diff --git a/spec/classes/hitch_spec.rb b/spec/classes/hitch_spec.rb
index 7aa5fa8..8cc095b 100644
--- a/spec/classes/hitch_spec.rb
+++ b/spec/classes/hitch_spec.rb
@@ -1,11 +1,28 @@
 require 'spec_helper'
 
 describe 'hitch' do
   on_supported_os.each do |os, os_facts|
     context "on #{os}" do
       let(:facts) { os_facts }
 
-      it { is_expected.to compile }
+      context 'defaults' do
+        it { is_expected.to compile }
+        it { is_expected.to contain_exec('hitch::config generate dhparams') }
+        it {
+          is_expected.to contain_file('/etc/hitch/dhparams.pem')
+            .without_content
+        }
+      end
+
+      context 'with dhparams_content' do
+        let(:params) { { dhparams_content: 'BEGIN DH PARAMETERS' } }
+
+        it { is_expected.not_to contain_exec('hitch::config generate dhparams') }
+        it {
+          is_expected.to contain_file('/etc/hitch/dhparams.pem')
+            .with_content(%r{BEGIN DH PARAMETERS})
+        }
+      end
     end
   end
 end