diff --git a/app/models/user.rb b/app/models/user.rb
index 198287fcb..972e2bfea 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -194,6 +194,7 @@ returns
     # check failed logins
     max_login_failed = Setting.get('password_max_login_failed').to_i || 10
     if user && user.login_failed > max_login_failed
+      logger.info "Max login faild reached for user #{user.login}."
       return false
     end
 
diff --git a/lib/auth.rb b/lib/auth.rb
index f1a21ea2f..5f85ab982 100644
--- a/lib/auth.rb
+++ b/lib/auth.rb
@@ -48,6 +48,8 @@ returns
       # auth ok
       if user_auth
 
+        Rails.logger.info "Authentication against #{config_item[:adapter]} for user #{user.login} ok."
+
         # remember last login date
         user_auth.update_last_login
 
diff --git a/lib/auth/developer.rb b/lib/auth/developer.rb
index fc28219ee..27383b8b5 100644
--- a/lib/auth/developer.rb
+++ b/lib/auth/developer.rb
@@ -5,7 +5,10 @@ module Auth::Developer
 
     # development systems
     if Setting.get('developer_mode') == true
-      return user if password == 'test'
+      if password == 'test'
+        Rails.logger.info "System in developer mode, authentication for user #{user.login} ok."
+        return user
+      end
     end
 
     false
diff --git a/lib/auth/ldap.rb b/lib/auth/ldap.rb
index b9a13334e..c7b83c349 100644
--- a/lib/auth/ldap.rb
+++ b/lib/auth/ldap.rb
@@ -18,11 +18,11 @@ module Auth::Ldap
     # ldap bind
     begin
       if !ldap.bind
-        puts "NOTICE: Can't bind to '#{config[:host]}', #{ldap.get_operation_result.code}, #{ldap.get_operation_result.message}"
+        Rails.logger.info "Can't bind to '#{config[:host]}', #{ldap.get_operation_result.code}, #{ldap.get_operation_result.message}"
         return
       end
     rescue Exception => e
-      puts "NOTICE: Can't connect to '#{config[:host]}', #{e.to_s}"
+      Rails.logger.info "Can't connect to '#{config[:host]}', #{e.to_s}"
       return
     end
 
@@ -47,14 +47,14 @@ module Auth::Ldap
     end
 
     if user_dn == nil
-      puts "NOTICE: ldap entry found for user '#{username}' with filter #{filter} failed!"
+      Rails.logger.info "ldap entry found for user '#{username}' with filter #{filter} failed!"
       return nil
     end
 
     # try ldap bind with user credentals
     auth = ldap.authenticate user_dn, password
     if !ldap.bind( auth )
-      puts "NOTICE: ldap bind with '#{user_dn}' failed!"
+      Rails.logger.info "ldap bind with '#{user_dn}' failed!"
       return false
     end
 
@@ -72,10 +72,10 @@ module Auth::Ldap
       if !user
         user_attributes[:created_by_id] = 1
         user = User.create( user_attributes )
-        puts "NOTICE: user created '#{user.login}'"
+        Rails.logger.debug "user created '#{user.login}'"
       else
         user.update_attributes( user_attributes )
-        puts "NOTICE: user updated '#{user.login}'"
+        Rails.logger.debug "user updated '#{user.login}'"
       end
     end
 
diff --git a/lib/sso.rb b/lib/sso.rb
index 26c58725a..83cdb75c6 100644
--- a/lib/sso.rb
+++ b/lib/sso.rb
@@ -59,6 +59,8 @@ returns
       # auth ok
       if user_auth
 
+        Rails.logger.info "Authentication against #{config_item[:adapter]} for user #{user.login} ok."
+
         # remember last login date
         user_auth.update_last_login
 
diff --git a/test/test_helper.rb b/test/test_helper.rb
index 5bd0c6865..cdc1e9abc 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -42,7 +42,6 @@ class ActiveSupport::TestCase
 
   # cleanup jobs
   def teardown
-    puts 'teardown'
 
     # check if jobs are proccessed
     return if Delayed::Job.all.empty?
diff --git a/test/unit/ticket_notification_test.rb b/test/unit/ticket_notification_test.rb
index 29157e490..0579da7ca 100644
--- a/test/unit/ticket_notification_test.rb
+++ b/test/unit/ticket_notification_test.rb
@@ -509,7 +509,7 @@ class TicketNotificationTest < ActiveSupport::TestCase
       },
     )
 
-    puts "hc #{human_changes.inspect}"
+    #puts "hc #{human_changes.inspect}"
     # check changed attributes
     human_changes = bg.human_changes(agent1, ticket1)
     assert( human_changes['Title'], 'Check if attributes translated based on ObjectManager::Attribute' )
@@ -523,13 +523,13 @@ class TicketNotificationTest < ActiveSupport::TestCase
     assert_not( human_changes['pending_till'] )
 
     human_changes = bg.human_changes(agent2, ticket1)
-    puts "hc2 #{human_changes.inspect}"
+    #puts "hc2 #{human_changes.inspect}"
 
     template = bg.template_update(agent1, ticket1, article, human_changes)
-    puts "t1 #{template.inspect}"
+    #puts "t1 #{template.inspect}"
 
     template = bg.template_update(agent2, ticket1, article, human_changes)
-    puts "t2 #{template.inspect}"
+    #puts "t2 #{template.inspect}"
 
   end