diff --git a/include/rest_rpc/asio_util.hpp b/include/rest_rpc/asio_util.hpp
index 393e906..de5fc6b 100644
--- a/include/rest_rpc/asio_util.hpp
+++ b/include/rest_rpc/asio_util.hpp
@@ -1,4 +1,5 @@
 #pragma once
+#include "io_context_pool.hpp"
 #include "traits.h"
 #include "use_asio.hpp"
 
@@ -29,6 +30,18 @@ template <typename Coro> inline auto sync_wait(auto executor, Coro &&coro) {
   return async_future(executor, std::forward<Coro>(coro)).get();
 }
 
+template <typename Coro> inline auto async_start(Coro &&coro) {
+  async_start(get_global_executor(), std::forward<Coro>(coro));
+}
+
+template <typename Coro> inline auto async_future(Coro &&coro) {
+  return async_future(get_global_executor(), std::forward<Coro>(coro));
+}
+
+template <typename Coro> inline auto sync_wait(Coro &&coro) {
+  return sync_wait(get_global_executor(), std::forward<Coro>(coro));
+}
+
 inline auto async_start(auto executor, auto &&coro, auto callback) {
   using R = typename std::remove_cvref_t<decltype(coro)>::value_type;
   if constexpr (std::is_void_v<R>) {
diff --git a/tests/test_rest_rpc.cpp b/tests/test_rest_rpc.cpp
index 92f57f3..120ae01 100644
--- a/tests/test_rest_rpc.cpp
+++ b/tests/test_rest_rpc.cpp
@@ -94,7 +94,7 @@ asio::awaitable<std::string> delay_response2(std::string_view str) {
     REST_LOG_INFO << ret.message();
     CHECK(ret);
   };
-  sync_wait(get_global_executor(), coro());
+  sync_wait(coro());
 
   rpc_context ctx; // right, created in io thread.
   co_await ctx.response(str);
@@ -244,7 +244,7 @@ asio::awaitable<void> test_router() {
   CHECK(result1.ec == rpc_errc::ok);
 }
 
-TEST_CASE("test router") { sync_wait(get_global_executor(), test_router()); }
+TEST_CASE("test router") { sync_wait(test_router()); }
 
 asio::awaitable<void>
 get_last_rwtime_coro(std::shared_ptr<rpc_connection> conn) {