diff --git a/plugin/federated/federated_comm.cc b/plugin/federated/federated_comm.cc
index ec1287413..578c25bdb 100644
--- a/plugin/federated/federated_comm.cc
+++ b/plugin/federated/federated_comm.cc
@@ -53,8 +53,8 @@ void FederatedComm::Init(std::string const& host, std::int32_t port, std::int32_
       args.SetMaxReceiveMessageSize(std::numeric_limits<std::int32_t>::max());
       auto channel = grpc::CreateCustomChannel(host + ":" + std::to_string(port),
                                                grpc::SslCredentials(options), args);
-      channel->WaitForConnected(
-          gpr_time_add(gpr_now(GPR_CLOCK_REALTIME), gpr_time_from_seconds(60, GPR_TIMESPAN)));
+      channel->WaitForConnected(gpr_time_add(
+          gpr_now(GPR_CLOCK_REALTIME), gpr_time_from_seconds(DefaultTimeoutSec(), GPR_TIMESPAN)));
       return federated::Federated::NewStub(channel);
     }();
   }
@@ -90,8 +90,6 @@ FederatedComm::FederatedComm(std::int32_t retry, std::chrono::seconds timeout, s
   auto parsed = common::Split(server_address, ':');
   CHECK_EQ(parsed.size(), 2) << "Invalid server address:" << server_address;
 
-  CHECK_NE(rank, -1) << "Parameter `federated_rank` is required";
-  CHECK_NE(world_size, 0) << "Parameter `federated_world_size` is required.";
   CHECK(!server_address.empty()) << "Parameter `federated_server_address` is required.";
 
   /**
diff --git a/plugin/federated/federated_comm.h b/plugin/federated/federated_comm.h
index b39e1878a..0909509e0 100644
--- a/plugin/federated/federated_comm.h
+++ b/plugin/federated/federated_comm.h
@@ -6,8 +6,9 @@
 #include <federated.grpc.pb.h>
 #include <federated.pb.h>
 
+#include <chrono>   // for seconds
 #include <cstdint>  // for int32_t
-#include <memory>   // for unique_ptr
+#include <memory>   // for shared_ptr
 #include <string>   // for string
 
 #include "../../src/collective/comm.h"    // for HostComm
@@ -46,10 +47,6 @@ class FederatedComm : public HostComm {
    */
   explicit FederatedComm(std::int32_t retry, std::chrono::seconds timeout, std::string task_id,
                          Json const& config);
-  explicit FederatedComm(std::string const& host, std::int32_t port, std::int32_t world,
-                         std::int32_t rank) {
-    this->Init(host, port, world, rank, {}, {}, {});
-  }
   [[nodiscard]] Result Shutdown() final {
     this->ResetState();
     return Success();
diff --git a/tests/cpp/plugin/federated/test_federated_comm.cc b/tests/cpp/plugin/federated/test_federated_comm.cc
index 16edc685f..a82e9c2c4 100644
--- a/tests/cpp/plugin/federated/test_federated_comm.cc
+++ b/tests/cpp/plugin/federated/test_federated_comm.cc
@@ -16,21 +16,35 @@
 namespace xgboost::collective {
 namespace {
 class FederatedCommTest : public SocketTest {};
+auto MakeConfig(std::string host, std::int32_t port, std::int32_t world, std::int32_t rank) {
+  Json config{Object{}};
+  config["federated_server_address"] = host + ":" + std::to_string(port);
+  config["federated_world_size"] = Integer{world};
+  config["federated_rank"] = Integer{rank};
+  return config;
+}
 }  // namespace
 
 TEST_F(FederatedCommTest, ThrowOnWorldSizeTooSmall) {
-  auto construct = [] { FederatedComm comm{"localhost", 0, 0, 0}; };
+  auto config = MakeConfig("localhost", 0, 0, 0);
+  auto construct = [config] {
+    FederatedComm comm{DefaultRetry(), std::chrono::seconds{DefaultTimeoutSec()}, "", config};
+  };
   ASSERT_THAT(construct, GMockThrow("Invalid world size"));
 }
 
 TEST_F(FederatedCommTest, ThrowOnRankTooSmall) {
-  auto construct = [] { FederatedComm comm{"localhost", 0, 1, -1}; };
+  auto config = MakeConfig("localhost", 0, 1, -1);
+  auto construct = [config] {
+    FederatedComm comm{DefaultRetry(), std::chrono::seconds{DefaultTimeoutSec()}, "", config};
+  };
   ASSERT_THAT(construct, GMockThrow("Invalid worker rank."));
 }
 
 TEST_F(FederatedCommTest, ThrowOnRankTooBig) {
-  auto construct = [] {
-    FederatedComm comm{"localhost", 0, 1, 1};
+  auto config = MakeConfig("localhost", 0, 1, 1);
+  auto construct = [config] {
+    FederatedComm comm{DefaultRetry(), std::chrono::seconds{DefaultTimeoutSec()}, "", config};
   };
   ASSERT_THAT(construct, GMockThrow("Invalid worker rank."));
 }
@@ -68,7 +82,8 @@ TEST_F(FederatedCommTest, GetWorldSizeAndRank) {
 }
 
 TEST_F(FederatedCommTest, IsDistributed) {
-  FederatedComm comm{"localhost", 0, 2, 1};
+  FederatedComm comm{DefaultRetry(), std::chrono::seconds{DefaultTimeoutSec()}, "",
+                     MakeConfig("localhost", 0, 2, 1)};
   EXPECT_TRUE(comm.IsDistributed());
 }