diff --git a/manifests/mon.pp b/manifests/mon.pp
index 43c35d7e..22c864d7 100644
--- a/manifests/mon.pp
+++ b/manifests/mon.pp
@@ -85,9 +85,7 @@ define ceph::mon (
         status   => "service ceph status mon.${id}",
       }
     } else {
-      if ! $public_addr {
-        fail("operatingsystem = ${::operatingsystem} is not supported")
-      }
+      fail("operatingsystem = ${::operatingsystem} is not supported")
     }
 
     $mon_service = "ceph-mon-${id}"
diff --git a/spec/classes/ceph_mons_spec.rb b/spec/classes/ceph_mons_spec.rb
index a40594ea..fbac98c4 100644
--- a/spec/classes/ceph_mons_spec.rb
+++ b/spec/classes/ceph_mons_spec.rb
@@ -49,6 +49,7 @@ describe 'ceph::mons' do
   describe 'Ubuntu' do
     let :facts do
       {
+        :osfamily => 'Debian',
         :operatingsystem => 'Ubuntu',
       }
     end
@@ -59,6 +60,7 @@ describe 'ceph::mons' do
   describe 'Debian' do
     let :facts do
       {
+        :osfamily => 'Debian',
         :operatingsystem => 'Debian',
       }
     end
@@ -69,6 +71,7 @@ describe 'ceph::mons' do
   describe 'RedHat' do
     let :facts do
       {
+        :osfamily => 'RedHat',
         :operatingsystem => 'RedHat',
       }
     end
diff --git a/spec/defines/ceph_mon_spec.rb b/spec/defines/ceph_mon_spec.rb
index f421a17b..c3817f4a 100644
--- a/spec/defines/ceph_mon_spec.rb
+++ b/spec/defines/ceph_mon_spec.rb
@@ -28,6 +28,7 @@ describe 'ceph::mon' do
 
       let :facts do
         {
+          :osfamily => 'Debian',
           :operatingsystem => 'Ubuntu',
         }
       end
@@ -61,8 +62,8 @@ touch /etc/ceph/ceph.client.admin.keyring"
 
       let :facts do
         {
+          :osfamily => 'RedHat',
           :operatingsystem => 'RHEL6',
-          :hostname => 'first',
         }
       end
 
@@ -78,6 +79,11 @@ touch /etc/ceph/ceph.client.admin.keyring"
       end
 
       it { should contain_service('ceph-mon-A').with('ensure' => "running") }
+      it { should contain_exec('ceph-mon-ceph.client.admin.keyring-A').with(
+         'command' => "/bin/true # comment to satisfy puppet syntax requirements
+set -ex
+touch /etc/ceph/ceph.client.admin.keyring"
+       ) }
 
 #      it { p subject.resources }