diff --git a/test/test_helper.rb b/test/test_helper.rb
index 012d54e..edd6cc7 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -20,25 +20,6 @@ require File.expand_path(File.dirname(__FILE__) + '/../../../test/test_helper')
 module RedmineMessenger
   class TestCase
     include ActionDispatch::TestProcess
-    def self.plugin_fixtures(plugin, *fixture_names)
-      plugin_fixture_path = "#{Redmine::Plugin.find(plugin).directory}/test/fixtures"
-      if fixture_names.first == :all
-        fixture_names = Dir["#{plugin_fixture_path}/**/*.{yml}"]
-        fixture_names.map! { |f| f[(plugin_fixture_path.size + 1)..-5] }
-      else
-        fixture_names = fixture_names.flatten.map(&:to_s)
-      end
-
-      ActiveRecord::Fixtures.create_fixtures(plugin_fixture_path, fixture_names)
-    end
-
-    def uploaded_test_file(name, mime)
-      ActionController::TestUploadedFile.new(ActiveSupport::TestCase.fixture_path + "/files/#{name}", mime, true)
-    end
-
-    def self.create_fixtures(fixtures_directory, table_names, _class_names = {})
-      ActiveRecord::FixtureSet.create_fixtures(fixtures_directory, table_names, _class_names = {})
-    end
 
     def self.prepare
       Role.where(id: [1, 2]).each do |r|