diff --git a/ChangeLog b/ChangeLog
index 45d572d9a7..a76adc5c8c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Fri Feb 11 14:33:18 2011  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* lib/test/unit/assertions.rb (assert_no_match): alias for
+	  backward compatibility.
+
 Fri Feb 11 12:06:48 2011  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* ruby.c (add_gems, require_libraries, proc_options): add
diff --git a/lib/test/unit/assertions.rb b/lib/test/unit/assertions.rb
index 5a0c01a4fb..165c72d075 100644
--- a/lib/test/unit/assertions.rb
+++ b/lib/test/unit/assertions.rb
@@ -155,6 +155,7 @@ EOT
         mname = ('assert_not_' << m.to_s[/.*?_(.*)/, 1])
         alias_method(mname, m) unless ms.include? mname
       end
+      alias assert_no_match assert_not_match
 
       def build_message(head, template=nil, *arguments)
         template &&= template.chomp