Issue #7547: fix transient failures due to network glitches in test_timeout.

Patch by Sandro Tosi.

Lib/test/test_timeout.py

@@ -130,11 +130,13 @@ class TimeoutTestCase(unittest.TestCase):
     def testRecvTimeout(self):
         # Test recv() timeout
         _timeout = 0.02
+
+        with support.transient_internet(self.addr_remote[0]):
             self.sock.connect(self.addr_remote)
             self.sock.settimeout(_timeout)
 
             _t1 = time.time()
-        self.assertRaises(socket.error, self.sock.recv, 1024)
+            self.assertRaises(socket.timeout, self.sock.recv, 1024)
             _t2 = time.time()
 
             _delta = abs(_t1 - _t2)