diff --git a/python/ray/services.py b/python/ray/services.py
index 997de3256..9ce6a6e66 100644
--- a/python/ray/services.py
+++ b/python/ray/services.py
@@ -39,18 +39,6 @@ REDIS_MODULE = os.path.join(
     os.path.abspath(os.path.dirname(__file__)),
     "core/src/ray/gcs/redis_module/libray_redis_module.so")
 
-# Location of the credis server and modules.
-# credis will be enabled if the environment variable RAY_USE_NEW_GCS is set.
-CREDIS_EXECUTABLE = os.path.join(
-    os.path.abspath(os.path.dirname(__file__)),
-    "core/src/credis/redis/src/redis-server" + EXE_SUFFIX)
-CREDIS_MASTER_MODULE = os.path.join(
-    os.path.abspath(os.path.dirname(__file__)),
-    "core/src/credis/build/src/libmaster.so")
-CREDIS_MEMBER_MODULE = os.path.join(
-    os.path.abspath(os.path.dirname(__file__)),
-    "core/src/credis/build/src/libmember.so")
-
 # Location of the plasma object store executable.
 PLASMA_STORE_EXECUTABLE = os.path.join(
     os.path.abspath(os.path.dirname(__file__)),
@@ -663,7 +651,6 @@ def start_redis(node_ip_address,
                 redis_max_clients=None,
                 redirect_worker_output=False,
                 password=None,
-                use_credis=None,
                 fate_share=None):
     """Start the Redis global state store.
 
@@ -686,9 +673,6 @@ def start_redis(node_ip_address,
             to this value when they start up.
         password (str): Prevents external clients without the password
             from connecting to Redis if provided.
-        use_credis: If True, additionally load the chain-replicated libraries
-            into the redis servers.  Defaults to None, which means its value is
-            set by the presence of "RAY_USE_NEW_GCS" in os.environ.
 
     Returns:
         A tuple of the address for the primary Redis shard, a list of
@@ -708,31 +692,8 @@ def start_redis(node_ip_address,
 
     processes = []
 
-    if use_credis is None:
-        use_credis = ("RAY_USE_NEW_GCS" in os.environ)
-    if use_credis:
-        if password is not None:
-            # TODO(pschafhalter) remove this once credis supports
-            # authenticating Redis ports
-            raise ValueError("Setting the `redis_password` argument is not "
-                             "supported in credis. To run Ray with "
-                             "password-protected Redis ports, ensure that "
-                             "the environment variable `RAY_USE_NEW_GCS=off`.")
-        assert num_redis_shards == 1, (
-            "For now, RAY_USE_NEW_GCS supports 1 shard, and credis "
-            "supports 1-node chain for that shard only.")
-
-    if use_credis:
-        redis_executable = CREDIS_EXECUTABLE
-        # TODO(suquark): We need credis here because some symbols need to be
-        # imported from credis dynamically through dlopen when Ray is built
-        # with RAY_USE_NEW_GCS=on. We should remove them later for the primary
-        # shard.
-        # See src/ray/gcs/redis_module/ray_redis_module.cc
-        redis_modules = [CREDIS_MASTER_MODULE, REDIS_MODULE]
-    else:
-        redis_executable = REDIS_EXECUTABLE
-        redis_modules = [REDIS_MODULE]
+    redis_executable = REDIS_EXECUTABLE
+    redis_modules = [REDIS_MODULE]
 
     redis_stdout_file, redis_stderr_file = redirect_files[0]
     # Start the primary Redis shard.
@@ -777,15 +738,8 @@ def start_redis(node_ip_address,
     redis_shards = []
     for i in range(num_redis_shards):
         redis_stdout_file, redis_stderr_file = redirect_files[i + 1]
-        if use_credis:
-            redis_executable = CREDIS_EXECUTABLE
-            # It is important to load the credis module BEFORE the ray module,
-            # as the latter contains an extern declaration that the former
-            # supplies.
-            redis_modules = [CREDIS_MEMBER_MODULE, REDIS_MODULE]
-        else:
-            redis_executable = REDIS_EXECUTABLE
-            redis_modules = [REDIS_MODULE]
+        redis_executable = REDIS_EXECUTABLE
+        redis_modules = [REDIS_MODULE]
 
         redis_shard_port, p = _start_redis_instance(
             redis_executable,
@@ -804,40 +758,6 @@ def start_redis(node_ip_address,
         # Store redis shard information in the primary redis shard.
         primary_redis_client.rpush("RedisShards", shard_address)
 
-    if use_credis:
-        # Configure the chain state. The way it is intended to work is
-        # the following:
-        #
-        # PRIMARY_SHARD
-        #
-        # SHARD_1 (master replica) -> SHARD_1 (member replica)
-        #                                        -> SHARD_1 (member replica)
-        #
-        # SHARD_2 (master replica) -> SHARD_2 (member replica)
-        #                                        -> SHARD_2 (member replica)
-        # ...
-        #
-        #
-        # If we have credis members in future, their modules should be:
-        # [CREDIS_MEMBER_MODULE, REDIS_MODULE], and they will be initialized by
-        # execute_command("MEMBER.CONNECT_TO_MASTER", node_ip_address, port)
-        #
-        # Currently we have num_redis_shards == 1, so only one chain will be
-        # created, and the chain only contains master.
-
-        # TODO(suquark): Currently, this is not correct because we are
-        # using the master replica as the primary shard. This should be
-        # fixed later. I had tried to fix it but failed because of heartbeat
-        # issues.
-        primary_client = redis.StrictRedis(
-            host=node_ip_address, port=port, password=password)
-        shard_client = redis.StrictRedis(
-            host=node_ip_address, port=redis_shard_port, password=password)
-        primary_client.execute_command("MASTER.ADD", node_ip_address,
-                                       redis_shard_port)
-        shard_client.execute_command("MEMBER.CONNECT_TO_MASTER",
-                                     node_ip_address, port)
-
     return redis_address, redis_shards, processes
 
 
diff --git a/python/ray/tests/test_actor_advanced.py b/python/ray/tests/test_actor_advanced.py
index 0e018e3ab..cdffe6afa 100644
--- a/python/ray/tests/test_actor_advanced.py
+++ b/python/ray/tests/test_actor_advanced.py
@@ -189,9 +189,6 @@ def test_exception_raised_when_actor_node_dies(ray_start_cluster_head):
                 ray.get(x_id)
 
 
-@pytest.mark.skipif(
-    os.environ.get("RAY_USE_NEW_GCS") == "on",
-    reason="Hanging with new GCS API.")
 def test_actor_init_fails(ray_start_cluster_head):
     cluster = ray_start_cluster_head
     remote_node = cluster.add_node()
@@ -347,9 +344,6 @@ def test_distributed_handle(ray_start_cluster_2_nodes):
 
 
 @pytest.mark.skip("This test does not work yet.")
-@pytest.mark.skipif(
-    os.environ.get("RAY_USE_NEW_GCS") == "on",
-    reason="Hanging with new GCS API.")
 def test_remote_checkpoint_distributed_handle(ray_start_cluster_2_nodes):
     cluster = ray_start_cluster_2_nodes
     counter, ids = setup_counter_actor(test_checkpoint=True)
diff --git a/python/ray/tests/test_actor_resources.py b/python/ray/tests/test_actor_resources.py
index 66fb5fe09..f0c254c5f 100644
--- a/python/ray/tests/test_actor_resources.py
+++ b/python/ray/tests/test_actor_resources.py
@@ -79,9 +79,6 @@ def test_actor_class_methods(ray_start_regular):
     assert ray.get(a.g.remote(2)) == 4
 
 
-@pytest.mark.skipif(
-    os.environ.get("RAY_USE_NEW_GCS") == "on",
-    reason="Failing with new GCS API on Linux.")
 @pytest.mark.skipif(sys.platform == "win32", reason="Failing on Windows.")
 def test_actor_gpus(ray_start_cluster):
     cluster = ray_start_cluster
diff --git a/python/ray/tests/test_advanced_3.py b/python/ray/tests/test_advanced_3.py
index 982dd96aa..9eb0308d0 100644
--- a/python/ray/tests/test_advanced_3.py
+++ b/python/ray/tests/test_advanced_3.py
@@ -257,9 +257,6 @@ def test_not_logging_to_driver(shutdown_only):
     assert len(err_lines) == 0
 
 
-@pytest.mark.skipif(
-    os.environ.get("RAY_USE_NEW_GCS") == "on",
-    reason="New GCS API doesn't have a Python API yet.")
 def test_workers(shutdown_only):
     num_workers = 3
     ray.init(num_cpus=num_workers)
diff --git a/python/ray/tests/test_component_failures.py b/python/ray/tests/test_component_failures.py
index 601f12fa4..884f77edb 100644
--- a/python/ray/tests/test_component_failures.py
+++ b/python/ray/tests/test_component_failures.py
@@ -14,9 +14,6 @@ SIGKILL = signal.SIGKILL if sys.platform != "win32" else signal.SIGTERM
 
 # This test checks that when a worker dies in the middle of a get, the plasma
 # store and raylet will not die.
-@pytest.mark.skipif(
-    os.environ.get("RAY_USE_NEW_GCS") == "on",
-    reason="Not working with new GCS API.")
 def test_dying_worker_get(ray_start_2_cpus):
     @ray.remote
     def sleep_forever(signal):
@@ -65,9 +62,6 @@ def test_dying_worker_get(ray_start_2_cpus):
 
 # This test checks that when a driver dies in the middle of a get, the plasma
 # store and raylet will not die.
-@pytest.mark.skipif(
-    os.environ.get("RAY_USE_NEW_GCS") == "on",
-    reason="Not working with new GCS API.")
 def test_dying_driver_get(ray_start_regular):
     # Start the Ray processes.
     address_info = ray_start_regular
@@ -109,9 +103,6 @@ ray.get(ray.ObjectRef(ray.utils.hex_to_binary("{}")))
 
 # This test checks that when a worker dies in the middle of a wait, the plasma
 # store and raylet will not die.
-@pytest.mark.skipif(
-    os.environ.get("RAY_USE_NEW_GCS") == "on",
-    reason="Not working with new GCS API.")
 def test_dying_worker_wait(ray_start_2_cpus):
     @ray.remote
     def sleep_forever():
@@ -150,9 +141,6 @@ def test_dying_worker_wait(ray_start_2_cpus):
 
 # This test checks that when a driver dies in the middle of a wait, the plasma
 # store and raylet will not die.
-@pytest.mark.skipif(
-    os.environ.get("RAY_USE_NEW_GCS") == "on",
-    reason="Not working with new GCS API.")
 def test_dying_driver_wait(ray_start_regular):
     # Start the Ray processes.
     address_info = ray_start_regular
@@ -193,5 +181,4 @@ ray.wait([ray.ObjectRef(ray.utils.hex_to_binary("{}"))])
 
 
 if __name__ == "__main__":
-    import pytest
     sys.exit(pytest.main(["-v", __file__]))
diff --git a/python/ray/tests/test_component_failures_3.py b/python/ray/tests/test_component_failures_3.py
index b910f22d3..ae6c21fe4 100644
--- a/python/ray/tests/test_component_failures_3.py
+++ b/python/ray/tests/test_component_failures_3.py
@@ -1,4 +1,3 @@
-import os
 import sys
 import time
 
@@ -75,9 +74,6 @@ def test_actor_creation_node_failure(ray_start_cluster):
         cluster.remove_node(get_other_nodes(cluster, True)[-1])
 
 
-@pytest.mark.skipif(
-    os.environ.get("RAY_USE_NEW_GCS") == "on",
-    reason="Hanging with new GCS API.")
 def test_driver_lives_sequential(ray_start_regular):
     ray.worker._global_node.kill_raylet()
     ray.worker._global_node.kill_plasma_store()
@@ -88,9 +84,6 @@ def test_driver_lives_sequential(ray_start_regular):
     # If the driver can reach the tearDown method, then it is still alive.
 
 
-@pytest.mark.skipif(
-    os.environ.get("RAY_USE_NEW_GCS") == "on",
-    reason="Hanging with new GCS API.")
 def test_driver_lives_parallel(ray_start_regular):
     all_processes = ray.worker._global_node.all_processes
 
diff --git a/python/ray/tests/test_multi_node.py b/python/ray/tests/test_multi_node.py
index 4247e340f..7b168dc46 100644
--- a/python/ray/tests/test_multi_node.py
+++ b/python/ray/tests/test_multi_node.py
@@ -419,19 +419,18 @@ def test_calling_start_ray_head(call_ray_stop_only):
     check_call_ray(["start", "--head", "--redis-max-clients", "100"])
     check_call_ray(["stop"])
 
-    if "RAY_USE_NEW_GCS" not in os.environ:
-        # Test starting Ray with redis shard ports specified.
-        check_call_ray(
-            ["start", "--head", "--redis-shard-ports", "6380,6381,6382"])
-        check_call_ray(["stop"])
+    # Test starting Ray with redis shard ports specified.
+    check_call_ray(
+        ["start", "--head", "--redis-shard-ports", "6380,6381,6382"])
+    check_call_ray(["stop"])
 
-        # Test starting Ray with all arguments specified.
-        check_call_ray([
-            "start", "--head", "--redis-shard-ports", "6380,6381,6382",
-            "--object-manager-port", "12345", "--num-cpus", "2", "--num-gpus",
-            "0", "--redis-max-clients", "100", "--resources", "{\"Custom\": 1}"
-        ])
-        check_call_ray(["stop"])
+    # Test starting Ray with all arguments specified.
+    check_call_ray([
+        "start", "--head", "--redis-shard-ports", "6380,6381,6382",
+        "--object-manager-port", "12345", "--num-cpus", "2", "--num-gpus", "0",
+        "--redis-max-clients", "100", "--resources", "{\"Custom\": 1}"
+    ])
+    check_call_ray(["stop"])
 
     # Test starting Ray with invalid arguments.
     with pytest.raises(subprocess.CalledProcessError):
diff --git a/python/ray/tests/test_multinode_failures_2.py b/python/ray/tests/test_multinode_failures_2.py
index 6de892d36..be855306c 100644
--- a/python/ray/tests/test_multinode_failures_2.py
+++ b/python/ray/tests/test_multinode_failures_2.py
@@ -1,4 +1,3 @@
-import os
 import sys
 import time
 
@@ -124,9 +123,6 @@ def test_actor_creation_node_failure(ray_start_cluster):
         cluster.remove_node(get_other_nodes(cluster, True)[-1])
 
 
-@pytest.mark.skipif(
-    os.environ.get("RAY_USE_NEW_GCS") == "on",
-    reason="Hanging with new GCS API.")
 def test_driver_lives_sequential(ray_start_regular):
     ray.worker._global_node.kill_raylet()
     ray.worker._global_node.kill_plasma_store()
@@ -137,9 +133,6 @@ def test_driver_lives_sequential(ray_start_regular):
     # If the driver can reach the tearDown method, then it is still alive.
 
 
-@pytest.mark.skipif(
-    os.environ.get("RAY_USE_NEW_GCS") == "on",
-    reason="Hanging with new GCS API.")
 def test_driver_lives_parallel(ray_start_regular):
     all_processes = ray.worker._global_node.all_processes
 
diff --git a/python/ray/tests/test_ray_init.py b/python/ray/tests/test_ray_init.py
index 2b9b66f06..ad9f96ca2 100644
--- a/python/ray/tests/test_ray_init.py
+++ b/python/ray/tests/test_ray_init.py
@@ -15,9 +15,6 @@ def password():
 
 
 class TestRedisPassword:
-    @pytest.mark.skipif(
-        os.environ.get("RAY_USE_NEW_GCS") == "on",
-        reason="New GCS API doesn't support Redis authentication yet.")
     def test_redis_password(self, password, shutdown_only):
         @ray.remote
         def f():
@@ -42,9 +39,6 @@ class TestRedisPassword:
             host=redis_ip, port=redis_port, password=password)
         assert redis_client.ping()
 
-    @pytest.mark.skipif(
-        os.environ.get("RAY_USE_NEW_GCS") == "on",
-        reason="New GCS API doesn't support Redis authentication yet.")
     def test_redis_password_cluster(self, password, shutdown_only):
         @ray.remote
         def f():
diff --git a/python/setup.py b/python/setup.py
index 89cede854..75f1945bc 100644
--- a/python/setup.py
+++ b/python/setup.py
@@ -98,13 +98,6 @@ optional_ray_files += ray_autoscaler_files
 optional_ray_files += ray_project_files
 optional_ray_files += ray_dashboard_files
 
-if os.getenv("RAY_USE_NEW_GCS") == "on":
-    ray_files += [
-        "ray/core/src/credis/build/src/libmember.so",
-        "ray/core/src/credis/build/src/libmaster.so",
-        "ray/core/src/credis/redis/src/redis-server" + exe_suffix,
-    ]
-
 # If you're adding dependencies for ray extras, please
 # also update the matching section of requirements.txt
 # in this directory
diff --git a/src/ray/gcs/redis_module/chain_module.h b/src/ray/gcs/redis_module/chain_module.h
deleted file mode 100644
index 574d2325e..000000000
--- a/src/ray/gcs/redis_module/chain_module.h
+++ /dev/null
@@ -1,73 +0,0 @@
-// Copyright 2017 The Ray Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//  http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#pragma once
-
-#include <functional>
-
-#include "ray/gcs/redis_module/redismodule.h"
-
-// NOTE(zongheng): this duplicated declaration serves as forward-declaration
-// only.  The implementation is supposed to be linked in from credis.  In
-// principle, we can expose a header from credis and simple include that header.
-// This is left as future work.
-//
-// Concrete definitions from credis (from an example commit):
-// https://github.com/ray-project/credis/blob/7eae7f2e58d16dfa1a95b5dfab02549f54b94e5d/src/member.cc#L41
-// https://github.com/ray-project/credis/blob/7eae7f2e58d16dfa1a95b5dfab02549f54b94e5d/src/master.cc#L36
-
-// Typical usage to make an existing redismodule command chain-compatible:
-//
-//   extern RedisChainModule module;
-//   int MyCmd_RedisModuleCmd(...) {
-//       return module.Mutate(..., NodeFunc, TailFunc);
-//   }
-//
-// See, for instance, ChainTableAdd_RedisCommand in ray_redis_module.cc.
-class RedisChainModule {
- public:
-  // A function that runs on every node in the chain.  Type:
-  //   (context, argv, argc, (can be nullptr) mutated_key_str) -> int
-  //
-  // (Advanced) The optional fourth arg can be used in the following way:
-  //
-  //     RedisModuleString* redis_key_str = nullptr;
-  //     node_func(ctx, argv, argc, &redis_key_str);
-  //     // "redis_key_str" now points to the RedisModuleString whose contents
-  //     // is mutated by "node_func".
-  //
-  // If the fourth arg is passed, NodeFunc *must* fill in the key being mutated.
-  // It is okay for this NodeFunc to call "RM_FreeString(mutated_key_str)" after
-  // assigning the fourth arg, since that call presumably only decrements a ref
-  // count.
-  using NodeFunc = std::function<int(RedisModuleCtx *, RedisModuleString **, int,
-                                     RedisModuleString **)>;
-
-  // A function that (1) runs only after all NodeFunc's have run, and (2) runs
-  // once on the tail.  A typical usage is to publish a write.
-  using TailFunc = std::function<int(RedisModuleCtx *, RedisModuleString **, int)>;
-
-  // TODO(zongheng): document the RM_Reply semantics.
-
-  // Runs "node_func" on every node in the chain; after the tail node has run it
-  // too, finalizes the mutation by running "tail_func".
-  //
-  // If node_func() returns non-zero, it is treated as an error and the entire
-  // update will terminate early, without running subsequent node_func() and the
-  // final tail_func().
-  //
-  // TODO(zongheng): currently only supports 1-node chain.
-  int ChainReplicate(RedisModuleCtx *ctx, RedisModuleString **argv, int argc,
-                     NodeFunc node_func, TailFunc tail_func);
-};
diff --git a/src/ray/gcs/redis_module/ray_redis_module.cc b/src/ray/gcs/redis_module/ray_redis_module.cc
index 755732cf6..c62ce59c6 100644
--- a/src/ray/gcs/redis_module/ray_redis_module.cc
+++ b/src/ray/gcs/redis_module/ray_redis_module.cc
@@ -30,19 +30,6 @@ using ray::rpc::GcsEntry;
 using ray::rpc::TablePrefix;
 using ray::rpc::TablePubsub;
 
-#if RAY_USE_NEW_GCS
-// Under this flag, ray-project/credis will be loaded.  Specifically, via
-// "path/redis-server --loadmodule <credis module> --loadmodule <current
-// libray_redis_module>" (dlopen() under the hood) will a definition of "module"
-// be supplied.
-//
-// All commands in this file that depend on "module" must be wrapped by "#if
-// RAY_USE_NEW_GCS", until we switch to this launch configuration as the
-// default.
-#include "ray/gcs/redis_module/chain_module.h"
-extern RedisChainModule module;
-#endif
-
 #define REPLY_AND_RETURN_IF_FALSE(CONDITION, MESSAGE) \
   if (!(CONDITION)) {                                 \
     RedisModule_ReplyWithError(ctx, (MESSAGE));       \
@@ -328,13 +315,6 @@ int TableAdd_RedisCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int arg
   return TableAdd_DoPublish(ctx, argv, argc);
 }
 
-#if RAY_USE_NEW_GCS
-int ChainTableAdd_RedisCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
-  return module.ChainReplicate(ctx, argv, argc, /*node_func=*/TableAdd_DoWrite,
-                               /*tail_func=*/TableAdd_DoPublish);
-}
-#endif
-
 int TableAppend_DoWrite(RedisModuleCtx *ctx, RedisModuleString **argv, int argc,
                         RedisModuleString **mutated_key_str) {
   if (argc < 5 || argc > 6) {
@@ -435,15 +415,6 @@ int TableAppend_RedisCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int
   return TableAppend_DoPublish(ctx, argv, argc);
 }
 
-#if RAY_USE_NEW_GCS
-int ChainTableAppend_RedisCommand(RedisModuleCtx *ctx, RedisModuleString **argv,
-                                  int argc) {
-  return module.ChainReplicate(ctx, argv, argc,
-                               /*node_func=*/TableAppend_DoWrite,
-                               /*tail_func=*/TableAppend_DoPublish);
-}
-#endif
-
 int Set_DoPublish(RedisModuleCtx *ctx, RedisModuleString **argv, bool is_add) {
   RedisModuleString *pubsub_channel_str = argv[2];
   RedisModuleString *id = argv[3];
@@ -983,10 +954,6 @@ AUTO_MEMORY(TableRequestNotifications_RedisCommand);
 AUTO_MEMORY(TableDelete_RedisCommand);
 AUTO_MEMORY(TableCancelNotifications_RedisCommand);
 AUTO_MEMORY(DebugString_RedisCommand);
-#if RAY_USE_NEW_GCS
-AUTO_MEMORY(ChainTableAdd_RedisCommand);
-AUTO_MEMORY(ChainTableAppend_RedisCommand);
-#endif
 
 extern "C" {
 
@@ -1055,19 +1022,6 @@ __declspec(dllexport)
     return REDISMODULE_ERR;
   }
 
-#if RAY_USE_NEW_GCS
-  // Chain-enabled commands that depend on ray-project/credis.
-  if (RedisModule_CreateCommand(ctx, "ray.chain.table_add", ChainTableAdd_RedisCommand,
-                                "write pubsub", 0, 0, 0) == REDISMODULE_ERR) {
-    return REDISMODULE_ERR;
-  }
-  if (RedisModule_CreateCommand(ctx, "ray.chain.table_append",
-                                ChainTableAppend_RedisCommand, "write pubsub", 0, 0,
-                                0) == REDISMODULE_ERR) {
-    return REDISMODULE_ERR;
-  }
-#endif
-
   return REDISMODULE_OK;
 }