diff --git a/ChangeLog b/ChangeLog
index 8ac5c8d0af..488d644e50 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,4 +1,7 @@
-Thu Apr 14 22:48:03 2011  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+Thu Apr 14 22:48:08 2011  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* lib/test/unit.rb (Test::Unit::Runner::Worker#initialize): use
+	  positional arguments instead of keyword arguments.
 
 	* lib/test/unit.rb (Test::Unit::Runner#jobs_status): io/console may
 	  not be available. use 80 as the last resort if IO#winsize and
diff --git a/lib/test/unit.rb b/lib/test/unit.rb
index d1f7383cb9..9e3a23ea43 100644
--- a/lib/test/unit.rb
+++ b/lib/test/unit.rb
@@ -233,13 +233,13 @@ module Test
           io = IO.popen([*ruby,
                         "#{File.dirname(__FILE__)}/unit/parallel.rb",
                         *args], "rb+")
-          new(io: io, pid: io.pid, status: :waiting)
+          new(io, io.pid, :waiting)
         end
 
-        def initialize(h={})
-          @io = h[:io]
-          @pid = h[:pid]
-          @status = h[:status]
+        def initialize(io, pid, status)
+          @io = io
+          @pid = pid
+          @status = status
           @file = nil
           @real_file = nil
           @loadpath = []