diff --git a/app/controllers/concerns/setting_history_concern.rb b/app/controllers/concerns/setting_history_concern.rb
index deabda1..b043140 100644
--- a/app/controllers/concerns/setting_history_concern.rb
+++ b/app/controllers/concerns/setting_history_concern.rb
@@ -22,7 +22,7 @@ module SettingHistoryConcern
     else
       flash = { danger: @fluentd.agent.log_tail(1).first }
     end
-    after_dryrun_redirect(flash)
+    redirect_to :back, flash: flash
   end
 
 end
diff --git a/app/controllers/fluentd/settings/histories_controller.rb b/app/controllers/fluentd/settings/histories_controller.rb
index 5cac72a..c447308 100644
--- a/app/controllers/fluentd/settings/histories_controller.rb
+++ b/app/controllers/fluentd/settings/histories_controller.rb
@@ -13,8 +13,4 @@ class Fluentd::Settings::HistoriesController < ApplicationController
     #Do not use BackupFile.new(params[:id]) because params[:id] can be any path.
     @backup_file = Fluentd::SettingArchive::BackupFile.find_by_file_id(@fluentd.agent.config_backup_dir, params[:id])
   end
-
-  def after_dryrun_redirect(flash)
-    redirect_to daemon_setting_history_path(params[:id]), flash: flash
-  end
 end
diff --git a/app/controllers/fluentd/settings/running_backup_controller.rb b/app/controllers/fluentd/settings/running_backup_controller.rb
index 9a5c1a6..77f853a 100644
--- a/app/controllers/fluentd/settings/running_backup_controller.rb
+++ b/app/controllers/fluentd/settings/running_backup_controller.rb
@@ -6,8 +6,4 @@ class Fluentd::Settings::RunningBackupController < ApplicationController
   def find_backup_file
     @backup_file = Fluentd::SettingArchive::BackupFile.new(@fluentd.agent.running_config_backup_file)
   end
-
-  def after_dryrun_redirect(flash)
-    redirect_to daemon_setting_running_backup_path, flash: flash
-  end
 end