diff --git a/spec/classes/munin_node_spec.rb b/spec/classes/munin_node_spec.rb
index da3c37e..9e8d0db 100644
--- a/spec/classes/munin_node_spec.rb
+++ b/spec/classes/munin_node_spec.rb
@@ -1,60 +1,79 @@
 require 'spec_helper'
 
 describe 'munin::node' do
 
   [ :CentOS, :Debian, :RedHat, :Ubuntu ].each do |sc|
     context "Check for supported operatingsystem #{sc}" do
       include_context sc
       it { should compile }
       it { should contain_class('munin::node') }
       it {
         should contain_package('munin-node')
         should contain_service('munin-node')
         should contain_file('/etc/munin/munin-node.conf')
       }
     end
   end
 
   [ :SmartOS ].each do |sc|
     context "Check for supported operatingsystem #{sc}" do
       include_context sc
       it { should compile }
       it { should contain_class('munin::node') }
       it {
         should contain_package('munin-node')
         should contain_service('smf:/munin-node')
         should contain_file('/opt/local/etc/munin/munin-node.conf')
       }
     end
   end
 
   context 'unsupported' do
     include_context :unsupported
     it {
       expect {
         should contain_class('munin::node')
       }.to raise_error(Puppet::Error, /Unsupported osfamily/)
     }
   end
 
   context 'acl with ipv4 and ipv6 addresses' do
     include_context :Debian
     let(:params) do
       { allow: ['2001:db8:1::',
                 '2001:db8:2::/64',
                 '192.0.2.129',
                 '192.0.2.0/25',
                 '192\.0\.2']
       }
     end
     it do
       should contain_file('/etc/munin/munin-node.conf')
         .with_content(/^cidr_allow 192.0.2.0\/25$/)
         .with_content(/^cidr_allow 2001:db8:2::\/64$/)
         .with_content(/^allow \^192\\.0\\.2\\.129\$$/)
         .with_content(/^allow 192\\.0\\.2$/)
         .with_content(/^allow \^2001:db8:1::\$$/)
     end
   end
 
+  context 'with host_name unset' do
+    include_context :Debian
+    it do
+      should contain_file('/etc/munin/munin-node.conf')
+              .with_content(/host_name\s+testnode.example.com/)
+    end
+  end
+
+  context 'with host_name set' do
+    include_context :Debian
+    let(:params) do
+      { host_name: 'something.example.com' }
+    end
+    it do
+      should contain_file('/etc/munin/munin-node.conf')
+              .with_content(/host_name\s+something.example.com/)
+    end
+  end
+
 end