diff --git a/test/test_ronn.rb b/test/test_ronn.rb
index 066ed8e..d05c136 100644
--- a/test/test_ronn.rb
+++ b/test/test_ronn.rb
@@ -1,3 +1,4 @@
+require 'fileutils'
 require 'contest'
 
 class RonnTest < Test::Unit::TestCase