Missed an import.

src/gevent/subprocess.py

@@ -976,6 +976,7 @@ class Popen(object):
 
                     if handle_list:
                         if not close_fds:
+                            import warnings
                             warnings.warn("startupinfo.lpAttributeList['handle_list'] "
                                           "overriding close_fds", RuntimeWarning)
 

src/greentest/greentest/patched_tests_setup.py

@@ -992,6 +992,7 @@ if PY37:
             'test_socket.BasicTCPTest.testRecvFrom',
             # Ditto.
             'test_socket.BasicTCPTest2.testDetach',
+            'test_socket.BasicTCPTest2.testFromFd',
             'test_socket.BasicTCPTest.testRecv',
         ]