diff --git a/test/helper.rb b/test/helper.rb
index 250ba8b..e72e291 100644
--- a/test/helper.rb
+++ b/test/helper.rb
@@ -1,5 +1,6 @@
 require 'test/unit'
 require 'shoulda'
+require 'rack/builder'
 require 'rack/mock'
 require 'rack/test'