It should be require_relative.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@33992 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/ruby/test_econv.rb

@@ -1,5 +1,5 @@
 require 'test/unit'
-require 'envutil'
+require_relative 'envutil'
 
 class TestEncodingConverter < Test::Unit::TestCase
   def check_ec(edst, esrc, eres, dst, src, ec, off, len, opts=nil)