diff --git a/src/python/grpcio_tests/commands.py b/src/python/grpcio_tests/commands.py
index 866fb6de1f7..e6e5e3d4e93 100644
--- a/src/python/grpcio_tests/commands.py
+++ b/src/python/grpcio_tests/commands.py
@@ -147,7 +147,9 @@ class TestGevent(setuptools.Command):
         # TODO(https://github.com/grpc/grpc/issues/17330) enable these three tests
         'channelz._channelz_servicer_test.ChannelzServicerTest.test_many_subchannels',
         'channelz._channelz_servicer_test.ChannelzServicerTest.test_many_subchannels_and_sockets',
-        'channelz._channelz_servicer_test.ChannelzServicerTest.test_streaming_rpc'
+        'channelz._channelz_servicer_test.ChannelzServicerTest.test_streaming_rpc',
+        # TODO(https://github.com/grpc/grpc/issues/15411) enable this test
+        'unit._cython._channel_test.ChannelTest.test_negative_deadline_connectivity'
     )
     description = 'run tests with gevent.  Assumes grpc/gevent are installed'
     user_options = []