diff --git a/.rubocop.yml b/.rubocop.yml
index 3b8d266ea..54fa633a2 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -205,11 +205,6 @@ Lint/UnusedBlockArgument:
   StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#underscore-unused-vars'
   Enabled: false
 
-Lint/UnusedMethodArgument:
-  Description: 'Checks for unused method arguments.'
-  StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#underscore-unused-vars'
-  Enabled: false
-
 Style/SignalException:
   Description: 'Checks for proper usage of fail and raise.'
   StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#fail-method'
diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index 8e1692fe8..2f057ac77 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -363,7 +363,7 @@ class ApplicationController < ActionController::Base
     render json: generic_object.attributes_with_associations, status: :ok
   end
 
-  def model_index_render (object, params)
+  def model_index_render (object, _params)
     begin
       generic_objects = object.all
       model_index_render_result( generic_objects )
diff --git a/app/controllers/sessions/collection_network.rb b/app/controllers/sessions/collection_network.rb
index 4a6d8d579..d50c98fdc 100644
--- a/app/controllers/sessions/collection_network.rb
+++ b/app/controllers/sessions/collection_network.rb
@@ -1,7 +1,7 @@
 # Copyright (C) 2012-2014 Zammad Foundation, http://zammad-foundation.org/
 
 module ExtraCollection
-  def session( collections, assets, user )
+  def session( collections, assets, _user )
 
     collections[ Network.to_app_model ]                 = Network.all
     collections[ Network::Category.to_app_model ]       = Network::Category.all
diff --git a/app/models/channel/filter/database.rb b/app/models/channel/filter/database.rb
index 980cc1b6b..2945c8b3b 100644
--- a/app/models/channel/filter/database.rb
+++ b/app/models/channel/filter/database.rb
@@ -3,7 +3,7 @@
 # process all database filter
 module Channel::Filter::Database
 
-  def self.run( channel, mail )
+  def self.run( _channel, mail )
 
     # process postmaster filter
     filters = PostmasterFilter.where( active: true, channel: 'email' )
diff --git a/app/models/channel/sendmail.rb b/app/models/channel/sendmail.rb
index 21b81426a..e0ce4cc93 100644
--- a/app/models/channel/sendmail.rb
+++ b/app/models/channel/sendmail.rb
@@ -1,7 +1,7 @@
 # Copyright (C) 2012-2014 Zammad Foundation, http://zammad-foundation.org/
 
 class Channel::Sendmail
-  def send(attr, channel, notification = false)
+  def send(attr, _channel, notification = false)
 
     # return if we run import mode
     return if Setting.get('import_mode')
diff --git a/app/models/channel/twitter2.rb b/app/models/channel/twitter2.rb
index 82b800e81..ca4c62860 100644
--- a/app/models/channel/twitter2.rb
+++ b/app/models/channel/twitter2.rb
@@ -137,7 +137,7 @@ class Channel::TWITTER2
     [user, ticket, article]
   end
 
-  def fetch_user_create(tweet, sender)
+  def fetch_user_create(_tweet, sender)
     # create sender in db
     #    puts tweet.inspect
     #    user = User.where( :login => tweet.sender.screen_name ).first
@@ -180,7 +180,7 @@ class Channel::TWITTER2
     user
   end
 
-  def fetch_ticket_create(user, tweet, sender, channel, group)
+  def fetch_ticket_create(user, tweet, _sender, _channel, group)
 
     #Rails.logger.info '+++++++++++++++++++++++++++' + tweet.inspect
     # check if ticket exists
@@ -237,7 +237,7 @@ class Channel::TWITTER2
     ticket
   end
 
-  def fetch_article_create( user, ticket, tweet, sender )
+  def fetch_article_create( _user, ticket, tweet, sender )
 
     # find if record already exists
     article = Ticket::Article.where( message_id: tweet.id.to_s ).first
@@ -268,7 +268,7 @@ class Channel::TWITTER2
 
   end
 
-  def send(attr, notification = false)
+  def send(attr, _notification = false)
     #    Rails.logger.debug('tweeeeettttt!!!!!!')
     channel = Channel.where( area: 'Twitter::Inbound', active: true ).first
 
diff --git a/app/models/observer/ticket/notification.rb b/app/models/observer/ticket/notification.rb
index 62fd1343a..29092b912 100644
--- a/app/models/observer/ticket/notification.rb
+++ b/app/models/observer/ticket/notification.rb
@@ -158,7 +158,7 @@ class Observer::Ticket::Notification < ActiveRecord::Observer
     EventBuffer.add(e)
   end
 
-  def after_update(record)
+  def after_update(_record)
 
     # return if we run import mode
     return if Setting.get('import_mode')
diff --git a/app/models/observer/ticket/notification/background_job.rb b/app/models/observer/ticket/notification/background_job.rb
index 3c68b4947..77af28320 100644
--- a/app/models/observer/ticket/notification/background_job.rb
+++ b/app/models/observer/ticket/notification/background_job.rb
@@ -225,7 +225,7 @@ class Observer::Ticket::Notification::BackgroundJob
     changes
   end
 
-  def template_create(user, ticket, article, ticket_changes)
+  def template_create(user, ticket, article, _ticket_changes)
     article_content = ''
     if article
       article_content = '&lt;snip&gt;
@@ -348,7 +348,7 @@ Changes:<br>
     template
   end
 
-  def template_header(user)
+  def template_header(_user)
     '
 <style type="text/css">
   .header {
@@ -385,7 +385,7 @@ Changes:<br>
 '
   end
 
-  def template_footer(user, ticket, article)
+  def template_footer(_user, _ticket, _article)
     '
 <p>
   <a href="#{config.http_type}://#{config.fqdn}/#ticket/zoom/#{ticket.id}">i18n(View this directly here)</a>
diff --git a/app/models/package.rb b/app/models/package.rb
index 6db62f8d9..47f9dcb56 100644
--- a/app/models/package.rb
+++ b/app/models/package.rb
@@ -416,7 +416,7 @@ class Package < ApplicationModel
     true
   end
 
-  def self._delete_file(file, permission, data)
+  def self._delete_file(file, _permission, _data)
     location = @@root + '/' + file
 
     # install file
diff --git a/lib/auth/developer.rb b/lib/auth/developer.rb
index 27383b8b5..099fc824c 100644
--- a/lib/auth/developer.rb
+++ b/lib/auth/developer.rb
@@ -1,7 +1,7 @@
 # Copyright (C) 2012-2013 Zammad Foundation, http://zammad-foundation.org/
 
 module Auth::Developer
-  def self.check( username, password, config, user )
+  def self.check( _username, password, _config, user )
 
     # development systems
     if Setting.get('developer_mode') == true
diff --git a/lib/auth/internal.rb b/lib/auth/internal.rb
index 0c367442d..fc3e1f0a2 100644
--- a/lib/auth/internal.rb
+++ b/lib/auth/internal.rb
@@ -1,7 +1,7 @@
 # Copyright (C) 2012-2013 Zammad Foundation, http://zammad-foundation.org/
 
 module Auth::Internal
-  def self.check( username, password, config, user )
+  def self.check( _username, password, _config, user )
 
     # return if no user exists
     return nil if !user
diff --git a/lib/import/otrs2.rb b/lib/import/otrs2.rb
index 7301f0db2..9981d5920 100644
--- a/lib/import/otrs2.rb
+++ b/lib/import/otrs2.rb
@@ -480,7 +480,7 @@ module Import::OTRS2
 
   end
 
-  def self._ticket_result(result, locks, thread = '-')
+  def self._ticket_result(result, locks, _thread = '-')
 #    puts result.inspect
     map = {
       Ticket: {
@@ -968,7 +968,7 @@ module Import::OTRS2
     }
   end
 
-  def self.get_queue_ids(user, groups, roles, queues)
+  def self.get_queue_ids(user, _groups, _roles, queues)
     queue_ids = []
 
     # lookup by groups
@@ -991,7 +991,7 @@ module Import::OTRS2
     queue_ids
   end
 
-  def self.get_roles_ids(user, groups, roles, queues)
+  def self.get_roles_ids(user, groups, roles, _queues)
     roles    = ['Agent']
     role_ids = []
     user['GroupIDs'].each {|group_id, permissions|
diff --git a/lib/search_index_backend.rb b/lib/search_index_backend.rb
index a70600e8e..e2aba5d93 100644
--- a/lib/search_index_backend.rb
+++ b/lib/search_index_backend.rb
@@ -150,7 +150,7 @@ return search result
 
 =end
 
-  def self.search( query, limit = 10, index = nil, query_extention = {} )
+  def self.search( query, _limit = 10, index = nil, query_extention = {} )
     return [] if !query
 
     url = build_url()
diff --git a/lib/sso/env.rb b/lib/sso/env.rb
index e1b00d848..92cbc6c4d 100644
--- a/lib/sso/env.rb
+++ b/lib/sso/env.rb
@@ -1,7 +1,7 @@
 # Copyright (C) 2012-2013 Zammad Foundation, http://zammad-foundation.org/
 
 module Sso::Env
-  def self.check( params, config_item )
+  def self.check( _params, _config_item )
 
     # try to find user based on login
     if ENV['REMOTE_USER']
diff --git a/lib/sso/otrs.rb b/lib/sso/otrs.rb
index da1da28a9..be74e3b26 100644
--- a/lib/sso/otrs.rb
+++ b/lib/sso/otrs.rb
@@ -1,7 +1,7 @@
 # Copyright (C) 2012-2013 Zammad Foundation, http://zammad-foundation.org/
 
 module Sso::Otrs
-  def self.check( params, config_item )
+  def self.check( params, _config_item )
 
     endpoint = Setting.get('import_otrs_endpoint')
     return false if !endpoint
diff --git a/test/browser_test_helper.rb b/test/browser_test_helper.rb
index c66024eb8..e0f961f9a 100644
--- a/test/browser_test_helper.rb
+++ b/test/browser_test_helper.rb
@@ -696,7 +696,7 @@ class TestCase < Test::Unit::TestCase
 
 =end
 
-  def open_task(params = {}, fallback = false)
+  def open_task(params = {}, _fallback = false)
     log('open_task', params)
 
     instance = params[:browser] || @browser