diff --git a/app/controllers/import_otrs_controller.rb b/app/controllers/import_otrs_controller.rb
index a694c86c7..0e0d49091 100644
--- a/app/controllers/import_otrs_controller.rb
+++ b/app/controllers/import_otrs_controller.rb
@@ -64,7 +64,7 @@ class ImportOtrsController < ApplicationController
 
     # return result
     render json: {
-        result: 'invalid',
+      result: 'invalid',
         message_human: message_human,
     }
   end
diff --git a/app/models/package.rb b/app/models/package.rb
index 9c4b22dfd..f355adb63 100644
--- a/app/models/package.rb
+++ b/app/models/package.rb
@@ -207,11 +207,11 @@ class Package < ApplicationModel
       end
 
       # uninstall files of old package
-      self.uninstall({
+      self.uninstall(
         name: package_db.name,
         version: package_db.version,
         migration_not_down: true,
-      })
+      )
     end
 
     # store package
diff --git a/lib/sessions.rb b/lib/sessions.rb
index 3d52bf09e..5cdd478a0 100644
--- a/lib/sessions.rb
+++ b/lib/sessions.rb
@@ -42,10 +42,13 @@ returns
 
     # send update to browser
     if session && session['id']
-      self.send( client_id, {
-        event: 'ws:login',
-        data: { success: true },
-      })
+      self.send(
+        client_id,
+        {
+          event: 'ws:login',
+          data: { success: true },
+        }
+      )
     end
   end
 
diff --git a/lib/sessions/backend/activity_stream.rb b/lib/sessions/backend/activity_stream.rb
index 4e872d7d1..888d9d70e 100644
--- a/lib/sessions/backend/activity_stream.rb
+++ b/lib/sessions/backend/activity_stream.rb
@@ -54,11 +54,11 @@ class Sessions::Backend::ActivityStream
     end
 
     @client.log 'notify', "push activity_stream #{ data.first.class.to_s } for user #{ @user.id }"
-    @client.send({
+    @client.send(
       event: 'activity_stream_rebuild',
       collection: 'activity_stream',
       data: data,
-    })
+    )
   end
 
 end
diff --git a/lib/sessions/backend/collections/base.rb b/lib/sessions/backend/collections/base.rb
index 47217b0f3..4bdd65347 100644
--- a/lib/sessions/backend/collections/base.rb
+++ b/lib/sessions/backend/collections/base.rb
@@ -74,18 +74,18 @@ class Sessions::Backend::Collections::Base
       }
     end
     @client.log 'notify', "push assets for push_collection #{ items.first.class.to_s } for user #{ @user.id }"
-    @client.send({
+    @client.send(
       data: assets,
       event: [ 'loadAssets' ],
-    })
+    )
 
     @client.log 'notify', "push push_collection #{ items.first.class.to_s } for user #{ @user.id }"
-    @client.send({
+    @client.send(
       event: 'resetCollection',
       data: {
         items.first.class.to_app_model => all,
       },
-    })
+    )
   end
 
   def self.model_set(model)
diff --git a/lib/sessions/backend/rss.rb b/lib/sessions/backend/rss.rb
index 5cc0de2fa..95ceaa646 100644
--- a/lib/sessions/backend/rss.rb
+++ b/lib/sessions/backend/rss.rb
@@ -54,11 +54,11 @@ class Sessions::Backend::Rss
     end
 
     @client.log 'notify', "push rss for user #{@user.id}"
-    @client.send({
+    @client.send(
       event: 'rss_rebuild',
       collection: 'dashboard_rss',
       data: data,
-    })
+    )
   end
 
 end
diff --git a/lib/sessions/backend/ticket_create.rb b/lib/sessions/backend/ticket_create.rb
index 039059417..eb0e1c70c 100644
--- a/lib/sessions/backend/ticket_create.rb
+++ b/lib/sessions/backend/ticket_create.rb
@@ -59,10 +59,10 @@ class Sessions::Backend::TicketCreate
     end
 
     @client.log 'notify', "push ticket_create for user #{ @user.id }"
-    @client.send({
+    @client.send(
       collection: 'ticket_create_attributes',
       data: data,
-    })
+    )
   end
 
 end
diff --git a/lib/sessions/backend/ticket_overview_index.rb b/lib/sessions/backend/ticket_overview_index.rb
index e87e37f5a..aced54e92 100644
--- a/lib/sessions/backend/ticket_overview_index.rb
+++ b/lib/sessions/backend/ticket_overview_index.rb
@@ -57,10 +57,10 @@ class Sessions::Backend::TicketOverviewIndex
     end
 
     @client.log 'notify', "push overview_index for user #{ @user.id }"
-    @client.send({
+    @client.send(
       event: ['ticket_overview_index'],
       data: data,
-    })
+    )
   end
 
 end
diff --git a/lib/sessions/backend/ticket_overview_list.rb b/lib/sessions/backend/ticket_overview_list.rb
index 6a65a954d..57905e119 100644
--- a/lib/sessions/backend/ticket_overview_list.rb
+++ b/lib/sessions/backend/ticket_overview_list.rb
@@ -106,11 +106,11 @@ class Sessions::Backend::TicketOverviewList
         @client.log 'notify', "push overview_list for user #{ @user.id }"
 
         # send update to browser
-        @client.send({
+        @client.send(
           data: assets,
           event: [ 'loadAssets' ]
-        })
-        @client.send({
+        )
+        @client.send(
           data: {
             view: item[:index].link.to_s,
             overview: overview_data[:overview],
@@ -122,7 +122,7 @@ class Sessions::Backend::TicketOverviewList
             },
           },
           event: [ 'ticket_overview_rebuild' ],
-        })
+        )
       end
     }
     return results if !@client
diff --git a/test/unit/activity_stream_test.rb b/test/unit/activity_stream_test.rb
index 7a88664fb..0f2efd033 100644
--- a/test/unit/activity_stream_test.rb
+++ b/test/unit/activity_stream_test.rb
@@ -35,7 +35,7 @@ class ActivityStreamTest < ActiveSupport::TestCase
             created_by_id: current_user.id,
           },
           article: {
-              updated_by_id: current_user.id,
+            updated_by_id: current_user.id,
               created_by_id: current_user.id,
               type_id: Ticket::Article::Type.lookup( name: 'phone' ).id,
               sender_id: Ticket::Article::Sender.lookup( name: 'Customer' ).id,
@@ -59,10 +59,10 @@ class ActivityStreamTest < ActiveSupport::TestCase
         },
         check: [
           {
-             result: true,
+            result: true,
              object: 'Ticket',
              type: 'updated',
-           },
+          },
           {
             result: true,
             object: 'Ticket::Article',
diff --git a/test/unit/history_test.rb b/test/unit/history_test.rb
index 6426c2fc0..a00bbad78 100644
--- a/test/unit/history_test.rb
+++ b/test/unit/history_test.rb
@@ -21,7 +21,7 @@ class HistoryTest < ActiveSupport::TestCase
             created_by_id: current_user.id,
           },
           article: {
-              updated_by_id: current_user.id,
+            updated_by_id: current_user.id,
               created_by_id: current_user.id,
               type_id: Ticket::Article::Type.lookup( name: 'phone' ).id,
               sender_id: Ticket::Article::Sender.lookup( name: 'Customer' ).id,
@@ -88,7 +88,7 @@ class HistoryTest < ActiveSupport::TestCase
             created_by_id: current_user.id,
           },
           article: {
-              created_by_id: current_user.id,
+            created_by_id: current_user.id,
               updated_by_id: current_user.id,
               type_id: Ticket::Article::Type.lookup(name: 'phone' ).id,
               sender_id: Ticket::Article::Sender.lookup(name: 'Customer' ).id,
diff --git a/test/unit/online_notifiaction_test.rb b/test/unit/online_notifiaction_test.rb
index 7e71fd103..c07863b28 100644
--- a/test/unit/online_notifiaction_test.rb
+++ b/test/unit/online_notifiaction_test.rb
@@ -72,15 +72,15 @@ class OnlineNotificationTest < ActiveSupport::TestCase
         },
         check: [
           {
-             type: 'create',
+            type: 'create',
              object: 'Ticket',
              created_by_id: agent_user1.id,
-           },
+          },
          {
-            type: 'update',
+           type: 'update',
             object: 'Ticket',
             created_by_id: customer_user.id,
-          },
+         },
         ],
       },
 
@@ -123,15 +123,15 @@ class OnlineNotificationTest < ActiveSupport::TestCase
         },
         check: [
           {
-             type: 'create',
+            type: 'create',
              object: 'Ticket',
              created_by_id: agent_user1.id,
-           },
+          },
          {
-            type: 'update',
+           type: 'update',
             object: 'Ticket',
             created_by_id: customer_user.id,
-          },
+         },
         ],
       },
 
@@ -174,15 +174,15 @@ class OnlineNotificationTest < ActiveSupport::TestCase
         },
         check: [
           {
-             type: 'create',
+            type: 'create',
              object: 'Ticket',
              created_by_id: agent_user1.id,
-           },
+          },
          {
-            type: 'update',
+           type: 'update',
             object: 'Ticket',
             created_by_id: customer_user.id,
-          },
+         },
         ],
       },
 
@@ -225,15 +225,15 @@ class OnlineNotificationTest < ActiveSupport::TestCase
         },
         check: [
           {
-             type: 'create',
+            type: 'create',
              object: 'Ticket',
              created_by_id: agent_user1.id,
-           },
+          },
          {
-            type: 'update',
+           type: 'update',
             object: 'Ticket',
             created_by_id: customer_user.id,
-          },
+         },
         ],
       },
     ]