diff --git a/release/nightly_tests/many_nodes_tests/app_config.yaml b/release/nightly_tests/many_nodes_tests/app_config.yaml
index 803f65d85..85835cf6c 100644
--- a/release/nightly_tests/many_nodes_tests/app_config.yaml
+++ b/release/nightly_tests/many_nodes_tests/app_config.yaml
@@ -1,5 +1,4 @@
 base_image: {{ env["RAY_IMAGE_NIGHTLY_CPU"] | default("anyscale/ray:nightly-py37") }}
-env_vars: {"RAY_gcs_server_rpc_server_thread_num": "8"}
 debian_packages: []
 
 python: