diff --git a/ChangeLog b/ChangeLog
index ef9c0af168..a243b3de6f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,13 @@
+Tue Mar  6 18:55:37 2012  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* lib/test/unit/assertions.rb (assert_send, assert_not_send):
+	  parenthesize non-empty arguments.
+
+Tue Mar  6 18:55:37 2012  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* lib/test/unit/assertions.rb (assert_send): make arguments in
+	  the default message clearer.
+
 Tue Mar  6 12:48:08 2012  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* ext/io/console/console.c (set_rawmode): clear ECHOE and ECHOK
diff --git a/lib/test/unit/assertions.rb b/lib/test/unit/assertions.rb
index 695a5ef3ca..39a3c85600 100644
--- a/lib/test/unit/assertions.rb
+++ b/lib/test/unit/assertions.rb
@@ -255,6 +255,58 @@ EOT
         super if !caller[0].rindex(MINI_DIR, 0) || !obj.respond_to?(meth)
       end
 
+      # :call-seq:
+      #   assert_send( +send_array+, failure_message = nil )
+      #
+      # Passes if the method send returns a true value.
+      #
+      # +send_array+ is composed of:
+      # * A receiver
+      # * A method
+      # * Arguments to the method
+      #
+      # Example:
+      #   assert_send([[1, 2], :member?, 1]) # -> pass
+      #   assert_send([[1, 2], :member?, 4]) # -> fail
+      def assert_send send_ary, m = nil
+        recv, msg, *args = send_ary
+        m = message(m) {
+          if args.empty?
+            argsstr = ""
+          else
+            (argsstr = mu_pp(args)).sub!(/\A\[(.*)\]\z/m, '(\1)')
+          end
+          "Expected #{mu_pp(recv)}.#{msg}#{argsstr} to return true"
+        }
+        assert recv.__send__(msg, *args), m
+      end
+
+      # :call-seq:
+      #   assert_not_send( +send_array+, failure_message = nil )
+      #
+      # Passes if the method send doesn't return a true value.
+      #
+      # +send_array+ is composed of:
+      # * A receiver
+      # * A method
+      # * Arguments to the method
+      #
+      # Example:
+      #   assert_not_send([[1, 2], :member?, 1]) # -> fail
+      #   assert_not_send([[1, 2], :member?, 4]) # -> pass
+      def assert_not_send send_ary, m = nil
+        recv, msg, *args = send_ary
+        m = message(m) {
+          if args.empty?
+            argsstr = ""
+          else
+            (argsstr = mu_pp(args)).sub!(/\A\[(.*)\]\z/m, '(\1)')
+          end
+          "Expected #{mu_pp(recv)}.#{msg}#{argsstr} to return false"
+        }
+        assert !recv.__send__(msg, *args), m
+      end
+
       ms = instance_methods(true).map {|sym| sym.to_s }
       ms.grep(/\Arefute_/) do |m|
         mname = ('assert_not_' << m.to_s[/.*?_(.*)/, 1])
diff --git a/version.h b/version.h
index ae3b7721e0..f222105f8d 100644
--- a/version.h
+++ b/version.h
@@ -1,5 +1,5 @@
 #define RUBY_VERSION "1.9.3"
-#define RUBY_PATCHLEVEL 162
+#define RUBY_PATCHLEVEL 163
 
 #define RUBY_RELEASE_DATE "2012-03-06"
 #define RUBY_RELEASE_YEAR 2012