diff --git a/ChangeLog b/ChangeLog
index d9a1fd8f11..d158a7f34b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Fri Apr 30 21:40:36 2010  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* test/test_open3.rb (TestOpen3#test_commandline): use simple
+	  command via shell.  [ruby-dev:41100]
+
 Fri Apr 30 12:05:20 2010  Tanaka Akira  <akr@fsij.org>
 
 	* file.c (file_expand_path): call rb_str_set_len before BUFCHECK to
diff --git a/test/test_open3.rb b/test/test_open3.rb
index 24b82e7ec9..a0586622c1 100644
--- a/test/test_open3.rb
+++ b/test/test_open3.rb
@@ -59,9 +59,9 @@ class TestOpen3 < Test::Unit::TestCase
   end
 
   def test_commandline
-    commandline = [RUBY, '-e', 'print :quux'].map{|s|/\s/=~s ? s.dump : s}.join(' ')
+    commandline = "echo quux\n"
     Open3.popen3(commandline) {|i,o,e,t|
-      assert_equal("quux", o.read)
+      assert_equal("quux\n", o.read)
     }
   end