diff -r f7643c893587 Lib/test/support/__init__.py
--- a/Lib/test/support/__init__.py	Wed Jul 23 19:28:13 2014 +0100
+++ b/Lib/test/support/__init__.py	Wed Jul 23 21:11:16 2014 +0100
@@ -90,6 +90,7 @@
     "is_jython", "check_impl_detail",
     # network
     "HOST", "IPV6_ENABLED", "find_unused_port", "bind_port", "open_urlresource",
+    "socketpair",
     # processes
     'temp_umask', "reap_children",
     # logging
@@ -674,6 +675,31 @@
     port = sock.getsockname()[1]
     return port
 
+if hasattr(socket, 'socketpair'):
+    socketpair = socket.socketpair
+else:
+    def socketpair(family=socket.AF_INET, type=socket.SOCK_STREAM, proto=0):
+        """Ad-hoc socketpair implementation."""
+        if family != socket.AF_INET:
+            raise ValueError("Invalid family: {!r}".format(family))
+
+        with socket.socket(family, type, proto) as server:
+            server.bind((HOST, 0))
+            server.listen()
+            client = socket.socket(family, type, proto)
+            try:
+                client.connect(server.getsockname())
+                client_addr = client.getsockname()
+                while True:
+                    remote, remote_addr = server.accept()
+                    # check that we've got the correct client
+                    if remote_addr == client_addr:
+                        return client, remote
+                    remote.close()
+            except:
+                client.close()
+                raise
+ 
 def _is_ipv6_enabled():
     """Check whether IPv6 is enabled on this host."""
     if socket.has_ipv6:
diff -r f7643c893587 Lib/test/test_support.py
--- a/Lib/test/test_support.py	Wed Jul 23 19:28:13 2014 +0100
+++ b/Lib/test/test_support.py	Wed Jul 23 21:11:16 2014 +0100
@@ -87,6 +87,17 @@
         s.listen()
         s.close()
 
+    def test_socketpair(self):
+        c, s = support.socketpair()
+        self.addCleanup(c.close)
+        self.addCleanup(s.close)
+        c.send(b'x')
+        self.assertEqual(b'x', s.recv(1024))
+        s.send(b'y')
+        self.assertEqual(b'y', c.recv(1024))
+        c.close()
+        self.assertFalse(s.recv(1024))
+
     # Tests for temp_dir()
 
     def test_temp_dir(self):