diff --git a/test/io/wait/test_io_wait_uncommon.rb b/test/io/wait/test_io_wait_uncommon.rb
index 75cd335..7b92e4c 100644
--- a/test/io/wait/test_io_wait_uncommon.rb
+++ b/test/io/wait/test_io_wait_uncommon.rb
@@ -13,7 +13,7 @@ def test_tty_wait
   end
 
   def test_fifo_wait
-    skip 'no mkfifo' unless File.respond_to?(:mkfifo) && IO.const_defined?(:NONBLOCK)
+    omit 'no mkfifo' unless File.respond_to?(:mkfifo) && IO.const_defined?(:NONBLOCK)
     require 'tmpdir'
     Dir.mktmpdir('rubytest-fifo') do |dir|
       fifo = "#{dir}/fifo"
diff --git a/test/lib/helper.rb b/test/lib/helper.rb
index 31bd5c3..909f8f9 100644
--- a/test/lib/helper.rb
+++ b/test/lib/helper.rb
@@ -1,8 +1,4 @@
 require "test/unit"
 require_relative "core_assertions"
 
-class Test::Unit::TestCase
-  alias skip pend
-end
-
 Test::Unit::TestCase.include Test::Unit::CoreAssertions