diff --git a/app/models/channel/email_parser.rb b/app/models/channel/email_parser.rb
index 939202ecb..e56b9c990 100644
--- a/app/models/channel/email_parser.rb
+++ b/app/models/channel/email_parser.rb
@@ -535,7 +535,7 @@ class Channel::EmailParser
       next if key == 'created_by_id'
 
       # check if id exists
-      key_short = key[ key.length - 3 , key.length ]
+      key_short = key[ key.length - 3, key.length ]
       if key_short == '_id'
         key_short = key[ 0, key.length - 3 ]
         header = "x-zammad-#{header_name}-#{key_short}"
diff --git a/lib/sessions.rb b/lib/sessions.rb
index cae7e09b2..3d52bf09e 100644
--- a/lib/sessions.rb
+++ b/lib/sessions.rb
@@ -395,7 +395,7 @@ returns
     path = @path + '/spool/'
     FileUtils.mkpath path
     file = Time.new.to_f.to_s + '-' + rand(99_999).to_s
-    File.open( path + '/' + file , 'wb' ) { |file|
+    File.open( path + '/' + file, 'wb' ) { |file|
       data = {
         msg: msg,
         timestamp: Time.now.to_i,
diff --git a/test/unit/session_basic_test.rb b/test/unit/session_basic_test.rb
index 552a4f723..7cc27ff6b 100644
--- a/test/unit/session_basic_test.rb
+++ b/test/unit/session_basic_test.rb
@@ -3,7 +3,7 @@ require 'test_helper'
 
 class SessionBasicTest < ActiveSupport::TestCase
   test 'a cache' do
-    Sessions::CacheIn.set( 'last_run_test' , true, { expires_in: 2.seconds } )
+    Sessions::CacheIn.set( 'last_run_test', true, { expires_in: 2.seconds } )
     result = Sessions::CacheIn.get( 'last_run_test' )
     assert_equal( true, result, 'check 1' )
 
@@ -37,7 +37,7 @@ class SessionBasicTest < ActiveSupport::TestCase
     assert_equal( nil, result, 'check 2' )
 
     # check delete cache
-    Sessions::CacheIn.set( 'last_run_delete' , true, { expires_in: 5.seconds } )
+    Sessions::CacheIn.set( 'last_run_delete', true, { expires_in: 5.seconds } )
     result = Sessions::CacheIn.get( 'last_run_delete' )
     assert_equal( true, result, 'check 1' )
     Sessions::CacheIn.delete( 'last_run_delete' )