diff --git a/ChangeLog b/ChangeLog
index a2925833b3..13d9aa8047 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Thu Jul 10 10:20:46 2008  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* test/ruby/test_string.rb (test_succ, test_succ!): reverted stale
+	  tests.  [ruby-core:17704]
+
 Thu Jul 10 02:12:29 2008  Yukihiro Matsumoto  <matz@ruby-lang.org>
 
 	* lib/irb/ruby-lex.rb: support for '\c'. [ruby-talk:263508]
diff --git a/test/ruby/test_string.rb b/test/ruby/test_string.rb
index 6bac7f1fee..4f2070ade0 100644
--- a/test/ruby/test_string.rb
+++ b/test/ruby/test_string.rb
@@ -27,7 +27,6 @@ class TestString < Test::Unit::TestCase
     assert_equal("1000", "999".succ)
     assert_equal("2.000", "1.999".succ)
 
-    assert_equal("No.10", "No.9".succ)
     assert_equal("2000aaa",  "1999zzz".succ)
     assert_equal("AAAAA000", "ZZZZ999".succ)
     assert_equal("*+", "**".succ)
@@ -75,10 +74,6 @@ class TestString < Test::Unit::TestCase
     assert_equal("*+", a.succ!)
     assert_equal("*+", a)
 
-    a = "No.9"
-    assert_equal("No.10", a.succ!)
-    assert_equal("No.10", a)
-
     assert_equal("aaaaaaaaaaaa", "zzzzzzzzzzz".succ!)
     assert_equal("aaaaaaaaaaaaaaaaaaaaaaaa", "zzzzzzzzzzzzzzzzzzzzzzz".succ!)
   end