Index: Twisted-19.7.0/src/twisted/test/test_udp.py
===================================================================
--- Twisted-19.7.0.orig/src/twisted/test/test_udp.py
+++ Twisted-19.7.0/src/twisted/test/test_udp.py
@@ -514,6 +514,7 @@ class MulticastTests(unittest.TestCase):
         skip = "Does not work on Azure Pipelines"
 
     def setUp(self):
+        raise unittest.SkipTest("Multicast networking doesn't work with OBS")
         self.server = Server()
         self.client = Client()
         # multicast won't work if we listen over loopback, apparently