Fix filter_latency test for sockpair and fd fixtures.
diff --git a/test/core/end2end/tests/filter_latency.c b/test/core/end2end/tests/filter_latency.c
index 8bcb313..2c9a052 100644
--- a/test/core/end2end/tests/filter_latency.c
+++ b/test/core/end2end/tests/filter_latency.c
@@ -325,6 +325,9 @@
grpc_channel_init_register_stage(GRPC_CLIENT_CHANNEL, INT_MAX,
maybe_add_filter,
(void *)&test_client_filter);
+ grpc_channel_init_register_stage(GRPC_CLIENT_DIRECT_CHANNEL, INT_MAX,
+ maybe_add_filter,
+ (void *)&test_client_filter);
grpc_channel_init_register_stage(GRPC_SERVER_CHANNEL, INT_MAX,
maybe_add_filter,
(void *)&test_server_filter);