diff --git a/Gemfile b/Gemfile
index a2381c95a..7ff0da1e8 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,6 +1,7 @@
 source :rubygems
 
 group :test do
+  gem 'rake'
   gem 'purdytest'
   gem 'mocha'
 end
diff --git a/Gemfile.lock b/Gemfile.lock
index 429015789..1a45d8e60 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -7,6 +7,7 @@ GEM
       metaclass (~> 0.0.1)
     purdytest (1.0.0)
       minitest (~> 2.2)
+    rake (10.0.1)
 
 PLATFORMS
   ruby
@@ -14,3 +15,4 @@ PLATFORMS
 DEPENDENCIES
   mocha
   purdytest
+  rake