diff --git a/test/test_objectid.rb b/test/test_objectid.rb
index 107930b..9a0f46d 100644
--- a/test/test_objectid.rb
+++ b/test/test_objectid.rb
@@ -1,4 +1,4 @@
-require 'test_helper'
+require 'test/test_helper'
 
 class ObjectIDTest < Test::Unit::TestCase