diff --git a/ChangeLog b/ChangeLog
index ea5aa674a4..3c82b17ba9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Thu Aug 21 20:23:26 2008  Kazuhiro NISHIYAMA  <zn@mbf.nifty.com>
+
+	* test/ruby/test_m17n_comb.rb (TestM17NComb#test_str_crypt): add
+	  key and salt to error message.
+
 Thu Aug 21 19:20:25 2008  Tanaka Akira  <akr@fsij.org>
 
 	* file.c (rb_stat_inspect): don't raise if self is not initialized.
diff --git a/test/ruby/test_m17n_comb.rb b/test/ruby/test_m17n_comb.rb
index a9ca281367..37b1a687a2 100644
--- a/test/ruby/test_m17n_comb.rb
+++ b/test/ruby/test_m17n_comb.rb
@@ -797,7 +797,7 @@ class TestM17NComb < Test::Unit::TestCase
         next
       end
       t = str.crypt(salt)
-      assert_equal(a(str).crypt(a(salt)), t)
+      assert_equal(a(str).crypt(a(salt)), t, "#{encdump(str)}.crypt(#{encdump(salt)})")
       assert_encoding('ASCII-8BIT', t.encoding)
     }
   end