diff --git a/ChangeLog b/ChangeLog
index 673fc91ae1..7de654666e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,15 @@
+Fri Nov 14 01:03:17 2014  Tanaka Akira  <akr@fsij.org>
+
+	* test/lib/envutil.rb: Moved from test/ruby/.
+
+	* test/lib/find_executable.rb: Ditto.
+
+	* test/lib/memory_status.rb: Ditto.
+
+	* test/lib/test/unit.rb: require envutil.
+
+	* test/: Don't require envutil in test files.
+
 Thu Nov 13 21:59:58 2014  CHIKANAGA Tomoyuki  <nagachika@ruby-lang.org>
 
 	* lib/rexml/document.rb: add REXML::Document#document.
diff --git a/test/-ext-/bug_reporter/test_bug_reporter.rb b/test/-ext-/bug_reporter/test_bug_reporter.rb
index f36f7a08ff..6ac5b8f995 100644
--- a/test/-ext-/bug_reporter/test_bug_reporter.rb
+++ b/test/-ext-/bug_reporter/test_bug_reporter.rb
@@ -1,6 +1,5 @@
 require 'test/unit'
 require 'tmpdir'
-require_relative "../../ruby/envutil"
 
 class TestBugReporter < Test::Unit::TestCase
   def test_bug_reporter_add
diff --git a/test/-ext-/exception/test_data_error.rb b/test/-ext-/exception/test_data_error.rb
index 140de5bd5a..53cbb28438 100644
--- a/test/-ext-/exception/test_data_error.rb
+++ b/test/-ext-/exception/test_data_error.rb
@@ -1,5 +1,4 @@
 require 'test/unit'
-require_relative '../../ruby/envutil'
 
 module Bug
   class TestException < Test::Unit::TestCase
diff --git a/test/-ext-/exception/test_ensured.rb b/test/-ext-/exception/test_ensured.rb
index 103250c678..97d9794186 100644
--- a/test/-ext-/exception/test_ensured.rb
+++ b/test/-ext-/exception/test_ensured.rb
@@ -1,5 +1,4 @@
 require 'test/unit'
-require_relative '../../ruby/envutil'
 
 module Bug
   class Bug7802 < RuntimeError
diff --git a/test/-ext-/marshal/test_usrmarshal.rb b/test/-ext-/marshal/test_usrmarshal.rb
index ae23223e15..8d8db012ac 100644
--- a/test/-ext-/marshal/test_usrmarshal.rb
+++ b/test/-ext-/marshal/test_usrmarshal.rb
@@ -1,5 +1,4 @@
 require 'test/unit'
-require_relative '../../ruby/envutil'
 require '-test-/marshal/usr'
 
 module Bug end
diff --git a/test/-ext-/string/test_modify_expand.rb b/test/-ext-/string/test_modify_expand.rb
index 1d20db4e6c..34b7be7bba 100644
--- a/test/-ext-/string/test_modify_expand.rb
+++ b/test/-ext-/string/test_modify_expand.rb
@@ -1,6 +1,5 @@
 require 'test/unit'
 require "-test-/string/string"
-require_relative '../../ruby/envutil'
 
 class Test_StringModifyExpand < Test::Unit::TestCase
   def test_modify_expand_memory_leak
diff --git a/test/-ext-/struct/test_member.rb b/test/-ext-/struct/test_member.rb
index 4e6295c218..18e98085a0 100644
--- a/test/-ext-/struct/test_member.rb
+++ b/test/-ext-/struct/test_member.rb
@@ -1,6 +1,5 @@
 require 'test/unit'
 require "-test-/struct"
-require_relative '../../ruby/envutil'
 
 class  Bug::Struct::Test_Member < Test::Unit::TestCase
   S = Bug::Struct.new(:a)
diff --git a/test/-ext-/test_bug-3571.rb b/test/-ext-/test_bug-3571.rb
index cd43d0330d..d7c26d1ff0 100644
--- a/test/-ext-/test_bug-3571.rb
+++ b/test/-ext-/test_bug-3571.rb
@@ -1,5 +1,4 @@
 require 'test/unit'
-require_relative '../ruby/envutil'
 
 class Test_BUG_3571 < Test::Unit::TestCase
   def test_block_call_id
diff --git a/test/-ext-/test_recursion.rb b/test/-ext-/test_recursion.rb
index 43a256f942..06faf6dc7a 100644
--- a/test/-ext-/test_recursion.rb
+++ b/test/-ext-/test_recursion.rb
@@ -1,6 +1,5 @@
 # -*- coding: us-ascii -*-
 require 'test/unit'
-require_relative '../ruby/envutil'
 
 class TestRecursion < Test::Unit::TestCase
   require '-test-/recursion'
diff --git a/test/-ext-/tracepoint/test_tracepoint.rb b/test/-ext-/tracepoint/test_tracepoint.rb
index cc630e895b..b5a6e769d6 100644
--- a/test/-ext-/tracepoint/test_tracepoint.rb
+++ b/test/-ext-/tracepoint/test_tracepoint.rb
@@ -1,6 +1,5 @@
 require 'test/unit'
 require '-test-/tracepoint'
-require_relative '../../ruby/envutil'
 
 class TestTracepointObj < Test::Unit::TestCase
   def test_not_available_from_ruby
diff --git a/test/-ext-/win32/test_dln.rb b/test/-ext-/win32/test_dln.rb
index c9065e66fb..2801ebe3c9 100644
--- a/test/-ext-/win32/test_dln.rb
+++ b/test/-ext-/win32/test_dln.rb
@@ -1,7 +1,6 @@
 require 'test/unit'
 require 'tmpdir'
 require 'rbconfig'
-require_relative '../../ruby/envutil'
 
 module Bug
   module Win32
diff --git a/test/-ext-/win32/test_fd_setsize.rb b/test/-ext-/win32/test_fd_setsize.rb
index 0881971969..6fe889c941 100644
--- a/test/-ext-/win32/test_fd_setsize.rb
+++ b/test/-ext-/win32/test_fd_setsize.rb
@@ -1,5 +1,4 @@
 require 'test/unit'
-require_relative '../../ruby/envutil'
 
 module Bug
   module Win32
diff --git a/test/bigdecimal/test_bigdecimal.rb b/test/bigdecimal/test_bigdecimal.rb
index 23c540b338..042d11da0f 100644
--- a/test/bigdecimal/test_bigdecimal.rb
+++ b/test/bigdecimal/test_bigdecimal.rb
@@ -1,5 +1,4 @@
 require_relative "testbase"
-require_relative "../ruby/envutil"
 require 'bigdecimal/math'
 
 require 'thread'
diff --git a/test/bigdecimal/test_bigmath.rb b/test/bigdecimal/test_bigmath.rb
index 88c2e2e120..740c755eae 100644
--- a/test/bigdecimal/test_bigmath.rb
+++ b/test/bigdecimal/test_bigmath.rb
@@ -1,5 +1,4 @@
 require_relative "testbase"
-require_relative "../ruby/envutil"
 require "bigdecimal/math"
 
 class TestBigMath < Test::Unit::TestCase
diff --git a/test/cgi/test_cgi_multipart.rb b/test/cgi/test_cgi_multipart.rb
index 806adbd013..1325798e95 100644
--- a/test/cgi/test_cgi_multipart.rb
+++ b/test/cgi/test_cgi_multipart.rb
@@ -2,7 +2,6 @@ require 'test/unit'
 require 'cgi'
 require 'tempfile'
 require 'stringio'
-require_relative '../ruby/envutil'
 
 
 ##
diff --git a/test/drb/drbtest.rb b/test/drb/drbtest.rb
index da44a96baa..aac705c831 100644
--- a/test/drb/drbtest.rb
+++ b/test/drb/drbtest.rb
@@ -3,7 +3,6 @@ require 'drb/drb'
 require 'drb/extservm'
 require 'timeout'
 require 'shellwords'
-require_relative '../ruby/envutil'
 
 module DRbTests
 
diff --git a/test/dtrace/helper.rb b/test/dtrace/helper.rb
index 318857c8dd..ccc708147d 100644
--- a/test/dtrace/helper.rb
+++ b/test/dtrace/helper.rb
@@ -1,7 +1,6 @@
 # -*- coding: us-ascii -*-
 require 'test/unit'
 require 'tempfile'
-require_relative '../ruby/envutil'
 
 if Process.euid == 0
   ok = true
diff --git a/test/fiddle/helper.rb b/test/fiddle/helper.rb
index f58077e7bc..bc98f858ba 100644
--- a/test/fiddle/helper.rb
+++ b/test/fiddle/helper.rb
@@ -2,7 +2,6 @@ require 'minitest/autorun'
 require 'fiddle'
 
 # FIXME: this is stolen from DL and needs to be refactored.
-require_relative '../ruby/envutil'
 
 libc_so = libm_so = nil
 
diff --git a/test/fiddle/test_function.rb b/test/fiddle/test_function.rb
index 63dfbd6e5d..de7c9585f7 100644
--- a/test/fiddle/test_function.rb
+++ b/test/fiddle/test_function.rb
@@ -1,6 +1,5 @@
 begin
   require_relative 'helper'
-  require_relative '../ruby/envutil'
 rescue LoadError
 end
 
diff --git a/test/fiddle/test_handle.rb b/test/fiddle/test_handle.rb
index cde3fa816d..ffbde41626 100644
--- a/test/fiddle/test_handle.rb
+++ b/test/fiddle/test_handle.rb
@@ -1,6 +1,5 @@
 begin
   require_relative 'helper'
-  require_relative '../ruby/envutil'
 rescue LoadError
 end
 
diff --git a/test/fiddle/test_pointer.rb b/test/fiddle/test_pointer.rb
index 2ba11b4ed7..3ea9bc86dd 100644
--- a/test/fiddle/test_pointer.rb
+++ b/test/fiddle/test_pointer.rb
@@ -1,6 +1,5 @@
 begin
   require_relative 'helper'
-  require_relative '../ruby/envutil'
 rescue LoadError
 end
 
diff --git a/test/fileutils/test_fileutils.rb b/test/fileutils/test_fileutils.rb
index 5a9c1b1243..fe9a1b327d 100644
--- a/test/fileutils/test_fileutils.rb
+++ b/test/fileutils/test_fileutils.rb
@@ -6,7 +6,6 @@ require_relative 'fileasserts'
 require 'pathname'
 require 'tmpdir'
 require 'test/unit'
-require_relative '../ruby/envutil'
 
 class TestFileUtils < Test::Unit::TestCase
   TMPROOT = "#{Dir.tmpdir}/fileutils.rb.#{$$}"
diff --git a/test/gdbm/test_gdbm.rb b/test/gdbm/test_gdbm.rb
index b707118162..07a1bb3386 100644
--- a/test/gdbm/test_gdbm.rb
+++ b/test/gdbm/test_gdbm.rb
@@ -7,7 +7,6 @@ if defined? GDBM
   require 'test/unit'
   require 'tmpdir'
   require 'fileutils'
-  require_relative '../ruby/envutil'
 
   class TestGDBM_RDONLY < Test::Unit::TestCase
     def TestGDBM_RDONLY.uname_s
diff --git a/test/io/console/test_io_console.rb b/test/io/console/test_io_console.rb
index 9cddd991a6..8b4fca5064 100644
--- a/test/io/console/test_io_console.rb
+++ b/test/io/console/test_io_console.rb
@@ -4,7 +4,6 @@ begin
   require 'pty'
 rescue LoadError
 end
-require_relative '../../ruby/envutil'
 
 class TestIO_Console < Test::Unit::TestCase
   Bug6116 = '[ruby-dev:45309]'
diff --git a/test/irb/test_completion.rb b/test/irb/test_completion.rb
index e8baa0d8f5..eeeda1234c 100644
--- a/test/irb/test_completion.rb
+++ b/test/irb/test_completion.rb
@@ -1,5 +1,4 @@
 require 'test/unit'
-require_relative '../ruby/envutil'
 
 module TestIRB
   class TestCompletion < Test::Unit::TestCase
diff --git a/test/irb/test_option.rb b/test/irb/test_option.rb
index 5e29803bb6..a7dd663112 100644
--- a/test/irb/test_option.rb
+++ b/test/irb/test_option.rb
@@ -1,5 +1,4 @@
 require 'test/unit'
-require_relative '../ruby/envutil'
 
 module TestIRB
   class TestOption < Test::Unit::TestCase
diff --git a/test/irb/test_raise_no_backtrace_exception.rb b/test/irb/test_raise_no_backtrace_exception.rb
index e8204d7a1b..67fb5b66cc 100644
--- a/test/irb/test_raise_no_backtrace_exception.rb
+++ b/test/irb/test_raise_no_backtrace_exception.rb
@@ -1,5 +1,4 @@
 require 'test/unit'
-require_relative '../ruby/envutil'
 
 module TestIRB
   class TestRaiseNoBacktraceException < Test::Unit::TestCase
diff --git a/test/json/test_json_generate.rb b/test/json/test_json_generate.rb
index 618b933bac..2d4e1eea52 100755
--- a/test/json/test_json_generate.rb
+++ b/test/json/test_json_generate.rb
@@ -215,7 +215,6 @@ EOT
   end
 
   def test_gc
-    require_relative '../ruby/envutil.rb'
     assert_in_out_err(%w[-rjson --disable-gems], <<-EOS, [], [])
       bignum_too_long_to_embed_as_string = 1234567890123456789012345
       expect = bignum_too_long_to_embed_as_string.to_s
diff --git a/test/ruby/envutil.rb b/test/lib/envutil.rb
similarity index 99%
rename from test/ruby/envutil.rb
rename to test/lib/envutil.rb
index 6b6d91833f..001753a9f0 100644
--- a/test/ruby/envutil.rb
+++ b/test/lib/envutil.rb
@@ -1,7 +1,6 @@
 # -*- coding: us-ascii -*-
 require "open3"
 require "timeout"
-require "test/unit"
 require_relative "find_executable"
 
 module EnvUtil
@@ -357,7 +356,7 @@ module Test
         line -= 5 # lines until src
         src = <<eom
 # -*- coding: #{src.encoding}; -*-
-  require #{__dir__.dump}'/envutil';include Test::Unit::Assertions
+  require #{__dir__.dump}'/test/unit';include Test::Unit::Assertions
   END {
     puts [Marshal.dump($!)].pack('m'), "assertions=\#{self._assertions}"
   }
diff --git a/test/ruby/find_executable.rb b/test/lib/find_executable.rb
similarity index 100%
rename from test/ruby/find_executable.rb
rename to test/lib/find_executable.rb
diff --git a/test/ruby/memory_status.rb b/test/lib/memory_status.rb
similarity index 98%
rename from test/ruby/memory_status.rb
rename to test/lib/memory_status.rb
index 6c6b3f8934..071c5f67c4 100644
--- a/test/ruby/memory_status.rb
+++ b/test/lib/memory_status.rb
@@ -60,7 +60,7 @@ module Memory
     end
   else
     PAT = /^\s*(\d+)\s+(\d+)$/
-    require_relative 'find_executable'
+    require_relative '../lib/find_executable'
     if PSCMD = EnvUtil.find_executable("ps", "-ovsz=", "-orss=", "-p", $$.to_s) {|out| PAT =~ out}
       PSCMD.pop
     end
diff --git a/test/lib/test/unit.rb b/test/lib/test/unit.rb
index c4fdf6713f..cfafbba357 100644
--- a/test/lib/test/unit.rb
+++ b/test/lib/test/unit.rb
@@ -4,6 +4,7 @@ rescue Gem::LoadError
 end
 require 'minitest/unit'
 require 'test/unit/assertions'
+require_relative '../envutil'
 require 'test/unit/testcase'
 require 'optparse'
 
diff --git a/test/logger/test_logdevice.rb b/test/logger/test_logdevice.rb
index 78eb12e3c9..a563635d14 100644
--- a/test/logger/test_logdevice.rb
+++ b/test/logger/test_logdevice.rb
@@ -3,7 +3,6 @@ require 'test/unit'
 require 'logger'
 require 'tempfile'
 require 'tmpdir'
-require_relative '../ruby/envutil'
 
 class TestLogDevice < Test::Unit::TestCase
   class LogExcnRaiser
diff --git a/test/mkmf/test_config.rb b/test/mkmf/test_config.rb
index 4a9be57e0a..7bf537e693 100644
--- a/test/mkmf/test_config.rb
+++ b/test/mkmf/test_config.rb
@@ -2,7 +2,6 @@ $extmk = true
 
 require 'test/unit'
 require 'mkmf'
-require_relative '../ruby/envutil'
 
 class TestMkmf < Test::Unit::TestCase
   class TestConfig < Test::Unit::TestCase
diff --git a/test/net/http/test_http.rb b/test/net/http/test_http.rb
index 90336b21ce..2cd883da79 100644
--- a/test/net/http/test_http.rb
+++ b/test/net/http/test_http.rb
@@ -3,7 +3,6 @@ require 'test/unit'
 require 'net/http'
 require 'stringio'
 require_relative 'utils'
-require_relative '../../ruby/envutil'
 
 class TestNetHTTP < Test::Unit::TestCase
 
diff --git a/test/objspace/test_objspace.rb b/test/objspace/test_objspace.rb
index 8a5ed3400f..f507562b80 100644
--- a/test/objspace/test_objspace.rb
+++ b/test/objspace/test_objspace.rb
@@ -1,6 +1,5 @@
 require "test/unit"
 require "objspace"
-require_relative "../ruby/envutil"
 
 class TestObjSpace < Test::Unit::TestCase
   def test_memsize_of
diff --git a/test/openssl/test_x509store.rb b/test/openssl/test_x509store.rb
index 082e405371..439c9de26e 100644
--- a/test/openssl/test_x509store.rb
+++ b/test/openssl/test_x509store.rb
@@ -1,4 +1,3 @@
-require_relative "../ruby/envutil"
 require_relative "utils"
 
 if defined?(OpenSSL)
diff --git a/test/openssl/utils.rb b/test/openssl/utils.rb
index 7d9f133464..84cd48dbc1 100644
--- a/test/openssl/utils.rb
+++ b/test/openssl/utils.rb
@@ -12,7 +12,6 @@ require "digest/md5"
 require 'tempfile'
 require "rbconfig"
 require "socket"
-require_relative '../ruby/envutil'
 
 module OpenSSL::TestUtils
   TEST_KEY_RSA1024 = OpenSSL::PKey::RSA.new <<-_end_of_pem_
diff --git a/test/pathname/test_pathname.rb b/test/pathname/test_pathname.rb
index f77552cc9a..046f3f034f 100644
--- a/test/pathname/test_pathname.rb
+++ b/test/pathname/test_pathname.rb
@@ -5,7 +5,6 @@ require 'fileutils'
 require 'tmpdir'
 require 'enumerator'
 
-require_relative '../ruby/envutil'
 
 class TestPathname < Test::Unit::TestCase
   def self.define_assertion(name, linenum, &block)
diff --git a/test/rake/helper.rb b/test/rake/helper.rb
index 992c6bffae..526eb306fe 100644
--- a/test/rake/helper.rb
+++ b/test/rake/helper.rb
@@ -13,7 +13,6 @@ require File.expand_path('../file_creation', __FILE__)
 
 
 begin
-  require_relative '../ruby/envutil'
   require_relative 'support/ruby_runner'
   require_relative 'support/rakefile_definitions'
 rescue NoMethodError, LoadError
diff --git a/test/readline/test_readline.rb b/test/readline/test_readline.rb
index ed71e00285..3a5f972fcd 100644
--- a/test/readline/test_readline.rb
+++ b/test/readline/test_readline.rb
@@ -509,7 +509,6 @@ class TestReadline < Test::Unit::TestCase
   def assert_under_utf8
     return false if ENV['LC_ALL'] == 'UTF-8'
     loc = caller_locations(1, 1)[0].base_label.to_s
-    require_relative "../ruby/envutil"
     assert_separately([{"LC_ALL"=>"UTF-8"}, "-r", __FILE__], <<SRC)
 #skip "test \#{ENV['LC_ALL']}"
 #{self.class.name}.new(#{loc.dump}).run(Test::Unit::Runner.new)
diff --git a/test/rinda/test_rinda.rb b/test/rinda/test_rinda.rb
index 3f7dc96a1b..812b437ead 100644
--- a/test/rinda/test_rinda.rb
+++ b/test/rinda/test_rinda.rb
@@ -488,7 +488,6 @@ class TupleSpaceProxyTest < Test::Unit::TestCase
   end
 
   def test_take_bug_8215
-    require_relative '../ruby/envutil'
     service = DRb.start_service(nil, @ts_base)
 
     uri = service.uri
diff --git a/test/ripper/test_files.rb b/test/ripper/test_files.rb
index a00359360e..ca26e35bfc 100644
--- a/test/ripper/test_files.rb
+++ b/test/ripper/test_files.rb
@@ -1,11 +1,10 @@
 require 'test/unit'
-require_relative '../ruby/envutil'
 
 module TestRipper; end
 class TestRipper::Generic < Test::Unit::TestCase
   def test_parse_files
     srcdir = File.expand_path("../../..", __FILE__)
-    assert_separately(%W[--disable-gem -rripper -r#{__dir__}/../ruby/envutil - #{srcdir}],
+    assert_separately(%W[--disable-gem -rripper - #{srcdir}],
                       __FILE__, __LINE__, <<-'eom', timeout: Float::INFINITY)
       TEST_RATIO = 0.05 # testing all files needs too long time...
       class Parser < Ripper
diff --git a/test/ripper/test_parser_events.rb b/test/ripper/test_parser_events.rb
index ed026785db..cab91b9fac 100644
--- a/test/ripper/test_parser_events.rb
+++ b/test/ripper/test_parser_events.rb
@@ -1,6 +1,5 @@
 begin
   require_relative 'dummyparser'
-  require_relative '../ruby/envutil'
   require 'test/unit'
   ripper_test = true
   module TestRipper; end
diff --git a/test/ruby/test_alias.rb b/test/ruby/test_alias.rb
index dec61f6d63..8901fc243c 100644
--- a/test/ruby/test_alias.rb
+++ b/test/ruby/test_alias.rb
@@ -1,5 +1,4 @@
 require 'test/unit'
-require_relative 'envutil'
 
 class TestAlias < Test::Unit::TestCase
   class Alias0
diff --git a/test/ruby/test_argf.rb b/test/ruby/test_argf.rb
index 95d694116f..6975b83a28 100644
--- a/test/ruby/test_argf.rb
+++ b/test/ruby/test_argf.rb
@@ -3,7 +3,6 @@ require 'timeout'
 require 'tmpdir'
 require 'tempfile'
 require 'fileutils'
-require_relative 'envutil'
 
 class TestArgf < Test::Unit::TestCase
   def setup
diff --git a/test/ruby/test_array.rb b/test/ruby/test_array.rb
index d728bb78f0..4116736fcf 100644
--- a/test/ruby/test_array.rb
+++ b/test/ruby/test_array.rb
@@ -1,6 +1,5 @@
 # coding: US-ASCII
 require 'test/unit'
-require_relative 'envutil'
 
 class TestArray < Test::Unit::TestCase
   def setup
diff --git a/test/ruby/test_autoload.rb b/test/ruby/test_autoload.rb
index 0dbf613fea..b2b969a749 100644
--- a/test/ruby/test_autoload.rb
+++ b/test/ruby/test_autoload.rb
@@ -1,7 +1,6 @@
 require 'test/unit'
 require 'tempfile'
 require 'thread'
-require_relative 'envutil'
 
 class TestAutoload < Test::Unit::TestCase
   def test_autoload_so
diff --git a/test/ruby/test_beginendblock.rb b/test/ruby/test_beginendblock.rb
index d15f21060d..9c9d6b5e61 100644
--- a/test/ruby/test_beginendblock.rb
+++ b/test/ruby/test_beginendblock.rb
@@ -1,7 +1,6 @@
 require 'test/unit'
 require 'tempfile'
 require 'timeout'
-require_relative 'envutil'
 
 class TestBeginEndBlock < Test::Unit::TestCase
   DIR = File.dirname(File.expand_path(__FILE__))
diff --git a/test/ruby/test_case.rb b/test/ruby/test_case.rb
index f17f9aad9b..f20d1dfd7e 100644
--- a/test/ruby/test_case.rb
+++ b/test/ruby/test_case.rb
@@ -1,5 +1,4 @@
 require 'test/unit'
-require_relative 'envutil.rb'
 
 class TestCase < Test::Unit::TestCase
   def test_case
diff --git a/test/ruby/test_class.rb b/test/ruby/test_class.rb
index 293524b079..e17f56f913 100644
--- a/test/ruby/test_class.rb
+++ b/test/ruby/test_class.rb
@@ -1,5 +1,4 @@
 require 'test/unit'
-require_relative 'envutil'
 
 class TestClass < Test::Unit::TestCase
   # ------------------
diff --git a/test/ruby/test_comparable.rb b/test/ruby/test_comparable.rb
index 1912472423..efa630f8d9 100644
--- a/test/ruby/test_comparable.rb
+++ b/test/ruby/test_comparable.rb
@@ -1,5 +1,4 @@
 require 'test/unit'
-require_relative 'envutil'
 
 class TestComparable < Test::Unit::TestCase
   def setup
diff --git a/test/ruby/test_const.rb b/test/ruby/test_const.rb
index c4a4d93249..8b3acfb683 100644
--- a/test/ruby/test_const.rb
+++ b/test/ruby/test_const.rb
@@ -1,6 +1,5 @@
 # -*- coding: us-ascii -*-
 require 'test/unit'
-require_relative 'envutil'
 
 class TestConst < Test::Unit::TestCase
   TEST1 = 1
diff --git a/test/ruby/test_continuation.rb b/test/ruby/test_continuation.rb
index 52d8de482c..81125183ff 100644
--- a/test/ruby/test_continuation.rb
+++ b/test/ruby/test_continuation.rb
@@ -1,7 +1,6 @@
 require 'test/unit'
 require 'continuation'
 require 'fiber'
-require_relative 'envutil'
 
 class TestContinuation < Test::Unit::TestCase
   def test_create
diff --git a/test/ruby/test_defined.rb b/test/ruby/test_defined.rb
index 657f7934f8..d5e84185cc 100644
--- a/test/ruby/test_defined.rb
+++ b/test/ruby/test_defined.rb
@@ -1,5 +1,4 @@
 require 'test/unit'
-require_relative 'envutil'
 
 class TestDefined < Test::Unit::TestCase
   class Foo
diff --git a/test/ruby/test_dir_m17n.rb b/test/ruby/test_dir_m17n.rb
index 091c12c797..0547f2e62e 100644
--- a/test/ruby/test_dir_m17n.rb
+++ b/test/ruby/test_dir_m17n.rb
@@ -1,6 +1,5 @@
 require 'test/unit'
 require 'tmpdir'
-require_relative 'envutil'
 
 class TestDir_M17N < Test::Unit::TestCase
   def with_tmpdir
diff --git a/test/ruby/test_econv.rb b/test/ruby/test_econv.rb
index 6bfd6ba136..f423ebfc9e 100644
--- a/test/ruby/test_econv.rb
+++ b/test/ruby/test_econv.rb
@@ -1,5 +1,4 @@
 require 'test/unit'
-require_relative 'envutil'
 
 class TestEncodingConverter < Test::Unit::TestCase
   def check_ec(edst, esrc, eres, dst, src, ec, off, len, opts=nil)
diff --git a/test/ruby/test_encoding.rb b/test/ruby/test_encoding.rb
index e3b15eb277..63c56e2cd3 100644
--- a/test/ruby/test_encoding.rb
+++ b/test/ruby/test_encoding.rb
@@ -1,5 +1,4 @@
 require 'test/unit'
-require_relative 'envutil'
 
 class TestEncoding < Test::Unit::TestCase
 
diff --git a/test/ruby/test_enumerator.rb b/test/ruby/test_enumerator.rb
index f2a7afa3c1..b5ced3b12c 100644
--- a/test/ruby/test_enumerator.rb
+++ b/test/ruby/test_enumerator.rb
@@ -1,5 +1,4 @@
 require 'test/unit'
-require_relative 'envutil'
 
 class TestEnumerator < Test::Unit::TestCase
   def setup
diff --git a/test/ruby/test_env.rb b/test/ruby/test_env.rb
index 52cc487858..88a7631863 100644
--- a/test/ruby/test_env.rb
+++ b/test/ruby/test_env.rb
@@ -1,5 +1,4 @@
 require 'test/unit'
-require_relative 'envutil'
 
 class TestEnv < Test::Unit::TestCase
   IGNORE_CASE = /bccwin|mswin|mingw/ =~ RUBY_PLATFORM
diff --git a/test/ruby/test_eval.rb b/test/ruby/test_eval.rb
index 315cc72599..1ad186f869 100644
--- a/test/ruby/test_eval.rb
+++ b/test/ruby/test_eval.rb
@@ -1,5 +1,4 @@
 require 'test/unit'
-require_relative 'envutil'
 
 class TestEval < Test::Unit::TestCase
 
diff --git a/test/ruby/test_exception.rb b/test/ruby/test_exception.rb
index bb291c08d4..4659def1ea 100644
--- a/test/ruby/test_exception.rb
+++ b/test/ruby/test_exception.rb
@@ -1,6 +1,5 @@
 require 'test/unit'
 require 'tempfile'
-require_relative 'envutil'
 
 class TestException < Test::Unit::TestCase
   def test_exception_rescued
diff --git a/test/ruby/test_fiber.rb b/test/ruby/test_fiber.rb
index ed071acb39..4acfb139e0 100644
--- a/test/ruby/test_fiber.rb
+++ b/test/ruby/test_fiber.rb
@@ -2,7 +2,6 @@ require 'test/unit'
 require 'fiber'
 require 'continuation'
 require 'tmpdir'
-require_relative './envutil'
 
 class TestFiber < Test::Unit::TestCase
   def test_normal
diff --git a/test/ruby/test_file.rb b/test/ruby/test_file.rb
index 974752c853..0825c5dd7b 100644
--- a/test/ruby/test_file.rb
+++ b/test/ruby/test_file.rb
@@ -1,7 +1,6 @@
 require 'test/unit'
 require 'tempfile'
 require "thread"
-require_relative 'envutil'
 require_relative 'ut_eof'
 
 class TestFile < Test::Unit::TestCase
diff --git a/test/ruby/test_file_exhaustive.rb b/test/ruby/test_file_exhaustive.rb
index bd69addef6..59ed117db8 100644
--- a/test/ruby/test_file_exhaustive.rb
+++ b/test/ruby/test_file_exhaustive.rb
@@ -1,7 +1,6 @@
 require "test/unit"
 require "fileutils"
 require "tmpdir"
-require_relative "envutil"
 
 class TestFileExhaustive < Test::Unit::TestCase
   DRIVE = Dir.pwd[%r'\A(?:[a-z]:|//[^/]+/[^/]+)'i]
diff --git a/test/ruby/test_flip.rb b/test/ruby/test_flip.rb
index fc62d93ae6..84f7bf0562 100644
--- a/test/ruby/test_flip.rb
+++ b/test/ruby/test_flip.rb
@@ -1,5 +1,4 @@
 require 'test/unit'
-require_relative 'envutil'
 
 class TestFlip < Test::Unit::TestCase
   def test_hidden_key
diff --git a/test/ruby/test_float.rb b/test/ruby/test_float.rb
index 30725e8395..ac2d84352b 100644
--- a/test/ruby/test_float.rb
+++ b/test/ruby/test_float.rb
@@ -1,5 +1,4 @@
 require 'test/unit'
-require_relative 'envutil'
 
 class TestFloat < Test::Unit::TestCase
   include EnvUtil
diff --git a/test/ruby/test_fnmatch.rb b/test/ruby/test_fnmatch.rb
index 15e5d79e35..a0eab545e4 100644
--- a/test/ruby/test_fnmatch.rb
+++ b/test/ruby/test_fnmatch.rb
@@ -1,5 +1,4 @@
 require 'test/unit'
-require_relative 'envutil'
 
 class TestFnmatch < Test::Unit::TestCase
 
diff --git a/test/ruby/test_gc.rb b/test/ruby/test_gc.rb
index 6d1f93c2c6..9baf429279 100644
--- a/test/ruby/test_gc.rb
+++ b/test/ruby/test_gc.rb
@@ -1,7 +1,5 @@
 require 'test/unit'
 
-require_relative "envutil"
-
 class TestGc < Test::Unit::TestCase
   class S
     def initialize(a)
diff --git a/test/ruby/test_hash.rb b/test/ruby/test_hash.rb
index 4431552dd9..da07df94b6 100644
--- a/test/ruby/test_hash.rb
+++ b/test/ruby/test_hash.rb
@@ -1,7 +1,6 @@
 # -*- coding: us-ascii -*-
 require 'test/unit'
 require 'continuation'
-require_relative 'envutil'
 
 class TestHash < Test::Unit::TestCase
 
diff --git a/test/ruby/test_io.rb b/test/ruby/test_io.rb
index af77da2777..2d8072a830 100644
--- a/test/ruby/test_io.rb
+++ b/test/ruby/test_io.rb
@@ -8,7 +8,6 @@ require 'stringio'
 require 'timeout'
 require 'tempfile'
 require 'weakref'
-require_relative 'envutil'
 
 class TestIO < Test::Unit::TestCase
   module Feature
diff --git a/test/ruby/test_io_m17n.rb b/test/ruby/test_io_m17n.rb
index de64a78f83..97512f0d61 100644
--- a/test/ruby/test_io_m17n.rb
+++ b/test/ruby/test_io_m17n.rb
@@ -2,7 +2,6 @@
 require 'test/unit'
 require 'tmpdir'
 require 'timeout'
-require_relative 'envutil'
 
 class TestIO_M17N < Test::Unit::TestCase
   ENCS = [
diff --git a/test/ruby/test_iseq.rb b/test/ruby/test_iseq.rb
index 94a814ce1b..79c41bb900 100644
--- a/test/ruby/test_iseq.rb
+++ b/test/ruby/test_iseq.rb
@@ -1,5 +1,4 @@
 require 'test/unit'
-require_relative 'envutil'
 
 class TestISeq < Test::Unit::TestCase
   ISeq = RubyVM::InstructionSequence
diff --git a/test/ruby/test_keyword.rb b/test/ruby/test_keyword.rb
index 95cbcc209c..d71108fd6f 100644
--- a/test/ruby/test_keyword.rb
+++ b/test/ruby/test_keyword.rb
@@ -1,5 +1,4 @@
 require 'test/unit'
-require_relative 'envutil'
 
 class TestKeywordArguments < Test::Unit::TestCase
   def f1(str: "foo", num: 424242)
diff --git a/test/ruby/test_lazy_enumerator.rb b/test/ruby/test_lazy_enumerator.rb
index 7bf9903ddc..75f24580ca 100644
--- a/test/ruby/test_lazy_enumerator.rb
+++ b/test/ruby/test_lazy_enumerator.rb
@@ -1,5 +1,4 @@
 require 'test/unit'
-require_relative 'envutil'
 
 class TestLazyEnumerator < Test::Unit::TestCase
   class Step
diff --git a/test/ruby/test_literal.rb b/test/ruby/test_literal.rb
index e4c35e03d9..036be5f470 100644
--- a/test/ruby/test_literal.rb
+++ b/test/ruby/test_literal.rb
@@ -1,6 +1,5 @@
 # -*- coding: us-ascii -*-
 require 'test/unit'
-require_relative 'envutil'
 
 class TestRubyLiteral < Test::Unit::TestCase
 
diff --git a/test/ruby/test_m17n.rb b/test/ruby/test_m17n.rb
index 6537b070c5..bbaf31f52a 100644
--- a/test/ruby/test_m17n.rb
+++ b/test/ruby/test_m17n.rb
@@ -1,6 +1,5 @@
 # coding: US-ASCII
 require 'test/unit'
-require_relative 'envutil'
 
 class TestM17N < Test::Unit::TestCase
   def assert_encoding(encname, actual, message=nil)
diff --git a/test/ruby/test_method.rb b/test/ruby/test_method.rb
index 97cc43071a..9fc2ab10eb 100644
--- a/test/ruby/test_method.rb
+++ b/test/ruby/test_method.rb
@@ -1,6 +1,5 @@
 # -*- coding: us-ascii -*-
 require 'test/unit'
-require_relative 'envutil'
 
 class TestMethod < Test::Unit::TestCase
   def setup
diff --git a/test/ruby/test_module.rb b/test/ruby/test_module.rb
index 324d45fb7a..5b1f787be0 100644
--- a/test/ruby/test_module.rb
+++ b/test/ruby/test_module.rb
@@ -1,6 +1,5 @@
 require 'test/unit'
 require 'pp'
-require_relative 'envutil'
 
 $m0 = Module.nesting
 
diff --git a/test/ruby/test_numeric.rb b/test/ruby/test_numeric.rb
index b42509dd1a..e818d52e3f 100644
--- a/test/ruby/test_numeric.rb
+++ b/test/ruby/test_numeric.rb
@@ -1,5 +1,4 @@
 require 'test/unit'
-require_relative 'envutil'
 
 class TestNumeric < Test::Unit::TestCase
   class DummyNumeric < Numeric
diff --git a/test/ruby/test_object.rb b/test/ruby/test_object.rb
index a0f245a453..0fe9471fa6 100644
--- a/test/ruby/test_object.rb
+++ b/test/ruby/test_object.rb
@@ -1,6 +1,5 @@
 # -*- coding: us-ascii -*-
 require 'test/unit'
-require_relative 'envutil'
 
 class TestObject < Test::Unit::TestCase
   def setup
diff --git a/test/ruby/test_objectspace.rb b/test/ruby/test_objectspace.rb
index de7c6be916..4b8ae74a3c 100644
--- a/test/ruby/test_objectspace.rb
+++ b/test/ruby/test_objectspace.rb
@@ -1,5 +1,4 @@
 require 'test/unit'
-require_relative 'envutil'
 
 class TestObjectSpace < Test::Unit::TestCase
   def self.deftest_id2ref(obj)
diff --git a/test/ruby/test_proc.rb b/test/ruby/test_proc.rb
index 17778dfede..f760cce3ee 100644
--- a/test/ruby/test_proc.rb
+++ b/test/ruby/test_proc.rb
@@ -1,5 +1,4 @@
 require 'test/unit'
-require_relative 'envutil'
 
 class TestProc < Test::Unit::TestCase
   def setup
diff --git a/test/ruby/test_process.rb b/test/ruby/test_process.rb
index 5d252e116b..15a83a33ba 100644
--- a/test/ruby/test_process.rb
+++ b/test/ruby/test_process.rb
@@ -2,7 +2,6 @@ require 'test/unit'
 require 'tempfile'
 require 'timeout'
 require 'io/wait'
-require_relative 'envutil'
 require 'rbconfig'
 
 class TestProcess < Test::Unit::TestCase
diff --git a/test/ruby/test_rand.rb b/test/ruby/test_rand.rb
index 62efecb833..d2a1244b0b 100644
--- a/test/ruby/test_rand.rb
+++ b/test/ruby/test_rand.rb
@@ -1,5 +1,4 @@
 require 'test/unit'
-require_relative 'envutil'
 
 class TestRand < Test::Unit::TestCase
   def assert_random_int(ws, m, init = 0)
diff --git a/test/ruby/test_range.rb b/test/ruby/test_range.rb
index e3880bff93..f81047df06 100644
--- a/test/ruby/test_range.rb
+++ b/test/ruby/test_range.rb
@@ -2,7 +2,6 @@ require 'test/unit'
 require 'delegate'
 require 'timeout'
 require 'bigdecimal'
-require_relative 'envutil'
 
 class TestRange < Test::Unit::TestCase
   def test_range_string
diff --git a/test/ruby/test_refinement.rb b/test/ruby/test_refinement.rb
index 5a60a6afe9..11077b6e4d 100644
--- a/test/ruby/test_refinement.rb
+++ b/test/ruby/test_refinement.rb
@@ -1,5 +1,4 @@
 require 'test/unit'
-require_relative 'envutil'
 
 # to supress warnings for future calls of Module#refine
 EnvUtil.suppress_warning do
diff --git a/test/ruby/test_regexp.rb b/test/ruby/test_regexp.rb
index 1ef5bb2d1b..e16075ad38 100644
--- a/test/ruby/test_regexp.rb
+++ b/test/ruby/test_regexp.rb
@@ -1,6 +1,5 @@
 # coding: US-ASCII
 require 'test/unit'
-require_relative 'envutil'
 
 class TestRegexp < Test::Unit::TestCase
   def setup
diff --git a/test/ruby/test_require.rb b/test/ruby/test_require.rb
index 971140afff..3b7f6a7977 100644
--- a/test/ruby/test_require.rb
+++ b/test/ruby/test_require.rb
@@ -1,7 +1,6 @@
 require 'test/unit'
 
 require 'tempfile'
-require_relative 'envutil'
 require 'tmpdir'
 
 class TestRequire < Test::Unit::TestCase
diff --git a/test/ruby/test_rubyoptions.rb b/test/ruby/test_rubyoptions.rb
index ac7cc7b210..31fe9aecb0 100644
--- a/test/ruby/test_rubyoptions.rb
+++ b/test/ruby/test_rubyoptions.rb
@@ -4,8 +4,6 @@ require 'test/unit'
 require 'tmpdir'
 require 'tempfile'
 
-require_relative 'envutil'
-
 class TestRubyOptions < Test::Unit::TestCase
   def write_file(filename, content)
     File.open(filename, "w") {|f|
diff --git a/test/ruby/test_settracefunc.rb b/test/ruby/test_settracefunc.rb
index b13eea09bd..44a9edee11 100644
--- a/test/ruby/test_settracefunc.rb
+++ b/test/ruby/test_settracefunc.rb
@@ -1,5 +1,4 @@
 require 'test/unit'
-require_relative 'envutil'
 
 class TestSetTraceFunc < Test::Unit::TestCase
   def setup
diff --git a/test/ruby/test_signal.rb b/test/ruby/test_signal.rb
index e74a2c4e1e..4a59aa66c8 100644
--- a/test/ruby/test_signal.rb
+++ b/test/ruby/test_signal.rb
@@ -1,7 +1,6 @@
 require 'test/unit'
 require 'timeout'
 require 'tempfile'
-require_relative 'envutil'
 
 class TestSignal < Test::Unit::TestCase
   def test_signal
diff --git a/test/ruby/test_string.rb b/test/ruby/test_string.rb
index 543c1389bd..c0fd83e107 100644
--- a/test/ruby/test_string.rb
+++ b/test/ruby/test_string.rb
@@ -1,5 +1,4 @@
 require 'test/unit'
-require_relative 'envutil'
 
 # use of $= is deprecated after 1.7.1
 def pre_1_7_1
diff --git a/test/ruby/test_struct.rb b/test/ruby/test_struct.rb
index 37366c317e..71d93fb09d 100644
--- a/test/ruby/test_struct.rb
+++ b/test/ruby/test_struct.rb
@@ -1,7 +1,6 @@
 # -*- coding: us-ascii -*-
 require 'test/unit'
 require 'timeout'
-require_relative 'envutil'
 
 module TestStruct
   def test_struct
diff --git a/test/ruby/test_super.rb b/test/ruby/test_super.rb
index e4d3b8d57a..7d4048b342 100644
--- a/test/ruby/test_super.rb
+++ b/test/ruby/test_super.rb
@@ -1,5 +1,4 @@
 require 'test/unit'
-require_relative 'envutil'
 
 class TestSuper < Test::Unit::TestCase
   class Base
diff --git a/test/ruby/test_syntax.rb b/test/ruby/test_syntax.rb
index e70470555c..00e21606c6 100644
--- a/test/ruby/test_syntax.rb
+++ b/test/ruby/test_syntax.rb
@@ -1,11 +1,10 @@
 require 'test/unit'
-require_relative 'envutil'
 
 class TestSyntax < Test::Unit::TestCase
   def assert_syntax_files(test)
     srcdir = File.expand_path("../../..", __FILE__)
     srcdir = File.join(srcdir, test)
-    assert_separately(%W[--disable-gem -r#{__dir__}/envutil - #{srcdir}],
+    assert_separately(%W[--disable-gem - #{srcdir}],
                       __FILE__, __LINE__, <<-'eom', timeout: Float::INFINITY)
       dir = ARGV.shift
       for script in Dir["#{dir}/**/*.rb"].sort
diff --git a/test/ruby/test_system.rb b/test/ruby/test_system.rb
index 9e4369540a..b328cbcc1d 100644
--- a/test/ruby/test_system.rb
+++ b/test/ruby/test_system.rb
@@ -1,6 +1,5 @@
 require 'test/unit'
 require 'tmpdir'
-require_relative 'envutil'
 
 class TestSystem < Test::Unit::TestCase
   def test_system
diff --git a/test/ruby/test_thread.rb b/test/ruby/test_thread.rb
index 65636d9855..fba4737009 100644
--- a/test/ruby/test_thread.rb
+++ b/test/ruby/test_thread.rb
@@ -1,7 +1,6 @@
 # -*- coding: us-ascii -*-
 require 'test/unit'
 require 'thread'
-require_relative 'envutil'
 
 class TestThread < Test::Unit::TestCase
   class Thread < ::Thread
@@ -124,7 +123,6 @@ class TestThread < Test::Unit::TestCase
     dir = File.dirname(__FILE__)
     lbtest = File.join(dir, "lbtest.rb")
     $:.unshift File.join(File.dirname(dir), 'ruby')
-    require 'envutil'
     $:.shift
     3.times {
       `#{EnvUtil.rubybin} #{lbtest}`
diff --git a/test/ruby/test_threadgroup.rb b/test/ruby/test_threadgroup.rb
index f4c03de67e..e158f5ada4 100644
--- a/test/ruby/test_threadgroup.rb
+++ b/test/ruby/test_threadgroup.rb
@@ -1,6 +1,5 @@
 require 'test/unit'
 require 'thread'
-require_relative 'envutil'
 
 class TestThreadGroup < Test::Unit::TestCase
   def test_thread_init
diff --git a/test/ruby/test_time.rb b/test/ruby/test_time.rb
index a57cd5d72c..cfbf42d6f6 100644
--- a/test/ruby/test_time.rb
+++ b/test/ruby/test_time.rb
@@ -2,7 +2,6 @@ require 'test/unit'
 require 'delegate'
 require 'timeout'
 require 'delegate'
-require_relative 'envutil'
 
 class TestTime < Test::Unit::TestCase
   def setup
diff --git a/test/ruby/test_transcode.rb b/test/ruby/test_transcode.rb
index 5f3f51a676..0306dc3e87 100644
--- a/test/ruby/test_transcode.rb
+++ b/test/ruby/test_transcode.rb
@@ -2,7 +2,7 @@
 # some of the comments are in UTF-8
 
 require 'test/unit'
-require_relative 'envutil'
+
 class TestTranscode < Test::Unit::TestCase
   def test_errors
     assert_raise(Encoding::ConverterNotFoundError) { 'abc'.encode('foo', 'bar') }
diff --git a/test/ruby/test_unicode_escape.rb b/test/ruby/test_unicode_escape.rb
index 2561b49486..9d0d787e98 100644
--- a/test/ruby/test_unicode_escape.rb
+++ b/test/ruby/test_unicode_escape.rb
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 
 require 'test/unit'
-require_relative 'envutil'
 
 class TestUnicodeEscape < Test::Unit::TestCase
   def test_basic
diff --git a/test/ruby/test_variable.rb b/test/ruby/test_variable.rb
index 308839df14..8dc5c2fe55 100644
--- a/test/ruby/test_variable.rb
+++ b/test/ruby/test_variable.rb
@@ -1,5 +1,4 @@
 require 'test/unit'
-require_relative 'envutil'
 
 class TestVariable < Test::Unit::TestCase
   class Gods
diff --git a/test/ruby/test_weakmap.rb b/test/ruby/test_weakmap.rb
index 94590a07ff..1279944a37 100644
--- a/test/ruby/test_weakmap.rb
+++ b/test/ruby/test_weakmap.rb
@@ -1,5 +1,4 @@
 require 'test/unit'
-require_relative 'envutil'
 
 class TestWeakMap < Test::Unit::TestCase
   def setup
diff --git a/test/ruby/test_whileuntil.rb b/test/ruby/test_whileuntil.rb
index ca853af944..3d8dbee994 100644
--- a/test/ruby/test_whileuntil.rb
+++ b/test/ruby/test_whileuntil.rb
@@ -1,6 +1,5 @@
 require 'test/unit'
 require 'tmpdir'
-require_relative 'envutil'
 
 class TestWhileuntil < Test::Unit::TestCase
   def test_while
diff --git a/test/runner.rb b/test/runner.rb
index 0e6ee3bea4..11db537596 100644
--- a/test/runner.rb
+++ b/test/runner.rb
@@ -5,7 +5,6 @@ $LOAD_PATH << src_testdir
 $LOAD_PATH.unshift "#{src_testdir}/lib"
 
 require 'test/unit'
-require_relative 'ruby/envutil'
 
 module Gem
 end
diff --git a/test/sdbm/test_sdbm.rb b/test/sdbm/test_sdbm.rb
index 7a42e78e98..f415584fa2 100644
--- a/test/sdbm/test_sdbm.rb
+++ b/test/sdbm/test_sdbm.rb
@@ -1,6 +1,5 @@
 require 'test/unit'
 require 'tmpdir'
-require_relative '../ruby/envutil'
 
 begin
   require 'sdbm'
diff --git a/test/shell/test_command_processor.rb b/test/shell/test_command_processor.rb
index 2d3f8a4b1a..66e4244ad3 100644
--- a/test/shell/test_command_processor.rb
+++ b/test/shell/test_command_processor.rb
@@ -1,6 +1,5 @@
 require 'shell'
 require 'tmpdir'
-require_relative '../ruby/envutil'
 
 class TestShell < Test::Unit::TestCase
 end
diff --git a/test/test_mathn.rb b/test/test_mathn.rb
index bbb88517cf..8a482f3fed 100644
--- a/test/test_mathn.rb
+++ b/test/test_mathn.rb
@@ -1,5 +1,4 @@
 require 'test/unit'
-require_relative 'ruby/envutil'
 
 # mathn redefines too much. It must be isolated to child processes.
 class TestMathn < Test::Unit::TestCase
diff --git a/test/test_open3.rb b/test/test_open3.rb
index cd63034f1e..46a991da2d 100644
--- a/test/test_open3.rb
+++ b/test/test_open3.rb
@@ -1,6 +1,5 @@
 require 'test/unit'
 require 'open3'
-require_relative 'ruby/envutil'
 
 class TestOpen3 < Test::Unit::TestCase
   RUBY = EnvUtil.rubybin
diff --git a/test/test_pstore.rb b/test/test_pstore.rb
index 522f2d1fb3..e028ed68b4 100644
--- a/test/test_pstore.rb
+++ b/test/test_pstore.rb
@@ -1,7 +1,6 @@
 require 'test/unit'
 require 'pstore'
 require 'tmpdir'
-require_relative 'ruby/envutil'
 
 class PStoreTest < Test::Unit::TestCase
   def setup
diff --git a/test/test_pty.rb b/test/test_pty.rb
index 7639f6ac77..0ec4f967bd 100644
--- a/test/test_pty.rb
+++ b/test/test_pty.rb
@@ -1,5 +1,4 @@
 require 'test/unit'
-require_relative 'ruby/envutil'
 require 'shellwords'
 require 'tmpdir'
 
diff --git a/test/test_tempfile.rb b/test/test_tempfile.rb
index eb61120b69..2fe62d37c5 100644
--- a/test/test_tempfile.rb
+++ b/test/test_tempfile.rb
@@ -1,7 +1,6 @@
 require 'test/unit'
 require 'tempfile'
 require 'thread'
-require_relative 'ruby/envutil'
 
 class TestTempfile < Test::Unit::TestCase
   def initialize(*)
diff --git a/test/test_time.rb b/test/test_time.rb
index dff559f951..f39713b249 100644
--- a/test/test_time.rb
+++ b/test/test_time.rb
@@ -1,6 +1,5 @@
 require 'time'
 require 'test/unit'
-require_relative 'ruby/envutil.rb'
 
 class TestTimeExtension < Test::Unit::TestCase # :nodoc:
   def test_rfc822
diff --git a/test/test_tracer.rb b/test/test_tracer.rb
index c8336953d2..ff3ba87be6 100644
--- a/test/test_tracer.rb
+++ b/test/test_tracer.rb
@@ -1,6 +1,5 @@
 require 'test/unit'
 require 'tmpdir'
-require_relative 'ruby/envutil'
 
 class TestTracer < Test::Unit::TestCase
   include EnvUtil
diff --git a/test/test_weakref.rb b/test/test_weakref.rb
index f12e943423..129c1e6ed1 100644
--- a/test/test_weakref.rb
+++ b/test/test_weakref.rb
@@ -1,6 +1,5 @@
 require 'test/unit'
 require 'weakref'
-require_relative './ruby/envutil'
 
 class TestWeakRef < Test::Unit::TestCase
   def make_weakref(level = 10)
diff --git a/test/testunit/test_rake_integration.rb b/test/testunit/test_rake_integration.rb
index 0770404287..0d0f8ef4f9 100644
--- a/test/testunit/test_rake_integration.rb
+++ b/test/testunit/test_rake_integration.rb
@@ -1,6 +1,5 @@
 require 'minitest/autorun'
 require 'tmpdir'
-require_relative '../ruby/envutil'
 
 class RakeIntegration < MiniTest::Unit::TestCase
   include Test::Unit::Assertions
diff --git a/test/thread/test_cv.rb b/test/thread/test_cv.rb
index db6067e71c..b399b479f4 100644
--- a/test/thread/test_cv.rb
+++ b/test/thread/test_cv.rb
@@ -1,7 +1,6 @@
 require 'test/unit'
 require 'thread'
 require 'tmpdir'
-require_relative '../ruby/envutil'
 
 class TestConditionVariable < Test::Unit::TestCase
   def test_initialized
diff --git a/test/thread/test_queue.rb b/test/thread/test_queue.rb
index 4f495ccb8c..2bd71dbfc9 100644
--- a/test/thread/test_queue.rb
+++ b/test/thread/test_queue.rb
@@ -2,7 +2,6 @@ require 'test/unit'
 require 'thread'
 require 'tmpdir'
 require 'timeout'
-require_relative '../ruby/envutil'
 
 class TestQueue < Test::Unit::TestCase
   def test_queue_initialized
diff --git a/test/uri/test_common.rb b/test/uri/test_common.rb
index 24a5325522..562041535e 100644
--- a/test/uri/test_common.rb
+++ b/test/uri/test_common.rb
@@ -1,6 +1,5 @@
 require 'test/unit'
 require 'uri'
-require_relative '../ruby/envutil'
 
 module URI
 
diff --git a/test/webrick/utils.rb b/test/webrick/utils.rb
index 0e94ad34da..71559a5628 100644
--- a/test/webrick/utils.rb
+++ b/test/webrick/utils.rb
@@ -1,4 +1,3 @@
-require_relative '../ruby/envutil'
 require "webrick"
 begin
   require "webrick/https"