1 files changed, 9 insertions, 0 deletions
diff --git a/test/socket/test_udp.rb b/test/socket/test_udp.rb
index d515ad4dbb..4893a1f3ca 100644
--- a/test/socket/test_udp.rb
+++ b/test/socket/test_udp.rb
@@ -6,6 +6,15 @@ end
 
 
 class TestUDPSocket < Test::Unit::TestCase
+  def test_open
+    assert_nothing_raised { UDPSocket.open {} }
+    assert_nothing_raised { UDPSocket.open(Socket::AF_INET) {} }
+    assert_nothing_raised { UDPSocket.open("AF_INET") {} }
+    if defined? Socket::AF_INET6
+      assert_nothing_raised { UDPSocket.open(Socket::AF_INET6) {} }
+    end
+  end
+
   def test_connect
     s = UDPSocket.new
     host = Object.new