diff --git a/Gemfile b/Gemfile
index 2df03ec..58723d2 100644
--- a/Gemfile
+++ b/Gemfile
@@ -4,4 +4,5 @@
 
 gem 'rake'
 gem 'puppet-lint'
+gem 'rspec-puppet'
 gem 'puppet', puppetversion
diff --git a/Rakefile b/Rakefile
index bdb32be..733330f 100644
--- a/Rakefile
+++ b/Rakefile
@@ -1,12 +1,17 @@
 require 'rake'
 
 begin
+  require 'rspec/core/rake_task'
   require 'puppet-lint/tasks/puppet-lint'
 rescue LoadError
   require 'rubygems'
   retry
 end
 
-task :test => [:lint]
+RSpec::Core::RakeTask.new(:spec) do |t|
+  t.pattern = 'spec/*/*_spec.rb'
+end
+
+task :test => [:spec, :lint]
 
 task :default => :test
diff --git a/spec/defines/iface_spec.rb b/spec/defines/iface_spec.rb
new file mode 100644
index 0000000..a443385
--- /dev/null
+++ b/spec/defines/iface_spec.rb
@@ -0,0 +1,12 @@
+require 'spec_helper'
+
+describe 'interfaces::iface' do
+  let(:title) { 'lo' }
+  let(:params) { { :family => 'inet', :method => 'loopback', :auto => 1 } }
+
+  it {
+    should contain_interfaces__auto('lo')
+    should contain_concat__fragment('interfaces::iface_lo').with_target('/etc/network/interfaces')
+    should contain_concat__fragment('interfaces::iface_lo').with_content('iface lo inet loopback\n\t\n\n')
+  }
+end
diff --git a/spec/fixtures/manifests/site.pp b/spec/fixtures/manifests/site.pp
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/spec/fixtures/manifests/site.pp
diff --git a/spec/fixtures/modules/interfaces/manifests b/spec/fixtures/modules/interfaces/manifests
new file mode 120000
index 0000000..373b992
--- /dev/null
+++ b/spec/fixtures/modules/interfaces/manifests
@@ -0,0 +1 @@
+../../../../manifests
\ No newline at end of file
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
new file mode 100644
index 0000000..8c3a6cb
--- /dev/null
+++ b/spec/spec_helper.rb
@@ -0,0 +1,6 @@
+require 'rspec-puppet'
+
+RSpec.configure do |c|
+  c.module_path = File.expand_path(File.join(__FILE__, '..', 'fixtures', 'modules'))
+  c.manifest_dir = File.expand_path(File.join(__FILE__, '..', 'fixtures', 'manifests'))
+end