diff --git a/test/ruby/test_process.rb b/test/ruby/test_process.rb
index ed72279689516f..6ca16733bbf014 100644
--- a/test/ruby/test_process.rb
+++ b/test/ruby/test_process.rb
@@ -4,7 +4,6 @@
 require 'tempfile'
 require 'timeout'
 require 'rbconfig'
-require 'objspace'
 
 class TestProcess < Test::Unit::TestCase
   RUBY = EnvUtil.rubybin