diff --git a/spec/classes/designate_agent_spec.rb b/spec/classes/designate_agent_spec.rb
index 5c74454c..7dad14a1 100644
--- a/spec/classes/designate_agent_spec.rb
+++ b/spec/classes/designate_agent_spec.rb
@@ -26,6 +26,7 @@ describe 'designate::agent' do
         )
       end
 
+
       it 'configures designate-agent with default parameters' do
         is_expected.to contain_designate_config('service:agent/backend_driver').with_value('bind9')
       end
@@ -37,53 +38,45 @@ describe 'designate::agent' do
         end
       end
     end
+
+    context 'with custom package name' do
+      before do
+        params.merge!({ :agent_package_name => 'designate-agent-custom-name' })
+      end
+
+      it 'configures using custom name' do
+        is_expected.to contain_package('designate-agent').with(
+          :name      => 'designate-agent-custom-name',
+          :ensure    => 'present',
+          :tag       => ['openstack', 'designate-package'],
+        )
+      end
+    end
   end
 
-  context 'on Debian platforms' do
-    let :facts do
-      { :osfamily => 'Debian' }
+  on_supported_os({
+    :supported_os => OSDefaults.get_supported_os
+  }).each do |os,facts|
+    context "on #{os}" do
+      let (:facts) do
+        facts.merge!(OSDefaults.get_facts())
+      end
+
+      let(:platform_params) do
+        case facts[:osfamily]
+        when 'Debian'
+          {
+            :agent_package_name => 'designate-agent',
+            :agent_service_name => 'designate-agent'
+          }
+        when 'RedHat'
+          {
+            :agent_package_name => 'openstack-designate-agent',
+            :agent_service_name => 'openstack-designate-agent'
+          }
+        end
+      end
+      it_behaves_like 'designate-agent'
     end
-
-    let :platform_params do
-      {
-        :agent_package_name => 'designate-agent',
-        :agent_service_name => 'designate-agent'
-      }
-    end
-
-    it_configures 'designate-agent'
-  end
-
-  context 'on RedHat platforms' do
-    let :facts do
-      { :osfamily => 'RedHat' }
-    end
-
-    let :platform_params do
-      {
-        :agent_package_name => 'openstack-designate-agent',
-        :agent_service_name => 'openstack-designate-agent'
-      }
-    end
-
-    it_configures 'designate-agent'
-  end
-
-  context 'with custom package name' do
-    let :facts do
-      { :osfamily => 'RedHat' }
-    end
-
-    let :platform_params do
-      { :agent_package_name => 'designate-agent-custom-name',
-        :agent_service_name => 'openstack-designate-agent'
-      }
-    end
-
-    before do
-      params.merge!({ :agent_package_name => 'designate-agent-custom-name' })
-    end
-
-    it_configures 'designate-agent'
   end
 end
diff --git a/spec/classes/designate_api_spec.rb b/spec/classes/designate_api_spec.rb
index 0cb87b04..87ca5d72 100644
--- a/spec/classes/designate_api_spec.rb
+++ b/spec/classes/designate_api_spec.rb
@@ -51,53 +51,45 @@ describe 'designate::api' do
         end
       end
     end
+
+    context 'with custom package name' do
+      before do
+        params.merge!({ :api_package_name => 'designate-api-custom-name' })
+      end
+
+      it 'configures using custom name' do
+        is_expected.to contain_package('designate-api').with(
+          :name      => 'designate-api-custom-name',
+          :ensure    => 'present',
+          :tag       => ['openstack', 'designate-package'],
+        )
+      end
+    end
   end
 
-  context 'on Debian platforms' do
-    let :facts do
-      { :osfamily => 'Debian' }
+  on_supported_os({
+    :supported_os => OSDefaults.get_supported_os
+  }).each do |os,facts|
+    context "on #{os}" do
+      let (:facts) do
+        facts.merge!(OSDefaults.get_facts())
+      end
+
+      let(:platform_params) do
+        case facts[:osfamily]
+        when 'Debian'
+          {
+            :api_package_name => 'designate-api',
+            :api_service_name => 'designate-api'
+          }
+        when 'RedHat'
+          {
+            :api_package_name => 'openstack-designate-api',
+            :api_service_name => 'openstack-designate-api'
+          }
+        end
+      end
+      it_behaves_like 'designate-api'
     end
-
-    let :platform_params do
-      {
-        :api_package_name => 'designate-api',
-        :api_service_name => 'designate-api'
-      }
-    end
-
-    it_configures 'designate-api'
-  end
-
-  context 'on RedHat platforms' do
-    let :facts do
-      { :osfamily => 'RedHat' }
-    end
-
-    let :platform_params do
-      {
-        :api_package_name => 'openstack-designate-api',
-        :api_service_name => 'openstack-designate-api'
-      }
-    end
-
-    it_configures 'designate-api'
-  end
-
-  context 'with custom package name' do
-    let :facts do
-      { :osfamily => 'RedHat' }
-    end
-
-    let :platform_params do
-      { :api_package_name => 'designate-api-custom-name',
-        :api_service_name => 'openstack-designate-api'
-      }
-    end
-
-    before do
-      params.merge!({ :api_package_name => 'designate-api-custom-name' })
-    end
-
-    it_configures 'designate-api'
   end
 end
diff --git a/spec/classes/designate_backend_bind9_spec.rb b/spec/classes/designate_backend_bind9_spec.rb
index 22994d10..d4323388 100644
--- a/spec/classes/designate_backend_bind9_spec.rb
+++ b/spec/classes/designate_backend_bind9_spec.rb
@@ -5,44 +5,61 @@ require 'spec_helper'
 
 describe 'designate::backend::bind9' do
 
-  let :facts do
-    {
-      :osfamily => 'Debian',
-      :concat_basedir => '/var/lib/puppet/concat',
-    }
-  end
+  shared_examples 'designate-backend-bind9' do
+    context 'with default params' do
+      it 'configures designate backend bind9 with default parameters' do
+        is_expected.to contain_designate_config('backend:bind9/rndc_host').with_value('127.0.0.1')
+        is_expected.to contain_designate_config('backend:bind9/rndc_port').with_value('953')
+        is_expected.to contain_designate_config('backend:bind9/rndc_config_file').with_value('/etc/rndc.conf')
+        is_expected.to contain_designate_config('backend:bind9/rndc_key_file').with_value('/etc/rndc.key')
+        is_expected.to contain_file_line('dns allow-new-zones')
+      end
+    end
 
-  context 'with default params' do
-    it 'configures designate backend bind9 with default parameters' do
-      is_expected.to contain_designate_config('backend:bind9/rndc_host').with_value('127.0.0.1')
-      is_expected.to contain_designate_config('backend:bind9/rndc_port').with_value('953')
-      is_expected.to contain_designate_config('backend:bind9/rndc_config_file').with_value('/etc/rndc.conf')
-      is_expected.to contain_designate_config('backend:bind9/rndc_key_file').with_value('/etc/rndc.key')
-      is_expected.to contain_file_line('dns allow-new-zones')
+    context 'when overriding rndc_config_file' do
+      let :params do
+        { :rndc_config_file => '/srv/designate/rndc.conf' }
+      end
+
+      it 'configures designate bind9 backend with custom rndc_config_file' do
+        is_expected.to contain_designate_config('backend:bind9/rndc_config_file').with_value(params[:rndc_config_file])
+      end
+    end
+
+    context 'when overriding rndc_host and rndc_port' do
+      let :params do
+        {
+          :rndc_host => '10.0.0.42',
+          :rndc_port => '1337'
+        }
+      end
+
+      it 'configures designate bind9 backend with custom rndc_port and rndc_host' do
+        is_expected.to contain_designate_config('backend:bind9/rndc_port').with_value(params[:rndc_port])
+        is_expected.to contain_designate_config('backend:bind9/rndc_host').with_value(params[:rndc_host])
+      end
     end
   end
 
-  context 'when overriding rndc_config_file' do
-    let :params do
-      { :rndc_config_file => '/srv/designate/rndc.conf' }
-    end
+  on_supported_os({
+    :supported_os => OSDefaults.get_supported_os
+  }).each do |os,facts|
+    context "on #{os}" do
+      let (:facts) do
+        facts.merge!(OSDefaults.get_facts({
+          :concat_basedir => '/var/lib/puppet/concat',
+        }))
+      end
 
-    it 'configures designate bind9 backend with custom rndc_config_file' do
-      is_expected.to contain_designate_config('backend:bind9/rndc_config_file').with_value(params[:rndc_config_file])
-    end
-  end
-
-  context 'when overriding rndc_host and rndc_port' do
-    let :params do
-      {
-        :rndc_host => '10.0.0.42',
-        :rndc_port => '1337'
-      }
-    end
-
-    it 'configures designate bind9 backend with custom rndc_port and rndc_host' do
-      is_expected.to contain_designate_config('backend:bind9/rndc_port').with_value(params[:rndc_port])
-      is_expected.to contain_designate_config('backend:bind9/rndc_host').with_value(params[:rndc_host])
+      let(:platform_params) do
+        case facts[:osfamily]
+        when 'Debian'
+          { }
+        when 'RedHat'
+          { }
+        end
+      end
+      it_behaves_like 'designate-backend-bind9'
     end
   end
 
diff --git a/spec/classes/designate_backend_powerdns_spec.rb b/spec/classes/designate_backend_powerdns_spec.rb
index a79f5a1f..9fbcf8b3 100644
--- a/spec/classes/designate_backend_powerdns_spec.rb
+++ b/spec/classes/designate_backend_powerdns_spec.rb
@@ -5,28 +5,46 @@ require 'spec_helper'
 
 describe 'designate::backend::powerdns' do
 
-  let :facts do
-    { :osfamily => 'Debian' }
-  end
-
   let :params do
     { :database_connection => 'mysql://dbserver' }
   end
 
-  context 'with default params' do
-    it 'configures designate backend powerdns with default parameters' do
-      is_expected.to contain_designate_config('backend:powerdns/connection').with_value('mysql://dbserver')
-      is_expected.to contain_designate_config('backend:powerdns/use_db_reconnect').with_value(true)
-      is_expected.to contain_file('/var/lib/designate').with(
-        'ensure' => 'directory',
-        'owner'  => 'designate',
-        'group'  => 'designate',
-        'mode'   => '0750',
-      )
-    end
+  shared_examples 'designate-backend-powerdns' do
+    context 'with default params' do
+      it 'configures designate backend powerdns with default parameters' do
+        is_expected.to contain_designate_config('backend:powerdns/connection').with_value('mysql://dbserver')
+        is_expected.to contain_designate_config('backend:powerdns/use_db_reconnect').with_value(true)
+        is_expected.to contain_file('/var/lib/designate').with(
+          'ensure' => 'directory',
+          'owner'  => 'designate',
+          'group'  => 'designate',
+          'mode'   => '0750',
+        )
+      end
 
-    it 'includes designate::db::powerdns::sync' do
-      is_expected.to contain_class('designate::db::powerdns::sync')
+      it 'includes designate::db::powerdns::sync' do
+        is_expected.to contain_class('designate::db::powerdns::sync')
+      end
+    end
+  end
+
+  on_supported_os({
+    :supported_os => OSDefaults.get_supported_os
+  }).each do |os,facts|
+    context "on #{os}" do
+      let (:facts) do
+        facts.merge!(OSDefaults.get_facts())
+      end
+
+      let(:platform_params) do
+        case facts[:osfamily]
+        when 'Debian'
+          { }
+        when 'RedHat'
+          { }
+        end
+      end
+      it_behaves_like 'designate-backend-powerdns'
     end
   end
 
diff --git a/spec/classes/designate_central_spec.rb b/spec/classes/designate_central_spec.rb
index a8fce593..db4da7da 100644
--- a/spec/classes/designate_central_spec.rb
+++ b/spec/classes/designate_central_spec.rb
@@ -42,53 +42,46 @@ describe 'designate::central' do
         end
       end
     end
+
+    context 'with custom package name' do
+      before do
+        params.merge!({ :central_package_name => 'designate-central-custom-name' })
+      end
+
+      it 'configures using custom name' do
+        is_expected.to contain_package('designate-central').with(
+          :name      => 'designate-central-custom-name',
+          :ensure    => 'present',
+          :tag       => ['openstack', 'designate-package'],
+        )
+      end
+    end
   end
 
-  context 'on Debian platforms' do
-    let :facts do
-      { :osfamily => 'Debian' }
-    end
+  on_supported_os({
+    :supported_os => OSDefaults.get_supported_os
+  }).each do |os,facts|
+    context "on #{os}" do
+      let (:facts) do
+        facts.merge!(OSDefaults.get_facts())
+      end
 
-    let :platform_params do
-      {
-        :central_package_name => 'designate-central',
-        :central_service_name => 'designate-central'
-      }
+      let(:platform_params) do
+        case facts[:osfamily]
+        when 'Debian'
+          {
+            :central_package_name => 'designate-central',
+            :central_service_name => 'designate-central'
+          }
+        when 'RedHat'
+          {
+            :central_package_name => 'openstack-designate-central',
+            :central_service_name => 'openstack-designate-central'
+          }
+        end
+      end
+      it_behaves_like 'designate-central'
     end
-
-    it_configures 'designate-central'
   end
 
-  context 'on RedHat platforms' do
-    let :facts do
-      { :osfamily => 'RedHat' }
-    end
-
-    let :platform_params do
-      {
-        :central_package_name => 'openstack-designate-central',
-        :central_service_name => 'openstack-designate-central'
-      }
-    end
-
-    it_configures 'designate-central'
-  end
-
-  context 'with custom package name' do
-    let :facts do
-      { :osfamily => 'RedHat' }
-    end
-
-    let :platform_params do
-      { :central_package_name => 'designate-central-custom-name',
-        :central_service_name => 'openstack-designate-central'
-      }
-    end
-
-    before do
-      params.merge!({ :central_package_name => 'designate-central-custom-name' })
-    end
-
-    it_configures 'designate-central'
-  end
 end
diff --git a/spec/classes/designate_client_spec.rb b/spec/classes/designate_client_spec.rb
index 7e2c5104..7000e07a 100644
--- a/spec/classes/designate_client_spec.rb
+++ b/spec/classes/designate_client_spec.rb
@@ -4,57 +4,56 @@
 require 'spec_helper'
 
 describe 'designate::client' do
+  let :params do
+    { }
+  end
 
   shared_examples 'designate-client' do
 
-    it { is_expected.to contain_class('designate::params') }
+    context 'with default parameters' do
+      it { is_expected.to contain_class('designate::params') }
 
-    it 'installs designate client package' do
-      is_expected.to contain_package('python-designateclient').with(
-        :ensure => 'present',
-        :name   => platform_params[:client_package_name],
-        :tag    => 'openstack'
-      )
+      it 'installs designate client package' do
+        is_expected.to contain_package('python-designateclient').with(
+          :ensure => 'present',
+          :name   => platform_params[:client_package_name],
+          :tag    => 'openstack'
+        )
+      end
+    end
+
+    context 'with custom package name' do
+      before do
+        params.merge!({ :client_package_name => 'designate-client-custom-name' })
+      end
+
+      it 'configures using custom name' do
+        is_expected.to contain_package('python-designateclient').with(
+          :ensure    => 'present',
+          :name      => 'designate-client-custom-name',
+          :tag       => 'openstack',
+        )
+      end
     end
   end
 
-  context 'on Debian platforms' do
-    let :facts do
-      { :osfamily => 'Debian' }
+  on_supported_os({
+    :supported_os => OSDefaults.get_supported_os
+  }).each do |os,facts|
+    context "on #{os}" do
+      let (:facts) do
+        facts.merge!(OSDefaults.get_facts())
+      end
+
+      let(:platform_params) do
+        case facts[:osfamily]
+        when 'Debian'
+          { :client_package_name => 'python-designateclient' }
+        when 'RedHat'
+          { :client_package_name => 'python-designateclient' }
+        end
+      end
+      it_behaves_like 'designate-client'
     end
-
-    let :platform_params do
-      { :client_package_name => 'python-designateclient' }
-    end
-
-    it_configures 'designate-client'
-  end
-
-  context 'on RedHat platforms' do
-    let :facts do
-      { :osfamily => 'RedHat' }
-    end
-
-    let :platform_params do
-      { :client_package_name => 'python-designateclient' }
-    end
-
-    it_configures 'designate-client'
-  end
-
-  context 'with custom package name' do
-    let :facts do
-      { :osfamily => 'RedHat' }
-    end
-
-    let :platform_params do
-      { :client_package_name => 'designate-client-custom-name' }
-    end
-
-    let :params do
-      { :client_package_name => 'designate-client-custom-name' }
-    end
-
-    it_configures 'designate-client'
   end
 end
diff --git a/spec/classes/designate_config_spec.rb b/spec/classes/designate_config_spec.rb
index 849f6a1b..1e91f246 100644
--- a/spec/classes/designate_config_spec.rb
+++ b/spec/classes/designate_config_spec.rb
@@ -1,7 +1,6 @@
 require 'spec_helper'
 
 describe 'designate::config' do
-
   let :params do
     { :designate_config => {
         'DEFAULT/foo' => { 'value'  => 'fooValue' },
@@ -23,23 +22,38 @@ describe 'designate::config' do
     }
   end
 
-  it 'configures arbitrary designate configurations' do
-    is_expected.to contain_designate_config('DEFAULT/foo').with_value('fooValue')
-    is_expected.to contain_designate_config('DEFAULT/bar').with_value('barValue')
-    is_expected.to contain_designate_config('DEFAULT/baz').with_ensure('absent')
+
+  shared_examples_for 'designate-config' do
+    it 'configures arbitrary designate configurations' do
+      is_expected.to contain_designate_config('DEFAULT/foo').with_value('fooValue')
+      is_expected.to contain_designate_config('DEFAULT/bar').with_value('barValue')
+      is_expected.to contain_designate_config('DEFAULT/baz').with_ensure('absent')
+    end
+
+    it 'configures arbitrary designate api-paste configurations' do
+      is_expected.to contain_designate_api_paste_ini('DEFAULT/foo2').with_value('fooValue')
+      is_expected.to contain_designate_api_paste_ini('DEFAULT/bar2').with_value('barValue')
+      is_expected.to contain_designate_api_paste_ini('DEFAULT/baz2').with_ensure('absent')
+    end
+
+    it 'configures arbitrary designate rootwrap configurations' do
+      is_expected.to contain_designate_rootwrap_config('DEFAULT/filters_path').with_value('/etc/designate/rootwrap.d,/usr/share/designate/rootwrap')
+      is_expected.to contain_designate_rootwrap_config('DEFAULT/exec_dirs').with_value('/sbin,/usr/sbin,/bin,/usr/bin')
+      is_expected.to contain_designate_rootwrap_config('DEFAULT/use_syslog').with_value('False')
+      is_expected.to contain_designate_rootwrap_config('DEFAULT/syslog_log_facility').with_value('syslog')
+      is_expected.to contain_designate_rootwrap_config('DEFAULT/syslog_log_level').with_value('ERROR')
+    end
   end
 
-  it 'configures arbitrary designate api-paste configurations' do
-    is_expected.to contain_designate_api_paste_ini('DEFAULT/foo2').with_value('fooValue')
-    is_expected.to contain_designate_api_paste_ini('DEFAULT/bar2').with_value('barValue')
-    is_expected.to contain_designate_api_paste_ini('DEFAULT/baz2').with_ensure('absent')
-  end
+  on_supported_os({
+    :supported_os => OSDefaults.get_supported_os
+  }).each do |os,facts|
+    context "on #{os}" do
+      let (:facts) do
+        facts.merge!(OSDefaults.get_facts())
+      end
 
-  it 'configures arbitrary designate rootwrap configurations' do
-    is_expected.to contain_designate_rootwrap_config('DEFAULT/filters_path').with_value('/etc/designate/rootwrap.d,/usr/share/designate/rootwrap')
-    is_expected.to contain_designate_rootwrap_config('DEFAULT/exec_dirs').with_value('/sbin,/usr/sbin,/bin,/usr/bin')
-    is_expected.to contain_designate_rootwrap_config('DEFAULT/use_syslog').with_value('False')
-    is_expected.to contain_designate_rootwrap_config('DEFAULT/syslog_log_facility').with_value('syslog')
-    is_expected.to contain_designate_rootwrap_config('DEFAULT/syslog_log_level').with_value('ERROR')
+      it_behaves_like 'designate-config'
+    end
   end
 end
diff --git a/spec/classes/designate_db_mysql_spec.rb b/spec/classes/designate_db_mysql_spec.rb
index 1d2d796c..09cdaaf1 100644
--- a/spec/classes/designate_db_mysql_spec.rb
+++ b/spec/classes/designate_db_mysql_spec.rb
@@ -1,4 +1,3 @@
-require 'spec_helper'
 
 describe 'designate::db::mysql' do
 
@@ -10,11 +9,7 @@ describe 'designate::db::mysql' do
     { :password => "qwerty" }
   end
 
-  context 'on a Debian osfamily' do
-    let :facts do
-      { :osfamily => "Debian" }
-    end
-
+  shared_examples_for 'designate-db-mysql' do
     context 'with only required parameters' do
       let :params do
         required_params
@@ -60,44 +55,25 @@ describe 'designate::db::mysql' do
 
       it { is_expected.to contain_openstacklib__db__mysql('designate').with_charset(params[:charset]) }
     end
+
+    context 'overriding allowed_hosts param with array' do
+      let :params do
+        { :allowed_hosts  => ['127.0.0.1','%'] }.merge(required_params)
+      end
+
+      it { is_expected.to contain_openstacklib__db__mysql('designate').with_allowed_hosts(params[:allowed_hosts]) }
+    end
   end
 
-  describe "overriding allowed_hosts param to array" do
-    let :facts do
-      { :osfamily => "Debian" }
-    end
-    let :params do
-      {
-        :password       => 'designatepass',
-        :allowed_hosts  => ['127.0.0.1','%']
-      }
-    end
+  on_supported_os({
+    :supported_os => OSDefaults.get_supported_os
+  }).each do |os,facts|
+    context "on #{os}" do
+      let (:facts) do
+        facts.merge!(OSDefaults.get_facts())
+      end
 
-  end
-
-  describe "overriding allowed_hosts param to string" do
-    let :facts do
-      { :osfamily => 'RedHat' }
+      it_behaves_like 'designate-db-mysql'
     end
-    let :params do
-      {
-        :password       => 'designatepass2',
-        :allowed_hosts  => '192.168.1.1'
-      }
-    end
-
-  end
-
-  describe "overriding allowed_hosts param equals to host param " do
-    let :facts do
-      { :osfamily => 'RedHat' }
-    end
-    let :params do
-      {
-        :password       => 'designatepass2',
-        :allowed_hosts  => '127.0.0.1'
-      }
-    end
-
   end
 end
diff --git a/spec/classes/designate_db_powerdns_mysql_spec.rb b/spec/classes/designate_db_powerdns_mysql_spec.rb
index a2a74962..3f273a98 100644
--- a/spec/classes/designate_db_powerdns_mysql_spec.rb
+++ b/spec/classes/designate_db_powerdns_mysql_spec.rb
@@ -10,12 +10,9 @@ describe 'designate::db::powerdns::mysql' do
     { :password => "qwerty" }
   end
 
-  context 'on a Debian osfamily' do
-    let :facts do
-      { :osfamily => "Debian" }
-    end
 
-    context 'with only required parameters' do
+  shared_examples_for 'designate-db-powerdns-mysql' do
+    context 'with default params' do
       let :params do
         required_params
       end
@@ -31,73 +28,36 @@ describe 'designate::db::powerdns::mysql' do
       let :params do
         { :charset => 'latin1' }.merge(required_params)
       end
-
       it { is_expected.to contain_openstacklib__db__mysql('powerdns').with_charset(params[:charset]) }
     end
-  end
 
-  context 'on a RedHat osfamily' do
-    let :facts do
-      { :osfamily => 'RedHat' }
-    end
-
-    context 'with only required parameters' do
+    context 'overriding allowed_hosts param with string' do
       let :params do
-        required_params
+        { :allowed_hosts  => '127.0.0.1' }.merge(required_params)
       end
 
-      it { is_expected.to contain_openstacklib__db__mysql('powerdns').with(
-        :user          => 'powerdns',
-        :password_hash => '*AA1420F182E88B9E5F874F6FBE7459291E8F4601',
-        :charset       => 'utf8'
-      )}
+      it { is_expected.to contain_openstacklib__db__mysql('powerdns').with_allowed_hosts(params[:allowed_hosts]) }
     end
 
-    context 'when overriding charset' do
+    context 'overriding allowed_hosts param with array' do
       let :params do
-        { :charset => 'latin1' }.merge(required_params)
+        { :allowed_hosts  => ['127.0.0.1','%'] }.merge(required_params)
       end
 
-      it { is_expected.to contain_openstacklib__db__mysql('powerdns').with_charset(params[:charset]) }
+      it { is_expected.to contain_openstacklib__db__mysql('powerdns').with_allowed_hosts(params[:allowed_hosts]) }
     end
   end
 
-  describe "overriding allowed_hosts param to array" do
-    let :facts do
-      { :osfamily => "Debian" }
-    end
-    let :params do
-      {
-        :password       => 'designatepass',
-        :allowed_hosts  => ['127.0.0.1','%']
-      }
-    end
+  on_supported_os({
+    :supported_os => OSDefaults.get_supported_os
+  }).each do |os,facts|
+    context "on #{os}" do
+      let (:facts) do
+        facts.merge!(OSDefaults.get_facts())
+      end
 
+      it_behaves_like 'designate-db-powerdns-mysql'
+    end
   end
 
-  describe "overriding allowed_hosts param to string" do
-    let :facts do
-      { :osfamily => 'RedHat' }
-    end
-    let :params do
-      {
-        :password       => 'designatepass2',
-        :allowed_hosts  => '192.168.1.1'
-      }
-    end
-
-  end
-
-  describe "overriding allowed_hosts param equals to host param " do
-    let :facts do
-      { :osfamily => 'RedHat' }
-    end
-    let :params do
-      {
-        :password       => 'designatepass2',
-        :allowed_hosts  => '127.0.0.1'
-      }
-    end
-
-  end
 end
diff --git a/spec/classes/designate_db_powerdns_sync_spec.rb b/spec/classes/designate_db_powerdns_sync_spec.rb
index 87eac37d..48e44d42 100644
--- a/spec/classes/designate_db_powerdns_sync_spec.rb
+++ b/spec/classes/designate_db_powerdns_sync_spec.rb
@@ -5,40 +5,50 @@ require 'spec_helper'
 
 describe 'designate::db::powerdns::sync' do
 
-  let :facts do
-    { :osfamily => 'Debian' }
-  end
-
-  it 'runs designate-powerdns-dbsync' do
-    is_expected.to contain_exec('designate-powerdns-dbsync').with(
-      :command     => 'designate-manage  powerdns sync',
-      :path        => '/usr/bin',
-      :user        => 'root',
-      :refreshonly => 'true',
-      :logoutput   => 'on_failure',
-      :subscribe   => 'Anchor[designate::config::end]',
-      :notify      => 'Anchor[designate::service::begin]',
-    )
-  end
-
-  describe 'overriding extra_params' do
-    let :params do
-      {
-        :extra_params => '--config-file /etc/designate/designate.conf'
-      }
+  shared_examples_for 'designate-db-powerdns-sync' do
+    context 'with default parameters' do
+      it 'runs designate-powerdns-dbsync' do
+        is_expected.to contain_exec('designate-powerdns-dbsync').with(
+          :command     => 'designate-manage  powerdns sync',
+          :path        => '/usr/bin',
+          :user        => 'root',
+          :refreshonly => 'true',
+          :logoutput   => 'on_failure',
+          :subscribe   => 'Anchor[designate::config::end]',
+          :notify      => 'Anchor[designate::service::begin]',
+        )
+      end
     end
 
-    it {is_expected.to contain_exec('designate-powerdns-dbsync').with(
-      :command     => 'designate-manage --config-file /etc/designate/designate.conf powerdns sync',
-      :path        => '/usr/bin',
-      :user        => 'root',
-      :refreshonly => 'true',
-      :logoutput   => 'on_failure',
-      :subscribe   => 'Anchor[designate::config::end]',
-      :notify      => 'Anchor[designate::service::begin]',
-    )
-    }
+    context 'with parameter overrides' do
+      let :params do
+        {
+          :extra_params => '--config-file /etc/designate/designate.conf'
+        }
+      end
+      it 'runs designate manage with diffent config' do
+        is_expected.to contain_exec('designate-powerdns-dbsync').with(
+          :command     => 'designate-manage --config-file /etc/designate/designate.conf powerdns sync',
+          :path        => '/usr/bin',
+          :user        => 'root',
+          :refreshonly => 'true',
+          :logoutput   => 'on_failure',
+          :subscribe   => 'Anchor[designate::config::end]',
+          :notify      => 'Anchor[designate::service::begin]',
+        )
+      end
+    end
   end
 
+  on_supported_os({
+    :supported_os => OSDefaults.get_supported_os
+  }).each do |os,facts|
+    context "on #{os}" do
+      let (:facts) do
+        facts.merge!(OSDefaults.get_facts())
+      end
 
+      it_behaves_like 'designate-db-powerdns-sync'
+    end
+  end
 end
diff --git a/spec/classes/designate_db_spec.rb b/spec/classes/designate_db_spec.rb
index a63e651c..1b3546a1 100644
--- a/spec/classes/designate_db_spec.rb
+++ b/spec/classes/designate_db_spec.rb
@@ -60,13 +60,7 @@ describe 'designate::db' do
     end
   end
 
-  context 'on Debian platforms' do
-    let :facts do
-      { :osfamily => 'Debian' }
-    end
-
-    it_configures 'designate::db'
-
+  shared_examples_for 'designate::db on Debian' do
     context 'using pymysql driver' do
       let :params do
         { :database_connection => 'mysql+pymysql://designate:designate@localhost/designate', }
@@ -82,13 +76,8 @@ describe 'designate::db' do
     end
   end
 
-  context 'on RedHat platforms' do
-    let :facts do
-      { :osfamily => 'RedHat' }
-    end
-
-    it_configures 'designate::db'
 
+  shared_examples_for 'designate::db on RedHat' do
     context 'using pymysql driver' do
       let :params do
         { :database_connection  => 'mysql+pymysql://designate:designate@localhost/designate', }
@@ -98,4 +87,21 @@ describe 'designate::db' do
     end
   end
 
+  on_supported_os({
+    :supported_os   => OSDefaults.get_supported_os
+  }).each do |os,facts|
+    context "on #{os}" do
+      let (:facts) do
+        facts.merge!(OSDefaults.get_facts())
+      end
+
+      case facts[:osfamily]
+      when 'Debian'
+        it_configures 'designate::db on Debian'
+      when 'RedHat'
+        it_configures 'designate::db on RedHat'
+      end
+      it_configures 'designate::db'
+    end
+  end
 end
diff --git a/spec/classes/designate_db_sync_spec.rb b/spec/classes/designate_db_sync_spec.rb
index 3d334e2e..38349dd9 100644
--- a/spec/classes/designate_db_sync_spec.rb
+++ b/spec/classes/designate_db_sync_spec.rb
@@ -5,40 +5,50 @@ require 'spec_helper'
 
 describe 'designate::db::sync' do
 
-  let :facts do
-    { :osfamily => 'Debian' }
-  end
-
-  it 'runs designate-dbsync' do
-    is_expected.to contain_exec('designate-dbsync').with(
-      :command     => 'designate-manage  database sync',
-      :path        => '/usr/bin',
-      :user        => 'root',
-      :refreshonly => 'true',
-      :logoutput   => 'on_failure',
-      :subscribe   => 'Anchor[designate::config::end]',
-      :notify      => 'Anchor[designate::service::begin]',
-    )
-  end
-
-  describe 'overriding extra_params' do
-    let :params do
-      {
-        :extra_params => '--config-file /etc/designate/designate.conf'
-      }
+  shared_examples_for 'designate-db-sync' do
+    context 'with default parameters' do
+      it 'runs designate-db-sync' do
+        is_expected.to contain_exec('designate-dbsync').with(
+          :command     => 'designate-manage  database sync',
+          :path        => '/usr/bin',
+          :user        => 'root',
+          :refreshonly => 'true',
+          :logoutput   => 'on_failure',
+          :subscribe   => 'Anchor[designate::config::end]',
+          :notify      => 'Anchor[designate::service::begin]',
+        )
+      end
     end
 
-    it {is_expected.to contain_exec('designate-dbsync').with(
-      :command     => 'designate-manage --config-file /etc/designate/designate.conf database sync',
-      :path        => '/usr/bin',
-      :user        => 'root',
-      :refreshonly => 'true',
-      :logoutput   => 'on_failure',
-      :subscribe   => 'Anchor[designate::config::end]',
-      :notify      => 'Anchor[designate::service::begin]',
-    )
-    }
+    context 'with parameter overrides' do
+      let :params do
+        {
+          :extra_params => '--config-file /etc/designate/designate.conf'
+        }
+      end
+      it 'runs designate manage with diffent config' do
+        is_expected.to contain_exec('designate-dbsync').with(
+          :command     => 'designate-manage --config-file /etc/designate/designate.conf database sync',
+          :path        => '/usr/bin',
+          :user        => 'root',
+          :refreshonly => 'true',
+          :logoutput   => 'on_failure',
+          :subscribe   => 'Anchor[designate::config::end]',
+          :notify      => 'Anchor[designate::service::begin]',
+        )
+      end
+    end
   end
 
+  on_supported_os({
+    :supported_os => OSDefaults.get_supported_os
+  }).each do |os,facts|
+    context "on #{os}" do
+      let (:facts) do
+        facts.merge!(OSDefaults.get_facts())
+      end
 
+      it_behaves_like 'designate-db-sync'
+    end
+  end
 end
diff --git a/spec/classes/designate_dns_spec.rb b/spec/classes/designate_dns_spec.rb
index 31449880..b2560d25 100644
--- a/spec/classes/designate_dns_spec.rb
+++ b/spec/classes/designate_dns_spec.rb
@@ -17,33 +17,29 @@ describe 'designate::dns' do
 
   end
 
-  context 'on Debian platforms' do
-    let :facts do
-      { :osfamily => 'Debian' }
+  on_supported_os({
+    :supported_os => OSDefaults.get_supported_os
+  }).each do |os,facts|
+    context "on #{os}" do
+      let (:facts) do
+        facts.merge!(OSDefaults.get_facts())
+      end
+
+      let(:params) do
+        case facts[:osfamily]
+        when 'Debian'
+          {
+            :designatepath => '/var/cache/bind/bind9',
+            :designatefile => '/var/cache/bind/bind9/zones.config'
+          }
+        when 'RedHat'
+          {
+            :designatepath => '/var/named/bind9',
+            :designatefile => '/var/named/bind9/zones.config'
+          }
+        end
+      end
+      it_behaves_like 'designate-dns'
     end
-
-    let :params do
-      {
-        :designatepath => '/var/cache/bind/bind9',
-        :designatefile => '/var/cache/bind/bind9/zones.config'
-      }
-    end
-
-    it_configures 'designate-dns'
-  end
-
-  context 'on RedHat platforms' do
-    let :facts do
-      { :osfamily => 'RedHat' }
-    end
-
-    let :params do
-      {
-        :designatepath => '/var/named/bind9',
-        :designatefile => '/var/named/bind9/zones.config'
-      }
-    end
-
-    it_configures 'designate-dns'
   end
 end
diff --git a/spec/classes/designate_init_spec.rb b/spec/classes/designate_init_spec.rb
index 4304a9d9..fb7f8272 100644
--- a/spec/classes/designate_init_spec.rb
+++ b/spec/classes/designate_init_spec.rb
@@ -47,6 +47,18 @@ describe 'designate' do
       it_configures 'rabbit with HA support'
     end
 
+    context 'with custom package name' do
+      let :platform_params do
+        { :common_package_name => 'designate-common-custom-name' }
+      end
+
+      before do
+        params.merge!({ :common_package_name => 'designate-common-custom-name' })
+      end
+
+      it_configures 'a designate base installation'
+    end
+
   end
 
   shared_examples_for 'a designate base installation' do
@@ -157,43 +169,23 @@ describe 'designate' do
 
   end
 
-  context 'on Debian platforms' do
-    let :facts do
-      { :osfamily => 'Debian' }
+  on_supported_os({
+    :supported_os => OSDefaults.get_supported_os
+  }).each do |os,facts|
+    context "on #{os}" do
+      let (:facts) do
+        facts.merge!(OSDefaults.get_facts())
+      end
+
+      let(:platform_params) do
+        case facts[:osfamily]
+        when 'Debian'
+          { :common_package_name => 'designate-common' }
+        when 'RedHat'
+          { :common_package_name => 'openstack-designate' }
+        end
+      end
+      it_behaves_like 'designate'
     end
-
-    let :platform_params do
-      { :common_package_name => 'designate-common' }
-    end
-
-    it_configures 'designate'
-  end
-
-  context 'on RedHat platforms' do
-    let :facts do
-      { :osfamily => 'RedHat' }
-    end
-
-    let :platform_params do
-      { :common_package_name => 'openstack-designate' }
-    end
-
-    it_configures 'designate'
-  end
-
-  context 'with custom package name' do
-    let :facts do
-      { :osfamily => 'RedHat' }
-    end
-
-    let :platform_params do
-      { :common_package_name => 'designate-common-custom-name' }
-    end
-
-    before do
-      params.merge!({ :common_package_name => 'designate-common-custom-name' })
-    end
-
-    it_configures 'designate'
   end
 end
diff --git a/spec/classes/designate_keystone_auth_spec.rb b/spec/classes/designate_keystone_auth_spec.rb
index 9a06347b..b0434823 100644
--- a/spec/classes/designate_keystone_auth_spec.rb
+++ b/spec/classes/designate_keystone_auth_spec.rb
@@ -4,107 +4,106 @@
 require 'spec_helper'
 
 describe 'designate::keystone::auth' do
+  shared_examples_for 'designate-keystone-auth' do
+    context 'with default class parameters' do
+      let :params do
+        { :password => 'desigpwd',
+          :tenant   => 'fooboozoo' }
+      end
 
-  let :facts do
-    { :osfamily => 'Debian' }
-  end
+      it { is_expected.to contain_keystone_user('designate').with(
+        :ensure   => 'present',
+        :password => 'desigpwd',
+      ) }
 
-  describe 'with default class parameters' do
-    let :params do
-      { :password => 'desigpwd',
-        :tenant   => 'fooboozoo' }
+      it { is_expected.to contain_keystone_user_role('designate@fooboozoo').with(
+        :ensure  => 'present',
+        :roles   => ['admin']
+      )}
+
+      it { is_expected.to contain_keystone_service('designate::dns').with(
+        :ensure      => 'present',
+        :description => 'Openstack DNSaas Service'
+      ) }
+
+      it { is_expected.to contain_keystone_endpoint('RegionOne/designate::dns').with(
+        :ensure       => 'present',
+        :public_url   => "http://127.0.0.1:9001/v1",
+        :admin_url    => "http://127.0.0.1:9001/v1",
+        :internal_url => "http://127.0.0.1:9001/v1"
+      ) }
     end
 
-    it { is_expected.to contain_keystone_user('designate').with(
-      :ensure   => 'present',
-      :password => 'desigpwd',
-    ) }
 
-    it { is_expected.to contain_keystone_user_role('designate@fooboozoo').with(
-      :ensure  => 'present',
-      :roles   => ['admin']
-    )}
+    context 'when overriding endpoint URLs' do
+      let :params do
+        { :password         => 'desigpwd',
+          :public_url       => 'https://10.10.10.10:81/v2',
+          :internal_url     => 'https://10.10.10.11:81/v2',
+          :admin_url        => 'https://10.10.10.12:81/v2' }
+      end
 
-    it { is_expected.to contain_keystone_service('designate::dns').with(
-      :ensure      => 'present',
-      :description => 'Openstack DNSaas Service'
-    ) }
-
-    it { is_expected.to contain_keystone_endpoint('RegionOne/designate::dns').with(
-      :ensure       => 'present',
-      :public_url   => "http://127.0.0.1:9001/v1",
-      :admin_url    => "http://127.0.0.1:9001/v1",
-      :internal_url => "http://127.0.0.1:9001/v1"
-    ) }
-  end
-
-  describe 'when configuring designate-server' do
-    let :pre_condition do
-      "class { 'designate::server': auth_password => 'test' }"
+      it { is_expected.to contain_keystone_endpoint('RegionOne/designate::dns').with(
+        :ensure       => 'present',
+        :public_url   => 'https://10.10.10.10:81/v2',
+        :internal_url => 'https://10.10.10.11:81/v2',
+        :admin_url    => 'https://10.10.10.12:81/v2'
+      ) }
     end
 
-    let :params do
-      { :password => 'desigpwd',
-        :tenant   => 'fooboozoo' }
+    context 'with deprecated endpoint parameters' do
+      let :params do
+        { :password         => 'desigpwd',
+          :public_protocol  => 'https',
+          :public_address   => '10.10.10.10',
+          :port             => '81',
+          :internal_address => '10.10.10.11',
+          :admin_address    => '10.10.10.12' }
+      end
+
+      it { is_expected.to contain_keystone_endpoint('RegionOne/designate::dns').with(
+        :ensure       => 'present',
+        :public_url   => "https://10.10.10.10:81/v1",
+        :internal_url => "http://10.10.10.11:81/v1",
+        :admin_url    => "http://10.10.10.12:81/v1"
+      ) }
+    end
+
+    context 'when overriding auth name' do
+      let :params do
+        { :password => 'foo',
+          :auth_name => 'designate1' }
+      end
+
+      it { is_expected.to contain_keystone_user('designate1') }
+      it { is_expected.to contain_keystone_user_role('designate1@services') }
+      it { is_expected.to contain_keystone_service('designate1::dns') }
+      it { is_expected.to contain_keystone_endpoint('RegionOne/designate1::dns') }
+    end
+
+    context 'when overriding service name' do
+      let :params do
+        { :service_name => 'designate_service',
+          :password => 'foo',
+          :auth_name => 'designate1' }
+      end
+
+      it { is_expected.to contain_keystone_user('designate1') }
+      it { is_expected.to contain_keystone_user_role('designate1@services') }
+      it { is_expected.to contain_keystone_service('designate_service::dns') }
+      it { is_expected.to contain_keystone_endpoint('RegionOne/designate_service::dns') }
     end
   end
 
-  describe 'when overriding endpoint URLs' do
-    let :params do
-      { :password         => 'desigpwd',
-        :public_url       => 'https://10.10.10.10:81/v2',
-        :internal_url     => 'https://10.10.10.11:81/v2',
-        :admin_url        => 'https://10.10.10.12:81/v2' }
+  on_supported_os({
+    :supported_os => OSDefaults.get_supported_os
+  }).each do |os,facts|
+    context "on #{os}" do
+      let (:facts) do
+        facts.merge!(OSDefaults.get_facts())
+      end
+
+      it_behaves_like 'designate-keystone-auth'
     end
-
-    it { is_expected.to contain_keystone_endpoint('RegionOne/designate::dns').with(
-      :ensure       => 'present',
-      :public_url   => 'https://10.10.10.10:81/v2',
-      :internal_url => 'https://10.10.10.11:81/v2',
-      :admin_url    => 'https://10.10.10.12:81/v2'
-    ) }
-  end
-
-  describe 'with deprecated endpoint parameters' do
-    let :params do
-      { :password         => 'desigpwd',
-        :public_protocol  => 'https',
-        :public_address   => '10.10.10.10',
-        :port             => '81',
-        :internal_address => '10.10.10.11',
-        :admin_address    => '10.10.10.12' }
-    end
-
-    it { is_expected.to contain_keystone_endpoint('RegionOne/designate::dns').with(
-      :ensure       => 'present',
-      :public_url   => "https://10.10.10.10:81/v1",
-      :internal_url => "http://10.10.10.11:81/v1",
-      :admin_url    => "http://10.10.10.12:81/v1"
-    ) }
-  end
-
-  describe 'when overriding auth name' do
-    let :params do
-      { :password => 'foo',
-        :auth_name => 'designate1' }
-    end
-
-    it { is_expected.to contain_keystone_user('designate1') }
-    it { is_expected.to contain_keystone_user_role('designate1@services') }
-    it { is_expected.to contain_keystone_service('designate1::dns') }
-    it { is_expected.to contain_keystone_endpoint('RegionOne/designate1::dns') }
-  end
-
-  describe 'when overriding service name' do
-    let :params do
-      { :service_name => 'designate_service',
-        :password => 'foo',
-        :auth_name => 'designate1' }
-    end
-
-    it { is_expected.to contain_keystone_user('designate1') }
-    it { is_expected.to contain_keystone_user_role('designate1@services') }
-    it { is_expected.to contain_keystone_service('designate_service::dns') }
-    it { is_expected.to contain_keystone_endpoint('RegionOne/designate_service::dns') }
   end
 end
diff --git a/spec/classes/designate_logging_spec.rb b/spec/classes/designate_logging_spec.rb
index b918649b..65cc1c6b 100644
--- a/spec/classes/designate_logging_spec.rb
+++ b/spec/classes/designate_logging_spec.rb
@@ -123,20 +123,16 @@ describe 'designate::logging' do
       }
   end
 
-  context 'on Debian platforms' do
-    let :facts do
-      { :osfamily => 'Debian' }
+  on_supported_os({
+    :supported_os => OSDefaults.get_supported_os
+  }).each do |os,facts|
+    context "on #{os}" do
+      let (:facts) do
+        facts.merge!(OSDefaults.get_facts())
+      end
+
+      it_behaves_like 'designate-logging'
     end
-
-    it_configures 'designate-logging'
-  end
-
-  context 'on RedHat platforms' do
-    let :facts do
-      { :osfamily => 'RedHat' }
-    end
-
-    it_configures 'designate-logging'
   end
 
 end
diff --git a/spec/classes/designate_policy_spec.rb b/spec/classes/designate_policy_spec.rb
index 1762c79e..001967e7 100644
--- a/spec/classes/designate_policy_spec.rb
+++ b/spec/classes/designate_policy_spec.rb
@@ -23,19 +23,16 @@ describe 'designate::policy' do
     end
   end
 
-  context 'on Debian platforms' do
-    let :facts do
-      { :osfamily => 'Debian' }
-    end
+  on_supported_os({
+    :supported_os => OSDefaults.get_supported_os
+  }).each do |os,facts|
+    context "on #{os}" do
+      let (:facts) do
+        facts.merge!(OSDefaults.get_facts())
+      end
 
-    it_configures 'designate policies'
+      it_behaves_like 'designate policies'
+    end
   end
 
-  context 'on RedHat platforms' do
-    let :facts do
-      { :osfamily => 'RedHat' }
-    end
-
-    it_configures 'designate policies'
-  end
 end
diff --git a/spec/classes/designate_sink_spec.rb b/spec/classes/designate_sink_spec.rb
index ded5ea10..89547e9f 100644
--- a/spec/classes/designate_sink_spec.rb
+++ b/spec/classes/designate_sink_spec.rb
@@ -34,53 +34,46 @@ describe 'designate::sink' do
         end
       end
     end
+
+    context 'with custom package name' do
+      before :each do
+        params.merge!({ :sink_package_name => 'designate-sink-custom-name' })
+      end
+
+      it 'configures using custom name' do
+        is_expected.to contain_package('designate-sink').with(
+          :name      => 'designate-sink-custom-name',
+          :ensure    => 'present',
+          :tag       => ['openstack', 'designate-package'],
+        )
+      end
+    end
   end
 
-  context 'on Debian platforms' do
-    let :facts do
-      { :osfamily => 'Debian' }
-    end
+  on_supported_os({
+    :supported_os => OSDefaults.get_supported_os
+  }).each do |os,facts|
+    context "on #{os}" do
+      let (:facts) do
+        facts.merge!(OSDefaults.get_facts())
+      end
 
-    let :platform_params do
-      {
-        :sink_package_name => 'designate-sink',
-        :sink_service_name => 'designate-sink'
-      }
+      let(:platform_params) do
+        case facts[:osfamily]
+        when 'Debian'
+          {
+            :sink_package_name => 'designate-sink',
+            :sink_service_name => 'designate-sink'
+          }
+        when 'RedHat'
+          {
+            :sink_package_name => 'openstack-designate-sink',
+            :sink_service_name => 'openstack-designate-sink'
+          }
+        end
+      end
+      it_behaves_like 'designate-sink'
     end
-
-    it_configures 'designate-sink'
   end
 
-  context 'on RedHat platforms' do
-    let :facts do
-      { :osfamily => 'RedHat' }
-    end
-
-    let :platform_params do
-      {
-        :sink_package_name => 'openstack-designate-sink',
-        :sink_service_name => 'openstack-designate-sink'
-      }
-    end
-
-    it_configures 'designate-sink'
-  end
-
-   context 'with custom package name' do
-    let :facts do
-      { :osfamily => 'RedHat' }
-    end
-
-    let :platform_params do
-      { :sink_package_name => 'designate-sink-custom-name',
-        :sink_service_name => 'openstack-designate-sink'
-      }
-    end
-
-    before do
-      params.merge!({ :sink_package_name => 'designate-sink-custom-name' })
-    end
-
-    it_configures 'designate-sink'
-  end
 end