:tableflip:

src/python/grpcio_tests/commands.py

@@ -227,7 +227,10 @@ class TestGevent(setuptools.Command):
     )
     BANNED_WINDOWS_TESTS = (
         # TODO(https://github.com/grpc/grpc/pull/15411) enable this test
-        'unit._dns_resolver_test.DNSResolverTest.test_connect_loopback',)
+        'unit._dns_resolver_test.DNSResolverTest.test_connect_loopback',
+        # TODO(https://github.com/grpc/grpc/issues/22257)
+        'unit._contextvars_propagation_test.ContextVarsPropagationTest',
+    )
     description = 'run tests with gevent.  Assumes grpc/gevent are installed'
     user_options = []
 

src/python/grpcio_tests/tests/unit/_contextvars_propagation_test.py

@@ -103,10 +103,7 @@ class ContextVarsPropagationTest(unittest.TestCase):
     def test_propagation_to_auth_plugin(self):
         set_up_expected_context()
         with _server() as port:
-            # NOTE(rbellevi): We use a literal IPV6 address because 'localhost'
+            target = "localhost:{}".format(port)
-            # is not recognized as a local address by the LocalCredentials
-            # implementation on Windows.
-            target = "[::1]:{}".format(port)
             local_credentials = grpc.local_channel_credentials()
             test_call_credentials = TestCallCredentials()
             call_credentials = grpc.metadata_call_credentials(