diff --git a/ChangeLog b/ChangeLog
index 304c325928..877a7dff55 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Fri Oct 17 00:39:19 2008  Yusuke Endoh  <mame@tsg.ne.jp>
+
+	* lib/test/unit.rb: sort the order of executing tests.
+
 Fri Oct 17 00:24:15 2008  Tanaka Akira  <akr@fsij.org>
 
 	* io.c (rb_io_binmode): reset encoding conversion.
diff --git a/lib/test/unit.rb b/lib/test/unit.rb
index 14ddc08f2e..d81a111631 100644
--- a/lib/test/unit.rb
+++ b/lib/test/unit.rb
@@ -152,6 +152,9 @@ EOT
 
     class TestCase < MiniTest::Unit::TestCase
       include Assertions
+      def self.test_order
+        :sorted
+      end
     end
   end
 end