https://github.com/gevent/gevent/issues/1951

--- gevent-24.2.1/src/gevent/tests/test__close_backend_fd.py.orig
+++ gevent-24.2.1/src/gevent/tests/test__close_backend_fd.py
@@ -26,6 +26,7 @@
         'epoll',
         'linux_aio',
         'linux_iouring',
+        'port',
     )
 
     BACKENDS_THAT_WILL_FAIL_TO_CREATE_AT_RUNTIME = (