diff --git a/activeresource/test/setter_trap.rb b/activeresource/test/setter_trap.rb
index 437fbdad32..7cfd9ca111 100644
--- a/activeresource/test/setter_trap.rb
+++ b/activeresource/test/setter_trap.rb
@@ -1,5 +1,3 @@
-require 'abstract_unit'
-
 class SetterTrap < ActiveSupport::BasicObject
   class << self
     def rollback_sets(obj)