diff --git a/ChangeLog b/ChangeLog
index ab1b39d4a8..ab59256241 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Thu Dec  8 13:11:26 2011  NAKAMURA Usaku  <usa@ruby-lang.org>
+
+	* test/ruby/test_process.rb (TestProcess#test_sete[gu]id): silently
+	  skip if not implemented such functions (such as, on Windows).
+
 Thu Dec  8 12:57:50 2011  NAKAMURA Usaku  <usa@ruby-lang.org>
 
 	* ext/socket/extconf.rb: forgotten to define HAVE_SOCKETPAIR for
diff --git a/test/ruby/test_process.rb b/test/ruby/test_process.rb
index 29f7ec8f1d..a1c5822417 100644
--- a/test/ruby/test_process.rb
+++ b/test/ruby/test_process.rb
@@ -1167,6 +1167,7 @@ class TestProcess < Test::Unit::TestCase
 
   def test_seteuid
     assert_nothing_raised(TypeError) {Process.euid += 0}
+  rescue NotImplementedError
   end
 
   def test_getegid
@@ -1175,6 +1176,7 @@ class TestProcess < Test::Unit::TestCase
 
   def test_setegid
     assert_nothing_raised(TypeError) {Process.egid += 0}
+  rescue NotImplementedError
   end
 
   def test_uid_re_exchangeable_p