Another test to skip.

CHANGES.rst

@@ -9,6 +9,9 @@
 
 - Update the bundled libuv from 1.20.1 to 1.22.0.
 
+- Test Python 3.7 on Appveyor. Fix the handling of Popen's
+  ``close_fds`` argument on 3.7.
+
 - Update Python versions tested on Travis, including PyPy to 6.0. See :issue:`1195`.
 
 - :mod:`gevent.queue` imports ``_PySimpleQueue`` instead of

src/greentest/greentest/patched_tests_setup.py

@@ -990,6 +990,8 @@ if PY37:
             # 1 threads after 60.0 seconds (count: 3, old count: 2)". reason is
             # unknown.
             'test_socket.BasicTCPTest.testRecvFrom',
+            # Ditto.
+            'test_socket.BasicTCPTest2.testDetach',
         ]
 
 # if 'signalfd' in os.environ.get('GEVENT_BACKEND', ''):