diff --git a/ChangeLog b/ChangeLog
index 12cc173fef..b6b90a2f47 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,12 @@
+Sat Sep 29 19:41:11 2012  Hiroshi Shirosaki  <h.shirosaki@gmail.com>
+
+	* test/drb/drbtest.rb (DRbCore#teardown):
+	  Use Process.kill :KILL on Windows because Process.kill :INT silently
+	  fails on Windows 7 and raises EINVAL on Windows XP for spawned
+	  process with new_pgroup: false.
+
+	* test/drb/drbtest.rb (DRbAry#teardown): ditto.
+
 Sat Sep 29 19:40:32 2012  Hiroshi Shirosaki  <h.shirosaki@gmail.com>
 
 	* test/ruby/test_unicode_escape.rb (TestUnicodeEscape#test_basic):
diff --git a/test/drb/drbtest.rb b/test/drb/drbtest.rb
index cb553eee59..ac0f5c6be9 100644
--- a/test/drb/drbtest.rb
+++ b/test/drb/drbtest.rb
@@ -76,7 +76,7 @@ module DRbCore
     while (@there&&@there.to_s rescue nil)
       # nop
     end
-    signal = /mswin|mingw/ =~ RUBY_PLATFORM ? :INT : :TERM
+    signal = /mswin|mingw/ =~ RUBY_PLATFORM ? :KILL : :TERM
     Thread.list.each {|th|
       if th.respond_to?(:pid) && th[:drb_service] == @service_name
         begin
@@ -297,7 +297,7 @@ module DRbAry
     while (@there&&@there.to_s rescue nil)
       # nop
     end
-    signal = /mswin|mingw/ =~ RUBY_PLATFORM ? :INT : :TERM
+    signal = /mswin|mingw/ =~ RUBY_PLATFORM ? :KILL : :TERM
     Thread.list.each {|th|
       if th.respond_to?(:pid) && th[:drb_service] == @service_name
         begin