diff --git a/test/zlib/test_zlib.rb b/test/zlib/test_zlib.rb
index b148553be6..b642fabc8e 100644
--- a/test/zlib/test_zlib.rb
+++ b/test/zlib/test_zlib.rb
@@ -5,12 +5,6 @@ require 'zlib'
 
 class TestZlibGzipWriter < Test::Unit::TestCase
   def test_new_nil # [ruby-dev:23228]
-    old = $VERBOSE
-    $VERBOSE = nil
-    begin
-      assert_raises(NoMethodError) { Zlib::GzipWriter.new(nil).close }
-    ensure
-      $VERBOSE = old
-    end
+    assert_raises(NoMethodError) { Zlib::GzipWriter.new(nil).close }
   end
 end