diff --git a/ChangeLog b/ChangeLog
index 8e39c73ef6..146b630337 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Sat Jun 26 10:08:36 2010  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* test/ruby/envutil.rb (EnvUtil#invoke_ruby): no needs to copy the
+	  original ENV, since it's done in spawn automatically.
+	  [ruby-dev:41733]
+
 Sat Jun 26 08:44:22 2010  Yusuke Endoh  <mame@tsg.ne.jp>
 
 	* NEWS (zlib): new methods.  [ruby-dev:41706] [Bug #3472]
diff --git a/test/ruby/envutil.rb b/test/ruby/envutil.rb
index 8cbc7c3e12..0703ee4f0d 100644
--- a/test/ruby/envutil.rb
+++ b/test/ruby/envutil.rb
@@ -78,7 +78,7 @@ module EnvUtil
         err_p.set_encoding(enc) if err_p
       end
       c = "C"
-      child_env = ENV.dup
+      child_env = {}
       LANG_ENVS.each {|lc| child_env[lc] = c}
       case args.first
       when Hash