmine::HelperTest
   include JournalsHelper
 
   fixtures :projects, :trackers, :issue_statuses, :issues,
diff --git a/test/unit/helpers/members_helper_test.rb b/test/unit/helpers/members_helper_test.rb
index c9d7b09..0f2cf89 100644
--- a/test/unit/helpers/members_helper_test.rb
+++ b/test/unit/helpers/members_helper_test.rb
@@ -17,7 +17,7 @@
 
 require File.expand_path('../../../test_helper', __FILE__)
 
-class MembersHelperTest < ActionView::TestCase
+class MembersHelperTest < Redmine::HelperTest
   include Redmine::I18n
   include ERB::Util
   include MembersHelper
diff --git a/test/unit/helpers/my_helper_test.rb b/test/unit/helpers/my_helper_test.rb
index 2b7fa32..dc03c56 100644
--- a/test/unit/helpers/my_helper_test.rb
+++ b/test/unit/helpers/my_helper_test.rb
@@ -17,7 +17,7 @@
 
 require File.expand_path('../../../test_helper', __FILE__)
 
-class MyHelperTest < ActionView::TestCase
+class MyHelperTest < Redmine::HelperTest
   include Redmine::I18n
   include ERB::Util
   include MyHelper
diff --git a/test/unit/helpers/projects_helper_test.rb b/test/unit/helpers/projects_helper_test.rb
index 8a06a24..c72efff 100644
--- a/test/unit/helpers/projects_helper_test.rb
+++ b/test/unit/helpers/projects_helper_test.rb
@@ -17,7 +17,7 @@
 
 require File.expand_path('../../../test_helper', __FILE__)
 
-class ProjectsHelperTest < ActionView::TestCase
+class ProjectsHelperTest < Redmine::HelperTest
   include ApplicationHelper
   include ProjectsHelper
   include Redmine::I18n
diff --git a/test/unit/helpers/queries_helper_test.rb b/test/unit/helpers/queries_helper_test.rb
index 4855938..c573152 100644
--- a/test/unit/helpers/queries_helper_test.rb
+++ b/test/unit/helpers/queries_helper_test.rb
@@ -17,7 +17,7 @@
 
 require File.expand_path('../../../test_helper', __FILE__)
 
-class QueriesHelperTest < ActionView::TestCase
+class QueriesHelperTest < Redmine::HelperTest
   include QueriesHelper
   include Redmine::I18n
 
diff --git a/test/unit/helpers/routes_helper_test.rb b/test/unit/helpers/routes_helper_test.rb
index ec977c1..1e58d7f 100644
--- a/test/unit/helpers/routes_helper_test.rb
+++ b/test/unit/helpers/routes_helper_test.rb
@@ -19,7 +19,7 @@
 
 require File.expand_path('../../../test_helper', __FILE__)
 
-class RoutesHelperTest < ActionView::TestCase
+class RoutesHelperTest < Redmine::HelperTest
   fixtures :projects, :issues
 
   include Rails.application.routes.url_helpers
diff --git a/test/unit/helpers/search_helper_test.rb b/test/unit/helpers/search_helper_test.rb
index 07b58ac..6e1b1ac 100644
--- a/test/unit/helpers/search_helper_test.rb
+++ b/test/unit/helpers/search_helper_test.rb
@@ -19,7 +19,7 @@
 
 require File.expand_path('../../../test_helper', __FILE__)
 
-class SearchHelperTest < ActionView::TestCase
+class SearchHelperTest < Redmine::HelperTest
   include SearchHelper
   include Redmine::I18n
   include ERB::Util
diff --git a/test/unit/helpers/settings_helper_test.rb b/test/unit/helpers/settings_helper_test.rb
index be37fb7..42dc7a5 100644
--- a/test/unit/helpers/settings_helper_test.rb
+++ b/test/unit/helpers/settings_helper_test.rb
@@ -17,7 +17,7 @@
 
 require File.expand_path('../../../test_helper', __FILE__)
 
-class SettingsHelperTest < ActionView::TestCase
+class SettingsHelperTest < Redmine::HelperTest
   include SettingsHelper
   include Redmine::I18n
   include ERB::Util
diff --git a/test/unit/helpers/sort_helper_test.rb b/test/unit/helpers/sort_helper_test.rb
index c9e561d..605fd99 100644
--- a/test/unit/helpers/sort_helper_test.rb
+++ b/test/unit/helpers/sort_helper_test.rb
@@ -17,7 +17,7 @@
 
 require File.expand_path('../../../test_helper', __FILE__)
 
-class SortHelperTest < ActionView::TestCase
+class SortHelperTest < Redmine::HelperTest
   include SortHelper
   include Redmine::I18n
   include ERB::Util
diff --git a/test/unit/helpers/timelog_helper_test.rb b/test/unit/helpers/timelog_helper_test.rb
index 044981a..cec1e2c 100644
--- a/test/unit/helpers/timelog_helper_test.rb
+++ b/test/unit/helpers/timelog_helper_test.rb
@@ -17,7 +17,7 @@
 
 require File.expand_path('../../../test_helper', __FILE__)
 
-class TimelogHelperTest < ActionView::TestCase
+class TimelogHelperTest < Redmine::HelperTest
   include TimelogHelper
   include Redmine::I18n
   include ActionView::Helpers::TextHelper
diff --git a/test/unit/helpers/version_helper_test.rb b/test/unit/helpers/version_helper_test.rb
index 751a420..c6206b1 100644
--- a/test/unit/helpers/version_helper_test.rb
+++ b/test/unit/helpers/version_helper_test.rb
@@ -17,7 +17,7 @@
 
 require File.expand_path('../../../test_helper', __FILE__)
 
-class VersionsHelperTest < ActionView::TestCase
+class VersionsHelperTest < Redmine::HelperTest
   include Rails.application.routes.url_helpers
 
   fixtures :projects, :versions
diff --git a/test/unit/helpers/watchers_helper_test.rb b/test/unit/helpers/watchers_helper_test.rb
index 1e567ab..9e46f64 100644
--- a/test/unit/helpers/watchers_helper_test.rb
+++ b/test/unit/helpers/watchers_helper_test.rb
@@ -17,7 +17,7 @@
 
 require File.expand_path('../../../test_helper', __FILE__)
 
-class WatchersHelperTest < ActionView::TestCase
+class WatchersHelperTest < Redmine::HelperTest
   include WatchersHelper
   include Redmine::I18n
   include Rails.application.routes.url_helpers
diff --git a/test/unit/helpers/wiki_helper_test.rb b/test/unit/helpers/wiki_helper_test.rb
index 74dda89..8624848 100644
--- a/test/unit/helpers/wiki_helper_test.rb
+++ b/test/unit/helpers/wiki_helper_test.rb
@@ -17,7 +17,7 @@
 
 require File.expand_path('../../../test_helper', __FILE__)
 
-class WikiHelperTest < ActionView::TestCase
+class WikiHelperTest < Redmine::HelperTest
   include WikiHelper
   include Rails.application.routes.url_helpers