diff --git a/app/controllers/fluentd/settings_controller.rb b/app/controllers/fluentd/settings_controller.rb
index 641f810..520f494 100644
--- a/app/controllers/fluentd/settings_controller.rb
+++ b/app/controllers/fluentd/settings_controller.rb
@@ -1,3 +1,5 @@
+require "fluent/config/v1_parser"
+
 class Fluentd::SettingsController < ApplicationController
   before_action :login_required
   before_action :find_fluentd
diff --git a/spec/features/setting_spec.rb b/spec/features/setting_spec.rb
new file mode 100644
index 0000000..71c12b9
--- /dev/null
+++ b/spec/features/setting_spec.rb
@@ -0,0 +1,33 @@
+require 'spec_helper'
+
+describe 'setting', stub: :daemon do
+  let!(:exists_user) { build(:user) }
+
+  before do
+    login_with exists_user
+
+    daemon.agent.config_write 'GREAT CONFIG HERE'
+
+    visit '/daemon/setting'
+  end
+
+  it 'shows setting' do
+    page.should have_css('h1', text: I18n.t('fluentd.settings.show.page_title'))
+    page.should have_link(I18n.t('terms.edit'))
+    page.should have_css('pre', text: 'GREAT CONFIG HERE')
+  end
+
+  it 'edits setting' do
+    click_link I18n.t('terms.edit')
+
+    page.should have_css('h1', text: I18n.t('fluentd.settings.edit.page_title'))
+    page.should have_css('p.text-danger', text: I18n.t('terms.notice_restart_for_config_edit', brand: 'fluentd'))
+
+    fill_in 'config', with: 'SUPER GREAT CONFIG HERE'
+
+    click_button I18n.t('terms.update')
+
+    current_path.should == '/daemon/setting'
+    page.should have_css('pre', text: 'SUPER GREAT CONFIG HERE')
+  end
+end