Use libuv as fallback from libev cffi

src/gevent/core.py

@@ -19,8 +19,10 @@ except ImportError:
     if lib == 'libuv':
         from gevent.libuv import loop as _core
     else:
-        from gevent.libev import corecffi as _core
-
+        try:
+            from gevent.libev import corecffi as _core
+        except ImportError:
+            from gevent.libuv import loop as _core
 
 copy_globals(_core, globals())
 

src/greentest/test__socket_close.py

@@ -17,7 +17,7 @@ class Test(greentest.TestCase):
     error_fatal = False
 
     def setUp(self):
-        self.server = server.StreamServer((greentest.DEFAULT_BIND_ADDR, 0), readall)
+        self.server = server.StreamServer(('127.0.0.1', 0), readall)
         self.server.start()
 
     def tearDown(self):
@@ -25,7 +25,7 @@ class Test(greentest.TestCase):
 
     def test_recv_closed(self):
         sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
-        sock.connect((greentest.DEFAULT_LOCAL_HOST_ADDR, self.server.server_port))
+        sock.connect(('localhost', self.server.server_port))
         receiver = gevent.spawn(sock.recv, 25)
         try:
             gevent.sleep(0.001)
@@ -40,7 +40,7 @@ class Test(greentest.TestCase):
 
     def test_recv_twice(self):
         sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
-        sock.connect((greentest.DEFAULT_LOCAL_HOST_ADDR, self.server.server_port))
+        sock.connect(('localhost', self.server.server_port))
         receiver = gevent.spawn(sock.recv, 25)
         try:
             gevent.sleep(0.001)