diff --git a/ChangeLog b/ChangeLog
index e5ffba802f..c4568efafa 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Fri Dec 26 16:40:53 2003  Tanaka Akira  <akr@m17n.org>
+
+	* lib/pathname.rb (PathnameTest#test_plus): add 2 assertions.
+
 Fri Dec 26 14:05:13 2003  Minero Aoki  <aamine@loveruby.net>
 
 	* test/ruby/test_pack.rb: new test test_pack_N.
diff --git a/lib/pathname.rb b/lib/pathname.rb
index bf4dcf4d94..2ff2925d9e 100644
--- a/lib/pathname.rb
+++ b/lib/pathname.rb
@@ -776,9 +776,11 @@ if $0 == __FILE__
       assert_pathname_plus('/', '/', '..')
       assert_pathname_plus('.', 'a', '..')
       assert_pathname_plus('a', 'a/b', '..')
+      assert_pathname_plus('../..', '..', '..')
       assert_pathname_plus('/c', '/', '../c')
       assert_pathname_plus('c', 'a', '../c')
       assert_pathname_plus('a/c', 'a/b', '../c')
+      assert_pathname_plus('../../c', '..', '../c')
     end
   end
 end