diff --git a/spec/classes/munin_master_spec.rb b/spec/classes/munin_master_spec.rb
index b1466d9..fc892a0 100644
--- a/spec/classes/munin_master_spec.rb
+++ b/spec/classes/munin_master_spec.rb
@@ -1,196 +1,196 @@
 require 'spec_helper'
 
 t_conf_dir = {}
 t_conf_dir.default = '/etc/munin'
 t_conf_dir['Solaris'] = '/opt/local/etc/munin'
 t_conf_dir['FreeBSD'] = '/usr/local/etc/munin'
 
 t_package = {}
 t_package.default = 'munin'
 t_package['FreeBSD'] = 'munin-master'
 
 describe 'munin::master' do
   on_supported_os.each do |os, facts|
     # Avoid testing on distributions similar to RedHat and Debian
     next if os =~ %r{^(ubuntu|centos|scientific|oraclelinux)-}
 
     # No need to test all os versions as long as os version is not
     # used in the params class
     next if os =~ %r{^(debian-[67]|redhat-[56]|freebsd-9)-}
 
     context "on #{os}" do
       let(:facts) do
         facts
       end
 
       conf_dir = t_conf_dir[facts[:osfamily]]
       package = t_package[facts[:osfamily]]
 
       it { is_expected.to compile.with_all_deps }
 
       it { is_expected.to contain_package(package) }
 
       context 'with default params' do
         it do
           is_expected.to contain_file("#{conf_dir}/munin.conf")
             .with_content(%r{graph_strategy\s+cgi})
             .with_content(%r{html_strategy\s+cgi})
         end
 
         it do
           is_expected.to contain_file("#{conf_dir}/munin-conf.d")
             .with_ensure('directory')
         end
       end
 
       context 'with html_strategy => cron' do
         let(:params) { { html_strategy: 'cron' } }
 
         it { is_expected.to compile.with_all_deps }
         it do
           is_expected.to contain_file("#{conf_dir}/munin.conf")
             .with_content(%r{html_strategy\s+cron})
         end
       end
 
       context 'with graph_strategy => cron' do
         let(:params) { { graph_strategy: 'cron' } }
 
         it { is_expected.to compile.with_all_deps }
         it do
           is_expected.to contain_file("#{conf_dir}/munin.conf")
             .with_content(%r{graph_strategy\s+cron})
         end
       end
 
       context 'with dbdir => /var/lib/munin' do
         let(:params) { { dbdir: '/var/lib/munin' } }
 
         it { is_expected.to compile.with_all_deps }
         it do
           is_expected.to contain_file("#{conf_dir}/munin.conf")
             .with_content(%r{dbdir\s+/var/lib/munin})
         end
       end
 
       context 'with htmldir => /var/www/munin' do
         let(:params) { { htmldir: '/var/www/munin' } }
 
         it { is_expected.to compile.with_all_deps }
         it do
           is_expected.to contain_file("#{conf_dir}/munin.conf")
             .with_content(%r{htmldir\s+/var/www/munin})
         end
       end
 
       context 'with logdir => /var/log/munin' do
         let(:params) { { dbdir: '/var/log/munin' } }
 
         it { is_expected.to compile.with_all_deps }
         it do
           is_expected.to contain_file("#{conf_dir}/munin.conf")
             .with_content(%r{dbdir\s+/var/log/munin})
         end
       end
 
       context 'with rundir => /var/run/munin' do
         let(:params) { { dbdir: '/var/run/munin' } }
 
         it { is_expected.to compile.with_all_deps }
         it do
           is_expected.to contain_file("#{conf_dir}/munin.conf")
             .with_content(%r{dbdir\s+/var/run/munin})
         end
       end
 
       context 'with tls => enabled' do
         let(:params) do
           {
             tls: 'enabled',
             tls_certificate: '/path/to/certificate.pem',
             tls_private_key: '/path/to/key.pem',
             tls_verify_certificate: 'yes',
           }
         end
 
         it { is_expected.to compile.with_all_deps }
         it do
           is_expected.to contain_file("#{conf_dir}/munin.conf")
             .with_content(%r{tls = enabled})
             .with_content(%r{tls_certificate = /path/to/certificate\.pem})
             .with_content(%r{tls_private_key = /path/to/key\.pem})
             .with_content(%r{tls_verify_certificate = yes})
         end
       end
 
       context 'with node_definitions' do
         let(:params) do
           {
             node_definitions: {
               'node-a' => {
                 'address' => 'munin://node-a.example.com',
               },
               'node-b' => {
                 'address' => 'munin://node-b.example.com',
               },
             },
           }
         end
 
         it { is_expected.to compile.with_all_deps }
         it { is_expected.to contain_munin__master__node_definition('node-a') }
         it { is_expected.to contain_munin__master__node_definition('node-b') }
       end
 
       context 'with extra_config' do
         token = '1b7febce-bb2d-4c18-b889-84c73538a900'
         let(:params) do
           { extra_config: [token] }
         end
 
         it { is_expected.to compile.with_all_deps }
         it do
           is_expected.to contain_file("#{conf_dir}/munin.conf")
             .with_content(%r{#{token}})
         end
       end
 
       context 'with extra_config set to a string' do
         token = '1b7febce-bb2d-4c18-b889-84c73538a900'
         let(:params) do
           { extra_config: token }
         end
 
         it { is_expected.to raise_error(Puppet::Error, %r{is not an Array}) }
       end
 
       ['test.example.com', 'invalid/hostname.example.com'].each do |param|
         context "with host_name => #{param}" do
           let(:params) do
             { host_name: param }
           end
 
           if param =~ %r{invalid}
             it { is_expected.to raise_error(Puppet::Error, %r{valid domain name}) }
           else
             it { is_expected.to compile.with_all_deps }
           end
         end
       end
 
-      %w[enabled disabled mine unclaimed invalid].each do |param|
+      ['enabled', 'disabled', 'mine', 'unclaimed', 'invalid'].each do |param|
         context "with collect_nodes => #{param}" do
           let(:params) do
             { collect_nodes: param }
           end
 
           if param == 'invalid'
             it { is_expected.to raise_error(Puppet::Error, %r{validate_re}) }
           else
             it { is_expected.to compile.with_all_deps }
           end
         end
       end
     end
   end
 end