diff --git a/ChangeLog b/ChangeLog
index 1a563068b5..ead2bb5bac 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,4 +1,6 @@
-Mon Dec  6 23:17:36 2010  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+Mon Dec  6 23:18:22 2010  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* test/mkmf/base.rb (TestMkmf#setup): run quietly.
 
 	* test/mkmf/test_find_executable.rb (test_find_executable): use
 	  configured results.
diff --git a/test/mkmf/base.rb b/test/mkmf/base.rb
index 1b5b89e17c..79f46ed202 100644
--- a/test/mkmf/base.rb
+++ b/test/mkmf/base.rb
@@ -14,16 +14,11 @@ class TestMkmf < Test::Unit::TestCase
     @curdir = Dir.pwd
     @mkmfobj = Object.new
     Dir.chdir(@tmpdir)
-    class << (@output = "")
-      def flush; end
-      def reopen(*) end
-      alias write <<
-    end
-    $stdout = @output
+    @quiet, Logging.quiet = Logging.quiet, true
   end
 
   def teardown
-    $stdout = STDOUT
+    Logging.quiet = @quiet
     Dir.chdir(@curdir)
     FileUtils.rm_rf(@tmpdir)
   end