diff --git a/Gemfile b/Gemfile
index 34efd14..164278d 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,2 +1,3 @@
 source "http://rubygems.org"
-gemspec
\ No newline at end of file
+gemspec
+gem 'simplecov', :require => false, :group => :test
diff --git a/Rakefile b/Rakefile
index b65d511..0afd6a4 100644
--- a/Rakefile
+++ b/Rakefile
@@ -1,3 +1,8 @@
+require 'simplecov'
+SimpleCov.start do
+  add_filter '/test/'
+end
+
 require 'bundler'
 Bundler::GemHelper.install_tasks