diff --git a/ChangeLog b/ChangeLog
index 4abd7449f5..0f58a8658f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,16 @@
+Thu Jan  4 20:01:29 2007  Koichi Sasada  <ko1@atdot.net>
+
+	* common.mk : rename yarv-test-[all/each] to compare-test[/-each].
+	purpose of "compare-test" rule is to compare ruby (trunk) and
+	matzruby (branches/matzruby) binary in miniruby level.  MATZRUBY
+	parameter means an path to miniruby of matzruby binary.  to do this
+	comparison test, you should build matzruby branch.
+
+	* yarvtest/yarvtest.rb : fix to use command line option as
+	command names to be compared.
+
+	* yarvtest/runner.rb : remove a debug output.
+
 Thu Jan  4 19:12:27 2007  Koichi Sasada  <ko1@atdot.net>
 
 	* common.mk : fix to use test.rb script in build directory.
diff --git a/common.mk b/common.mk
index f82e9b1b22..cacb7e0108 100644
--- a/common.mk
+++ b/common.mk
@@ -523,6 +523,7 @@ blockinlining.$(OBJEXT): {$(VPATH)}yarv.h {$(VPATH)}yarvcore.h vm_opts.h
 
 
 BASERUBY = ruby
+MATZRUBY = ruby
 
 INSNS2VMOPT = $(CPPFLAGS) --srcdir=$(srcdir)
 
@@ -559,11 +560,11 @@ incs:
 docs:
 	$(BASERUBY) -I$(srcdir) $(srcdir)/tool/makedocs.rb $(INSNS2VMOPT)
 
-yarv-test-all: miniruby$(EXEEXT)
-	$(BASERUBY) -I$(srcdir) $(srcdir)/yarvtest/runner.rb $(OPT) yarv=$(MINIRUBY) ruby=$(BASERUBY)
+compare-test: miniruby$(EXEEXT)
+	$(BASERUBY) -I$(srcdir) $(srcdir)/yarvtest/runner.rb $(OPT) ruby=$(MINIRUBY) matzruby=$(MATZRUBY)
 
-yarv-test-each: miniruby$(EXEEXT)
-	$(BASERUBY) -I$(srcdir) $(srcdir)/yarvtest/test_$(ITEM).rb $(OPT) yarv=$(MINIRUBY) ruby=$(BASERUBY)
+compare-test-each: miniruby$(EXEEXT)
+	$(BASERUBY) -I$(srcdir) $(srcdir)/yarvtest/test_$(ITEM).rb $(OPT) ruby=$(MINIRUBY) matzruby=$(MATZRUBY)
 
 allload: miniruby$(EXEEXT)
 	$(MINIRUBY) -I$(srcdir) $(srcdir)/tool/allload.rb `$(BASERUBY) -rrbconfig -e 'print Config::CONFIG["rubylibdir"]'`
diff --git a/yarvtest/runner.rb b/yarvtest/runner.rb
index 25b813e99c..003967b804 100644
--- a/yarvtest/runner.rb
+++ b/yarvtest/runner.rb
@@ -1,10 +1,9 @@
-require 'test/unit'
-
-if $0 == __FILE__
-  # exit Test::Unit::AutoRunner.run(false, File.dirname($0))
-  Dir.glob(File.dirname($0) + '/test_*'){|file|
-    p file
-    require file
-  }
-end
-
+require 'test/unit'
+
+if $0 == __FILE__
+  # exit Test::Unit::AutoRunner.run(false, File.dirname($0))
+  Dir.glob(File.dirname($0) + '/test_*'){|file|
+    require file
+  }
+end
+
diff --git a/yarvtest/yarvtest.rb b/yarvtest/yarvtest.rb
index 906af727b4..20085efe19 100644
--- a/yarvtest/yarvtest.rb
+++ b/yarvtest/yarvtest.rb
@@ -1,136 +1,110 @@
-require 'test/unit'
-
-if defined? YARV_PATCHED
-require 'yarvutil'
-
-class YarvTestBase < Test::Unit::TestCase
-
-  def remove_const sym
-    Object.module_eval{
-      remove_const sym
-    }
-  end
-
-  def remove_method sym
-    Object.module_eval{
-      undef sym
-    }
-  end
-  
-  def ae str
-    # puts str
-    # puts YARVUtil.parse(str, $0, 0).disasm
-
-    ruby = YARVUtil.eval_in_wrap(str)
-    yield if block_given?
-
-    yarv = YARVUtil.eval(str)
-    yield if block_given?
-
-    assert_equal(ruby, yarv)
-  end
-  
-  def test_
-  end
-
-end
-
-else
-
-require 'rbconfig'
-class YarvTestBase < Test::Unit::TestCase
-  def initialize *args
-    super
-
-    if /mswin32/ !~ RUBY_PLATFORM
-      @yarv = './miniruby'
-    else
-      @yarv = 'miniruby'
-    end
-    @ruby = Config::CONFIG['ruby_install_name']
-  end
-
-  def remove_const sym
-    Object.module_eval{
-      remove_const sym
-    }
-  end
-
-  def remove_method sym
-    Object.module_eval{
-      undef sym
-    }
-  end
-
-  require 'tempfile'
-  def exec exec_file, program
-    dir = []
-    dir << ENV['RAMDISK'] if ENV['RAMDISK']
-    tmpf = Tempfile.new("yarvtest_#{Process.pid}_#{Time.now.to_i}", *dir)
-    tmpf.write program
-    tmpf.close
-    result = `#{exec_file} #{tmpf.path}`
-    tmpf.open
-    tmpf.close(true)
-    result
-  end
-
-  def dump_and_exec exec_file, str
-    asmstr = <<-EOASMSTR
-      iseq = YARVCore::InstructionSequence.compile(<<-'EOS__')
-      #{str}
-      EOS__
-      p YARVCore::InstructionSequence.load(iseq.to_a).eval
-    EOASMSTR
-
-    exec(exec_file, asmstr)
-  end
-
-  def exec_ exec_file, program
-    exec_file.tr!('\\', '/')
-    r = ''
-    IO.popen("#{exec_file}", 'r+'){|io|
-      #
-      io.write program
-      io.close_write
-      begin
-        while line = io.gets
-          r << line
-          # p line
-        end
-      rescue => e
-        # p e
-      end
-    }
-    r
-  end
-  
-  def ae str
-    evalstr = %{
-      p eval(%q{
-        #{str}
-      })
-    }
-
-    ruby = exec(@ruby, evalstr)
-    yarv = exec(@yarv, evalstr)
-
-    if $DEBUG #|| true
-      puts "yarv (#@yarv): #{yarv}"
-      puts "ruby (#@ruby): #{ruby}"
-    end
-
-    assert_equal(ruby.gsub(/\r/, ''), yarv.gsub(/\r/, ''))
-
-    # store/load test
-    if false # || true
-      yarvasm = dump_and_exec(@yarv, str)
-      assert_equal(ruby.gsub(/\r/, ''), yarvasm.gsub(/\r/, ''))
-    end
-  end
-  
-  def test_
-  end
-end
-
-end
+require 'test/unit'
+require 'rbconfig'
+require 'optparse'
+
+if /mswin32/ !~ RUBY_PLATFORM
+  $ruby = './miniruby'
+else
+  $ruby = 'miniruby'
+end
+$matzruby = Config::CONFIG['ruby_install_name']
+
+ARGV.each{|opt|
+  if /\Aruby=(.+)/ =~ opt
+    $ruby = $1
+  elsif /\Amatzruby=(.+)/ =~ opt
+    $matzruby = $1
+  end
+}
+
+puts "matzruby: #{`#{$matzruby} -v`}"
+puts "ruby    : #{`#{$ruby} -v`}"
+
+class YarvTestBase < Test::Unit::TestCase
+  def initialize *args
+    super
+
+  end
+
+  def remove_const sym
+    Object.module_eval{
+      remove_const sym
+    }
+  end
+
+  def remove_method sym
+    Object.module_eval{
+      undef sym
+    }
+  end
+
+  require 'tempfile'
+  def exec exec_file, program
+    dir = []
+    dir << ENV['RAMDISK'] if ENV['RAMDISK']
+    tmpf = Tempfile.new("yarvtest_#{Process.pid}_#{Time.now.to_i}", *dir)
+    tmpf.write program
+    tmpf.close
+    result = `#{exec_file} #{tmpf.path}`
+    tmpf.open
+    tmpf.close(true)
+    result
+  end
+
+  def dump_and_exec exec_file, str
+    asmstr = <<-EOASMSTR
+      iseq = YARVCore::InstructionSequence.compile(<<-'EOS__')
+      #{str}
+      EOS__
+      p YARVCore::InstructionSequence.load(iseq.to_a).eval
+    EOASMSTR
+
+    exec(exec_file, asmstr)
+  end
+
+  def exec_ exec_file, program
+    exec_file.tr!('\\', '/')
+    r = ''
+    IO.popen("#{exec_file}", 'r+'){|io|
+      #
+      io.write program
+      io.close_write
+      begin
+        while line = io.gets
+          r << line
+          # p line
+        end
+      rescue => e
+        # p e
+      end
+    }
+    r
+  end
+  
+  def ae str
+    evalstr = %{
+      p eval(%q{
+        #{str}
+      })
+    }
+
+    matzruby = exec($matzruby, evalstr)
+    ruby = exec($ruby, evalstr)
+
+    if $DEBUG #|| true
+      puts "matzruby (#$matzruby): #{matzruby}"
+      puts "ruby     (#$ruby): #{ruby}"
+    end
+
+    assert_equal(ruby.gsub(/\r/, ''), ruby.gsub(/\r/, ''))
+
+    # store/load test
+    if false # || true
+      yarvasm = dump_and_exec($ruby, str)
+      assert_equal(ruby.gsub(/\r/, ''), yarvasm.gsub(/\r/, ''))
+    end
+  end
+  
+  def test_
+  end
+end