diff --git a/test/test_rake_thread_pool.rb b/test/test_rake_thread_pool.rb
index 421c38d90..35a1fe9d1 100644
--- a/test/test_rake_thread_pool.rb
+++ b/test/test_rake_thread_pool.rb
@@ -1,6 +1,5 @@
 require File.expand_path('../helper', __FILE__)
 require 'rake/thread_pool'
-require 'test/unit/assertions'
 
 class TestRakeTestThreadPool < Rake::TestCase
   include Rake