[oberstet@txbuild ~/twisted/ipv6-connectTCP-5085-2]$ trial -r kqueue --rterrors twisted.internet.test.test_tcp.WriteSequenceTests_KQueueReactor
twisted.internet.test.test_tcp
  WriteSequenceTests_KQueueReactor
    test_nonStreamingProducer ...                                          [OK]
    test_streamingProducer ...                                             [OK]
    test_withoutWrite ...                                                  [OK]
    test_writeSequenceWithUnicodeRaisesException ...                       [OK]

-------------------------------------------------------------------------------
Ran 4 tests in 0.082s

PASSED (successes=4)
[oberstet@txbuild ~/twisted/ipv6-connectTCP-5085-2]$ svn diff twisted/internet/test/test_tcp.py
Index: twisted/internet/test/test_tcp.py
===================================================================
--- twisted/internet/test/test_tcp.py   (revision 33863)
+++ twisted/internet/test/test_tcp.py   (working copy)
@@ -1136,7 +1136,7 @@
         self.addCleanup(port.stopListening)

         connector = reactor.connectTCP(
-            "127.0.0.1", port.getHost().port, client)
+            "localhost", port.getHost().port, client)
         self.addCleanup(connector.disconnect)

         def dataReceived(data):
@@ -1176,7 +1176,7 @@
         self.addCleanup(port.stopListening)

         connector = reactor.connectTCP(
-            "127.0.0.1", port.getHost().port, client)
+            "localhost", port.getHost().port, client)
         self.addCleanup(connector.disconnect)

         def serverConnected(proto):
@@ -1209,7 +1209,7 @@
         self.addCleanup(port.stopListening)

         connector = reactor.connectTCP(
-            "127.0.0.1", port.getHost().port, self.client)
+            "localhost", port.getHost().port, self.client)
         self.addCleanup(connector.disconnect)

         # The following could probably all be much simpler, but for #5285.
[oberstet@txbuild ~/twisted/ipv6-connectTCP-5085-2]$