diff --git a/ChangeLog b/ChangeLog
index 43b5853d9c..f615c2df46 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Thu Aug 14 02:45:16 2008  Kazuhiro NISHIYAMA  <zn@mbf.nifty.com>
+
+	* test/ruby/test_file_exhaustive.rb (TestFileExhaustive#setup):
+	  set group of tmpdir.
+
 Thu Aug 14 02:23:31 2008  Tanaka Akira  <akr@fsij.org>
 
 	* transcode.c (econv_primitive_convert): add output_byteoffset
diff --git a/test/ruby/test_file_exhaustive.rb b/test/ruby/test_file_exhaustive.rb
index 24072472e5..eda3669681 100644
--- a/test/ruby/test_file_exhaustive.rb
+++ b/test/ruby/test_file_exhaustive.rb
@@ -5,6 +5,7 @@ require "tmpdir"
 class TestFileExhaustive < Test::Unit::TestCase
   def setup
     @dir = Dir.mktmpdir("rubytest-file")
+    File.chown(-1, Process.gid, @dir)
     @file = make_tmp_filename("file")
     @zerofile = make_tmp_filename("zerofile")
     @nofile = make_tmp_filename("nofile")