diff --git a/ChangeLog b/ChangeLog
index aac8a55b8b..4fc37a9431 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Tue Apr 23 10:26:50 2013  Akinori MUSHA  <knu@iDaemons.org>
+
+	* test/ruby/test_module.rb
+	  (TestModule#test_const_get_invalid_name)
+	  (test_const_defined_invalid_name): Fix expected values.
+
 Tue Apr 23 09:51:26 2013  Akinori MUSHA  <knu@iDaemons.org>
 
 	* string.c (rb_str_inspect): NUL should not be represented as "\0"
diff --git a/test/ruby/test_module.rb b/test/ruby/test_module.rb
index a84aff2004..75fd81247a 100644
--- a/test/ruby/test_module.rb
+++ b/test/ruby/test_module.rb
@@ -609,7 +609,7 @@ class TestModule < Test::Unit::TestCase
     assert_raise(TypeError, bug5084) { c1.const_get(1) }
     bug7574 = '[ruby-dev:46749]'
     e = assert_raise(NameError) { Object.const_get("String\0") }
-    assert_equal("wrong constant name \"String\\0\"", e.message, bug7574)
+    assert_equal("wrong constant name \"String\\000\"", e.message, bug7574)
   end
 
   def test_const_defined_invalid_name
@@ -619,7 +619,7 @@ class TestModule < Test::Unit::TestCase
     assert_raise(TypeError, bug5084) { c1.const_defined?(1) }
     bug7574 = '[ruby-dev:46749]'
     e = assert_raise(NameError) { Object.const_defined?("String\0") }
-    assert_equal("wrong constant name \"String\\0\"", e.message, bug7574)
+    assert_equal("wrong constant name \"String\\000\"", e.message, bug7574)
   end
 
   def test_const_get_no_inherited