1 files changed, 6 insertions, 1 deletions
diff --git a/test/zlib/test_zlib.rb b/test/zlib/test_zlib.rb
index 4832bcf540..493bdab118 100644
--- a/test/zlib/test_zlib.rb
+++ b/test/zlib/test_zlib.rb
@@ -8,8 +8,13 @@ end
 
 if defined? Zlib
   class TestZlibGzipWriter < Test::Unit::TestCase
-    def test_new_nil # [ruby-dev:23228]
+    def test_invalid_new
+      # [ruby-dev:23228]
       assert_raises(NoMethodError) { Zlib::GzipWriter.new(nil).close }
+      # [ruby-dev:23344]
+      assert_raises(NoMethodError) { Zlib::GzipWriter.new(true).close }
+      assert_raises(NoMethodError) { Zlib::GzipWriter.new(0).close }
+      assert_raises(NoMethodError) { Zlib::GzipWriter.new(:hoge).close }
     end
   end
 end