diff --git a/attributes/default.rb b/attributes/default.rb
index 68071a2d..059a9323 100644
--- a/attributes/default.rb
+++ b/attributes/default.rb
@@ -1,11 +1,11 @@
 # frozen_string_literal: true
 
 #
-# Cookbook Name:: os-hardening
+# Cookbook:: os-hardening
 # Attributes:: default
 #
-# Copyright 2012, Dominik Richter
-# Copyright 2014, Deutsche Telekom AG
+# Copyright:: 2012, Dominik Richter
+# Copyright:: 2014, Deutsche Telekom AG
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -23,7 +23,7 @@
 
 default['os-hardening'].tap do |os_hardening|
   # components of this cookbook
-  %w[packages limits login_defs minimize_access pam profile securetty].each do |cp|
+  %w(packages limits login_defs minimize_access pam profile securetty).each do |cp|
     os_hardening['components'][cp] = true
   end
 
@@ -76,7 +76,7 @@
     auth['timeout'] = 60
     auth['allow_homeless'] = false
     auth['login_defs']['template_cookbook'] = 'os-hardening'
-    auth['root_ttys'] = %w[console tty1 tty2 tty3 tty4 tty5 tty6]
+    auth['root_ttys'] = %w(console tty1 tty2 tty3 tty4 tty5 tty6)
     auth['uid_min'] = 1000
     auth['uid_max'] = 60000
     auth['gid_min'] = 1000
@@ -86,8 +86,7 @@
 
     # PAM settings
     auth['pam'].tap do |pam|
-      case node['platform_family']
-      when 'rhel', 'fedora', 'amazon'
+      if platform_family?('rhel', 'fedora', 'amazon')
         if node['platform_version'].to_f < 7
           pam['passwdqc']['enable'] = true
           pam['pwquality']['enable'] = false
@@ -109,8 +108,7 @@
   end
 
   # RH has a bit different defaults on some places
-  case node['platform_family']
-  when 'rhel', 'amazon'
+  if platform_family?('rhel', 'amazon')
     os_hardening['env']['umask'] = '077'
     os_hardening['auth']['sys_uid_min'] = 201
     os_hardening['auth']['sys_gid_min'] = 201
@@ -124,7 +122,7 @@
     # may contain: change_user
     security['users']['allow'] = []
     security['kernel']['enable_module_loading'] = true
-    security['kernel']['disable_filesystems'] = %w[cramfs freevxfs jffs2 hfs hfsplus squashfs udf vfat]
+    security['kernel']['disable_filesystems'] = %w(cramfs freevxfs jffs2 hfs hfsplus squashfs udf vfat)
     security['kernel']['enable_sysrq'] = false
     security['kernel']['enable_core_dump'] = false
     security['suid_sgid']['enforce'] = true
@@ -145,13 +143,13 @@
     # remove packages with known issues
     security['packages']['clean'] = true
     # list of packages with known issues
-    security['packages']['list'] = [
-      'xinetd',
-      'inetd',
-      'ypserv',
-      'telnet-server',
-      'rsh-server'
-    ]
+    security['packages']['list'] = %w(
+      xinetd
+      inetd
+      ypserv
+      telnet-server
+      rsh-server
+    )
 
     # SELinux enforcing (enforcing, permissive, unmanaged)
     security['selinux_mode'] = 'unmanaged'
diff --git a/attributes/sysctl.rb b/attributes/sysctl.rb
index abc71aa6..1e1bf6d3 100644
--- a/attributes/sysctl.rb
+++ b/attributes/sysctl.rb
@@ -1,10 +1,10 @@
 # frozen_string_literal: true
 
 #
-# Cookbook Name:: os-hardening
+# Cookbook:: os-hardening
 # Attributes:: sysctl
 #
-# Copyright 2014, Deutsche Telekom AG
+# Copyright:: 2014, Deutsche Telekom AG
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -92,10 +92,9 @@
 default['sysctl']['params']['net']['ipv6']['conf']['default']['accept_ra'] = 0
 
 # ExecShield protection against buffer overflows
-case node['platform_family']
-when 'rhel', 'fedora'
+if platform_family?('rhel', 'fedora')
   # on Oracle Linux with UEK it is not available; this helps address UEK on Oracle Linux 6
-  is_oracle_uek = (node['platform'] == 'oracle' && node['kernel']['release'] =~ /^4\..*uek/)
+  is_oracle_uek = (platform?('oracle') && node['kernel']['release'] =~ /^4\..*uek/)
 
   # on RHEL 7 its enabled per default and can't be disabled
   if node['platform_version'].to_f < 7 && !is_oracle_uek
diff --git a/libraries/apt_package_extras.rb b/libraries/apt_package_extras.rb
index 5c208fd3..29e38edb 100644
--- a/libraries/apt_package_extras.rb
+++ b/libraries/apt_package_extras.rb
@@ -1,11 +1,11 @@
 # frozen_string_literal: true
 
 #
-# Cookbook Name:: os-hardening
+# Cookbook:: os-hardening
 # Library:: apt_package_extras
 #
-# Copyright 2008, Chef Software, Inc.
-# Copyright 2015, Hardening Framework Team
+# Copyright:: 2008, Chef Software, Inc.
+# Copyright:: 2015, Hardening Framework Team
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/libraries/cookbook_version.rb b/libraries/cookbook_version.rb
index 20faa6e6..a3d31b22 100644
--- a/libraries/cookbook_version.rb
+++ b/libraries/cookbook_version.rb
@@ -1,11 +1,11 @@
 # frozen_string_literal: true
 
 #
-# Cookbook Name:: os-hardening
+# Cookbook:: os-hardening
 # Library:: cookbook_version
 #
-# Copyright 2014, Dominik Richter
-# Copyright 2014, Deutsche Telekom AG
+# Copyright:: 2014, Dominik Richter
+# Copyright:: 2014, Deutsche Telekom AG
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/libraries/gpgcheck.rb b/libraries/gpgcheck.rb
index 633b64fa..b1b80810 100644
--- a/libraries/gpgcheck.rb
+++ b/libraries/gpgcheck.rb
@@ -1,11 +1,11 @@
 # frozen_string_literal: true
 
 #
-# Cookbook Name:: os-hardening
+# Cookbook:: os-hardening
 # Library:: gpgcheck
 #
-# Copyright 2012, Dominik Richter
-# Copyright 2014, Deutsche Telekom AG
+# Copyright:: 2012, Dominik Richter
+# Copyright:: 2014, Deutsche Telekom AG
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/libraries/helpers_param.rb b/libraries/helpers_param.rb
index b75bfd18..2a48af6c 100644
--- a/libraries/helpers_param.rb
+++ b/libraries/helpers_param.rb
@@ -1,11 +1,11 @@
 # frozen_string_literal: true
 
 #
-# Cookbook Name:: os-hardening
+# Cookbook:: os-hardening
 # Library:: gpgcheck
 #
-# Copyright 2012, Dominik Richter
-# Copyright 2014, Deutsche Telekom AG
+# Copyright:: 2012, Dominik Richter
+# Copyright:: 2014, Deutsche Telekom AG
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/libraries/suid_sgid.rb b/libraries/suid_sgid.rb
index 07ce36aa..f7fd119b 100644
--- a/libraries/suid_sgid.rb
+++ b/libraries/suid_sgid.rb
@@ -1,11 +1,11 @@
 # frozen_string_literal: true
 
 #
-# Cookbook Name:: os-hardening
+# Cookbook:: os-hardening
 # Library:: suid_sgid
 #
-# Copyright 2012, Dominik Richter
-# Copyright 2014, Deutsche Telekom AG
+# Copyright:: 2012, Dominik Richter
+# Copyright:: 2014, Deutsche Telekom AG
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -46,9 +46,9 @@ def self.find_all_suid_sgid_files(start_at = '/')
       end
 
       def self.remove_suid_sgid_from_blacklist(blacklist)
-        blacklist.
-          select { |file| File.exist?(file) }.
-          each do |file|
+        blacklist
+          .select { |file| File.exist?(file) }
+          .each do |file|
             Chef::Log.info "suid_sgid: Blacklist SUID/SGID for '#{file}', removing bit..."
             remove_suid_sgid_from(file)
           end
diff --git a/metadata.rb b/metadata.rb
index b8094cdf..e5971cac 100644
--- a/metadata.rb
+++ b/metadata.rb
@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 #
-# Copyright 2014, Deutsche Telekom AG
+# Copyright:: 2014, Deutsche Telekom AG
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -21,7 +21,6 @@
 maintainer_email 'artem@posteo.de'
 license 'Apache-2.0'
 description 'Installs and configures operating system hardening'
-long_description IO.read(File.join(File.dirname(__FILE__), 'README.md'))
 version '4.0.0'
 source_url 'https://github.com/dev-sec/chef-os-hardening'
 issues_url 'https://github.com/dev-sec/chef-os-hardening/issues'
@@ -37,13 +36,3 @@
 supports 'fedora', '>= 28.0'
 supports 'suse'
 supports 'opensuseleap', '>= 42.1'
-
-recipe 'os-hardening::default', 'harden the operating system (all recipes)'
-recipe 'os-hardening::limits', 'prevent core dumps'
-recipe 'os-hardening::login_defs', 'harden /etc/login.defs'
-recipe 'os-hardening::minimize_access', 'enforce minimal file permissions'
-recipe 'os-hardening::pam', 'configure sane values for PAM'
-recipe 'os-hardening::profile', 'harden settings in /etc/profile.d'
-recipe 'os-hardening::securetty', 'limit the allowed TTYs for root login'
-recipe 'os-hardening::suid_sgid', 'reduce SUID and SGID bits in the filesystem'
-recipe 'os-hardening::sysctl', 'set sane sysctl values'
diff --git a/recipes/apt.rb b/recipes/apt.rb
index 4b208c2d..e1c66b66 100644
--- a/recipes/apt.rb
+++ b/recipes/apt.rb
@@ -1,10 +1,10 @@
 # frozen_string_literal: true
 
 #
-# Cookbook Name: os-hardening
+# Cookbook:: Name: os-hardening
 # Recipe: apt.rb
 #
-# Copyright 2015, Hardening Framework Team
+# Copyright:: 2015, Hardening Framework Team
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/recipes/auditd.rb b/recipes/auditd.rb
index 4dc332e0..6013f478 100644
--- a/recipes/auditd.rb
+++ b/recipes/auditd.rb
@@ -1,10 +1,10 @@
 # frozen_string_literal: true
 
 #
-# Cookbook Name: os-hardening
+# Cookbook:: Name: os-hardening
 # Recipe: auditd.rb
 #
-# Copyright 2017, Artem Sidorenko
+# Copyright:: 2017, Artem Sidorenko
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -22,10 +22,10 @@
 package node['os-hardening']['packages']['auditd']
 
 service 'auditd' do
-  supports %i[start stop restart reload status]
-  if (node['platform_family'] == 'rhel' && node['platform_version'].to_f >= 7) ||
-     (node['platform_family'] == 'fedora' && node['platform_version'].to_f >= 27) ||
-     (node['platform_family'] == 'amazon' && node['platform_version'].to_f >= 2)
+  supports %i(start stop restart reload status)
+  if (platform_family?('rhel') && node['platform_version'].to_f >= 7) ||
+     (platform_family?('fedora') && node['platform_version'].to_f >= 27) ||
+     (platform_family?('amazon') && node['platform_version'].to_f >= 2)
     restart_command 'service auditd restart'
   end
   action [:enable]
diff --git a/recipes/default.rb b/recipes/default.rb
index ee1a8601..6584d974 100644
--- a/recipes/default.rb
+++ b/recipes/default.rb
@@ -1,11 +1,11 @@
 # frozen_string_literal: true
 
 #
-# Cookbook Name: os-hardening
+# Cookbook:: Name: os-hardening
 # Recipe: default
 #
-# Copyright 2012, Dominik Richter
-# Copyright 2014, Deutsche Telekom AG
+# Copyright:: 2012, Dominik Richter
+# Copyright:: 2014, Deutsche Telekom AG
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -36,7 +36,7 @@
 
   # selinux should be included only on RH based systems
   node.default['os-hardening']['components']['selinux'] =
-    node['platform_family'] == 'rhel' || node['platform_family'] == 'fedora'
+    platform_family?('rhel', 'fedora')
 end
 
 # include all required components
diff --git a/recipes/limits.rb b/recipes/limits.rb
index 1962f6d4..cd5eadf5 100644
--- a/recipes/limits.rb
+++ b/recipes/limits.rb
@@ -1,10 +1,10 @@
 # frozen_string_literal: true
 
 #
-# Cookbook Name: os-hardening
+# Cookbook:: Name: os-hardening
 # Recipe: limits.rb
 #
-# Copyright 2014, Deutsche Telekom AG
+# Copyright:: 2014, Deutsche Telekom AG
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/recipes/login_defs.rb b/recipes/login_defs.rb
index 471368b9..0437f87e 100644
--- a/recipes/login_defs.rb
+++ b/recipes/login_defs.rb
@@ -1,10 +1,10 @@
 # frozen_string_literal: true
 
 #
-# Cookbook Name: os-hardening
+# Cookbook:: Name: os-hardening
 # Recipe: login_defs.rb
 #
-# Copyright 2014, Deutsche Telekom AG
+# Copyright:: 2014, Deutsche Telekom AG
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/recipes/minimize_access.rb b/recipes/minimize_access.rb
index 428196e3..57c02c88 100644
--- a/recipes/minimize_access.rb
+++ b/recipes/minimize_access.rb
@@ -1,10 +1,10 @@
 # frozen_string_literal: true
 
 #
-# Cookbook Name: os-hardening
+# Cookbook:: Name: os-hardening
 # Recipe: minimize_access
 #
-# Copyright 2014, Deutsche Telekom AG
+# Copyright:: 2014, Deutsche Telekom AG
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -21,7 +21,7 @@
 
 # remove write permissions from path folders ($PATH) for all regular users
 # this prevents changing any system-wide command from normal users
-paths = %w[/usr/local/sbin /usr/local/bin /usr/sbin /usr/bin /sbin /bin] + node['os-hardening']['env']['extra_user_paths']
+paths = %w(/usr/local/sbin /usr/local/bin /usr/sbin /usr/bin /sbin /bin) + node['os-hardening']['env']['extra_user_paths']
 paths.each do |folder|
   execute "remove write permission from #{folder}" do
     command "chmod go-w -R #{folder}"
@@ -59,7 +59,7 @@
 directory '/var/log' do
   owner 'root'
   # ubuntu with containers does not have rsyslog installed and syslog group does not exist
-  if node['platform'] == 'ubuntu' && node['packages']['rsyslog']
+  if platform?('ubuntu') && node['packages']['rsyslog']
     group 'syslog'
   else
     group 'root'
@@ -72,7 +72,7 @@
   only_if { ::File.exist?('/etc/crontab') }
 end
 
-cron_directories = %w[/etc/cron.hourly /etc/cron.daily /etc/cron.weekly /etc/cron.monthly /etc/cron.d]
+cron_directories = %w(/etc/cron.hourly /etc/cron.daily /etc/cron.weekly /etc/cron.monthly /etc/cron.d)
 cron_directories.each do |cron_path|
   next unless ::Dir.exist?(cron_path)
 
diff --git a/recipes/packages.rb b/recipes/packages.rb
index 8393f583..16a809dd 100644
--- a/recipes/packages.rb
+++ b/recipes/packages.rb
@@ -1,10 +1,10 @@
 # frozen_string_literal: true
 
 #
-# Cookbook Name: os-hardening
+# Cookbook:: Name: os-hardening
 # Recipe: packages.rb
 #
-# Copyright 2014, Deutsche Telekom AG
+# Copyright:: 2014, Deutsche Telekom AG
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -20,13 +20,7 @@
 #
 
 # do package config for ubuntu
-case node['platform_family']
-when 'debian'
-  include_recipe('os-hardening::apt')
-end
+include_recipe 'os-hardening::apt' if platform_family?('debian')
 
 # do package config for rhel-family
-case node['platform_family']
-when 'rhel', 'fedora', 'amazon'
-  include_recipe('os-hardening::yum')
-end
+include_recipe 'os-hardening::yum' if platform_family?('rhel', 'fedora', 'amazon')
diff --git a/recipes/pam.rb b/recipes/pam.rb
index a0e8696d..a9593d79 100644
--- a/recipes/pam.rb
+++ b/recipes/pam.rb
@@ -1,11 +1,11 @@
 # frozen_string_literal: true
 
 #
-# Cookbook Name: os-hardening
+# Cookbook:: Name: os-hardening
 # Recipe: pam.rb
 #
-# Copyright 2012, Dominik Richter
-# Copyright 2014, Deutsche Telekom AG
+# Copyright:: 2012, Dominik Richter
+# Copyright:: 2014, Deutsche Telekom AG
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/recipes/profile.rb b/recipes/profile.rb
index 35ad041b..a22c3f92 100644
--- a/recipes/profile.rb
+++ b/recipes/profile.rb
@@ -1,10 +1,10 @@
 # frozen_string_literal: true
 
 #
-# Cookbook Name: os-hardening
+# Cookbook:: Name: os-hardening
 # Recipe: profile.rb
 #
-# Copyright 2013, Deutsche Telekom AG
+# Copyright:: 2013, Deutsche Telekom AG
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/recipes/securetty.rb b/recipes/securetty.rb
index 47ccd2a6..df0b60df 100644
--- a/recipes/securetty.rb
+++ b/recipes/securetty.rb
@@ -1,11 +1,11 @@
 # frozen_string_literal: true
 
 #
-# Cookbook Name: os-hardening
+# Cookbook:: Name: os-hardening
 # Recipe: securetty
 #
-# Copyright 2012, Dominik Richter
-# Copyright 2014, Deutsche Telekom AG
+# Copyright:: 2012, Dominik Richter
+# Copyright:: 2014, Deutsche Telekom AG
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/recipes/selinux.rb b/recipes/selinux.rb
index 5d31d040..670942b7 100644
--- a/recipes/selinux.rb
+++ b/recipes/selinux.rb
@@ -1,10 +1,10 @@
 # frozen_string_literal: true
 
 #
-# Cookbook Name: os-hardening
+# Cookbook:: Name: os-hardening
 # Recipe: selinux.rv
 #
-# Copyright 2017, Deutsche Telekom AG
+# Copyright:: 2017, Deutsche Telekom AG
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -21,8 +21,7 @@
 
 # SELinux enforcing support
 
-case node['platform_family']
-when 'rhel', 'fedora', 'amazon'
+if platform_family?('rhel', 'fedora', 'amazon')
   unless node['os-hardening']['security']['selinux_mode'] == 'unmanaged'
     semode = case node['os-hardening']['security']['selinux_mode']
              when 'enforcing'
diff --git a/recipes/suid_sgid.rb b/recipes/suid_sgid.rb
index bf933cbf..29aa0941 100644
--- a/recipes/suid_sgid.rb
+++ b/recipes/suid_sgid.rb
@@ -1,11 +1,11 @@
 # frozen_string_literal: true
 
 #
-# Cookbook Name: os-hardening
+# Cookbook:: Name: os-hardening
 # Recipe: suid_sgid
 #
-# Copyright 2012, Dominik Richter
-# Copyright 2014, Deutsche Telekom AG
+# Copyright:: 2012, Dominik Richter
+# Copyright:: 2014, Deutsche Telekom AG
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/recipes/sysctl.rb b/recipes/sysctl.rb
index c4974a13..d4b7fd7e 100644
--- a/recipes/sysctl.rb
+++ b/recipes/sysctl.rb
@@ -1,11 +1,11 @@
 # frozen_string_literal: true
 
 #
-# Cookbook Name: os-hardening
+# Cookbook:: Name: os-hardening
 # Recipe: sysctl
 #
-# Copyright 2012, Dominik Richter
-# Copyright 2014, Deutsche Telekom AG
+# Copyright:: 2012, Dominik Richter
+# Copyright:: 2014, Deutsche Telekom AG
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -20,7 +20,7 @@
 # limitations under the License.
 #
 
-::Chef::Recipe.send(:include, SysctlCookbook::SysctlHelpers::Param)
+::Chef::DSL::Recipe.send(:include, SysctlCookbook::SysctlHelpers::Param)
 
 # cleanup of old sysctl related configurations. This can be removed at some point in the future
 # https://github.com/dev-sec/chef-os-hardening/issues/166#issuecomment-322433264
@@ -138,9 +138,9 @@
 
 # try to determine the real cpu vendor
 begin
-  cpu_vendor = node['cpu']['0']['vendor_id'].
-               sub(/^.*GenuineIntel.*$/, 'intel').
-               sub(/^.*AuthenticAMD.*$/, 'amd')
+  cpu_vendor = node['cpu']['0']['vendor_id']
+               .sub(/^.*GenuineIntel.*$/, 'intel')
+               .sub(/^.*AuthenticAMD.*$/, 'amd')
   node.default['os-hardening']['security']['cpu_vendor'] = cpu_vendor
 rescue # rubocop:disable Style/RescueStandardError
   log 'WARNING: Could not properly determine the cpu vendor. Fallback to intel cpu.' do
@@ -157,8 +157,7 @@
 
 # NSA 2.2.4.1 Set Daemon umask
 # do config for rhel-family
-case node['platform_family']
-when 'rhel', 'fedora', 'amazon'
+if platform_family?('rhel', 'fedora', 'amazon')
   template '/etc/sysconfig/init' do
     source 'rhel_sysconfig_init.erb'
     mode '0544'
@@ -173,8 +172,7 @@
 end
 
 # do initramfs config for ubuntu and debian
-case node['platform_family']
-when 'debian'
+if platform_family?('debian')
 
   # rebuild initramfs with starting pack of modules,
   # if module loading at runtime is disabled
diff --git a/recipes/yum.rb b/recipes/yum.rb
index 4677833a..0cba02f1 100644
--- a/recipes/yum.rb
+++ b/recipes/yum.rb
@@ -1,10 +1,10 @@
 # frozen_string_literal: true
 
 #
-# Cookbook Name: os-hardening
+# Cookbook:: Name: os-hardening
 # Recipe: pack_yum.rb
 #
-# Copyright 2014, Deutsche Telekom AG
+# Copyright:: 2014, Deutsche Telekom AG
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -43,7 +43,7 @@
 if node['os-hardening']['security']['packages']['clean']
 
   # remove unused repos
-  %w[CentOS-Debuginfo CentOS-Media CentOS-Vault].each do |repo|
+  %w(CentOS-Debuginfo CentOS-Media CentOS-Vault).each do |repo|
     yum_repository repo do
       action :remove
     end
diff --git a/spec/recipes/auditd_spec.rb b/spec/recipes/auditd_spec.rb
index f9d24c26..502354c6 100644
--- a/spec/recipes/auditd_spec.rb
+++ b/spec/recipes/auditd_spec.rb
@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 #
-# Copyright 2017, Artem Sidorenko
+# Copyright:: 2017, Artem Sidorenko
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/spec/recipes/default_spec.rb b/spec/recipes/default_spec.rb
index c4586cd3..047e63b6 100644
--- a/spec/recipes/default_spec.rb
+++ b/spec/recipes/default_spec.rb
@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 #
-# Copyright 2014, Deutsche Telekom AG
+# Copyright:: 2014, Deutsche Telekom AG
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -27,9 +27,9 @@
       node.normal['cpu']['0']['vendor_id'] = 'GenuineIntel'
       node.normal['env']['extra_user_paths'] = []
 
-      paths = %w[
+      paths = %w(
         /usr/local/sbin /usr/local/bin /usr/sbin /usr/bin /sbin /bin
-      ] + node['env']['extra_user_paths']
+      ) + node['env']['extra_user_paths']
       paths.each do |folder|
         stub_command(
           "find #{folder}  -perm -go+w -type f | wc -l | egrep '^0$'"
diff --git a/spec/recipes/limits_spec.rb b/spec/recipes/limits_spec.rb
index 44b892e1..3d42f270 100644
--- a/spec/recipes/limits_spec.rb
+++ b/spec/recipes/limits_spec.rb
@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 #
-# Copyright 2014, Deutsche Telekom AG
+# Copyright:: 2014, Deutsche Telekom AG
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/spec/recipes/login_defs_spec.rb b/spec/recipes/login_defs_spec.rb
index 0bd48f32..7b5801a4 100644
--- a/spec/recipes/login_defs_spec.rb
+++ b/spec/recipes/login_defs_spec.rb
@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 #
-# Copyright 2014, Deutsche Telekom AG
+# Copyright:: 2014, Deutsche Telekom AG
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -52,17 +52,17 @@
         sys_uid_max:              999,
         sys_gid_min:              100,
         sys_gid_max:              999,
-        mail_dir:                 '/var/mail'
+        mail_dir:                 '/var/mail',
       }
     )
   end
 
   it 'uses uid_min and gid_min in /etc/login.defs' do
-    is_expected.to render_file('/etc/login.defs').
-      with_content(/^PASS_WARN_AGE\s+7$/).
-      with_content(/^UID_MIN\s+5000$/).
-      with_content(/^UID_MAX\s+6000$/).
-      with_content(/^GID_MIN\s+5000$/).
-      with_content(/^GID_MAX\s+6000$/)
+    is_expected.to render_file('/etc/login.defs')
+      .with_content(/^PASS_WARN_AGE\s+7$/)
+      .with_content(/^UID_MIN\s+5000$/)
+      .with_content(/^UID_MAX\s+6000$/)
+      .with_content(/^GID_MIN\s+5000$/)
+      .with_content(/^GID_MAX\s+6000$/)
   end
 end
diff --git a/spec/recipes/minimize_access_spec.rb b/spec/recipes/minimize_access_spec.rb
index 43d97236..f6882614 100644
--- a/spec/recipes/minimize_access_spec.rb
+++ b/spec/recipes/minimize_access_spec.rb
@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 #
-# Copyright 2014, Deutsche Telekom AG
+# Copyright:: 2014, Deutsche Telekom AG
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/spec/recipes/pam_spec.rb b/spec/recipes/pam_spec.rb
index 28ff39ab..fe5402c5 100644
--- a/spec/recipes/pam_spec.rb
+++ b/spec/recipes/pam_spec.rb
@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 #
-# Copyright 2014, Deutsche Telekom AG
+# Copyright:: 2014, Deutsche Telekom AG
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/spec/recipes/profile_spec.rb b/spec/recipes/profile_spec.rb
index ea57bd24..cf989e2f 100644
--- a/spec/recipes/profile_spec.rb
+++ b/spec/recipes/profile_spec.rb
@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 #
-# Copyright 2014, Deutsche Telekom AG
+# Copyright:: 2014, Deutsche Telekom AG
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/spec/recipes/securetty_spec.rb b/spec/recipes/securetty_spec.rb
index bd94163b..c89cb5a6 100644
--- a/spec/recipes/securetty_spec.rb
+++ b/spec/recipes/securetty_spec.rb
@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 #
-# Copyright 2014, Deutsche Telekom AG
+# Copyright:: 2014, Deutsche Telekom AG
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -30,7 +30,7 @@
       group:     'root',
       mode:      '0400',
       variables: {
-        ttys: "console\ntty1\ntty2\ntty3\ntty4\ntty5\ntty6"
+        ttys: "console\ntty1\ntty2\ntty3\ntty4\ntty5\ntty6",
       }
     )
   end
diff --git a/spec/recipes/suid_sgid_spec.rb b/spec/recipes/suid_sgid_spec.rb
index 914926fb..ffc3244e 100644
--- a/spec/recipes/suid_sgid_spec.rb
+++ b/spec/recipes/suid_sgid_spec.rb
@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 #
-# Copyright 2014, Deutsche Telekom AG
+# Copyright:: 2014, Deutsche Telekom AG
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/spec/recipes/sysctl_spec.rb b/spec/recipes/sysctl_spec.rb
index 5f918442..e54eec0e 100644
--- a/spec/recipes/sysctl_spec.rb
+++ b/spec/recipes/sysctl_spec.rb
@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 #
-# Copyright 2014, Deutsche Telekom AG
+# Copyright:: 2014, Deutsche Telekom AG
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -372,29 +372,29 @@
 
     describe 'when unused filesystems are disabled with default values' do
       it 'should render the proper modprobe file' do
-        %w[cramfs freevxfs jffs2 hfs hfsplus squashfs udf vfat].each do |fs|
-          expect(chef_run).to render_file('/etc/modprobe.d/dev-sec.conf').
-            with_content("install #{fs} /bin/true")
+        %w(cramfs freevxfs jffs2 hfs hfsplus squashfs udf vfat).each do |fs|
+          expect(chef_run).to render_file('/etc/modprobe.d/dev-sec.conf')
+            .with_content("install #{fs} /bin/true")
         end
       end
     end
 
     describe 'when only some filesystems are disabled' do
-      let(:disable_filesystems) { %w[vfat udf] }
+      let(:disable_filesystems) { %w(vfat udf) }
 
       it 'should render the proper modprobe file' do
-        %w[udf vfat].each do |fs|
-          expect(chef_run).to render_file('/etc/modprobe.d/dev-sec.conf').
-            with_content("install #{fs} /bin/true")
+        %w(udf vfat).each do |fs|
+          expect(chef_run).to render_file('/etc/modprobe.d/dev-sec.conf')
+            .with_content("install #{fs} /bin/true")
         end
 
-        expect(chef_run).not_to render_file('/etc/modprobe.d/dev-sec.conf').
-          with_content('install cramfs /bin/true')
+        expect(chef_run).not_to render_file('/etc/modprobe.d/dev-sec.conf')
+          .with_content('install cramfs /bin/true')
       end
     end
 
     describe 'when unused filesystems are not disabled' do
-      let(:disable_filesystems) { %w[] }
+      let(:disable_filesystems) { %w() }
 
       it 'should delete the modprobe file' do
         expect(chef_run).to delete_file('/etc/modprobe.d/dev-sec.conf')
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 0e6b3dfd..5a1b8a72 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 #
-# Copyright 2014, Deutsche Telekom AG
+# Copyright:: 2014, Deutsche Telekom AG
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -22,7 +22,6 @@
 
 # coverage report
 Coveralls.wear!
-at_exit { ChefSpec::Coverage.report! }
 
 RSpec.configure do |config|
   # OS and version for mocking of ohai data, needed by chefspec
diff --git a/test/fixtures/cookbooks/test/metadata.rb b/test/fixtures/cookbooks/test/metadata.rb
index ac1e5647..a1f860b8 100644
--- a/test/fixtures/cookbooks/test/metadata.rb
+++ b/test/fixtures/cookbooks/test/metadata.rb
@@ -3,5 +3,4 @@
 maintainer_email 'artem@posteo.de'
 license 'Apache-2.0'
 description 'Test preparation cookbook'
-long_description 'Test preparation cookbook'
 version '0.1.0'
diff --git a/test/fixtures/cookbooks/test/recipes/default.rb b/test/fixtures/cookbooks/test/recipes/default.rb
index 7856de62..eb632ad1 100644
--- a/test/fixtures/cookbooks/test/recipes/default.rb
+++ b/test/fixtures/cookbooks/test/recipes/default.rb
@@ -1,11 +1,11 @@
 #
-# Cookbook Name:: test
+# Cookbook:: test
 # Recipe:: default
 #
 
 # We use this test cookbook to initialize the test environment
 
-if node['platform_family'] == 'debian'
+if platform_family?('debian')
   # Run apt-get update if we are on debian, some images/boxes do not have full package lists
   execute 'apt update' do
     command 'apt-get update'