diff --git a/include/swoole_coroutine.h b/include/swoole_coroutine.h
index ff19aff2ad..4f45e9988b 100644
--- a/include/swoole_coroutine.h
+++ b/include/swoole_coroutine.h
@@ -153,7 +153,7 @@ class Coroutine {
 #ifdef SW_USE_THREAD_CONTEXT
         try {
             return (new Coroutine(fn, args))->run();
-        } catch (const std::system_error &e) {
+        } catch (const std::system_error& e) {
             swoole_set_last_error(e.code().value());
             swoole_warning("failed to create coroutine, Error: %s[%d]", e.what(), swoole_get_last_error());
             return -1;
diff --git a/src/os/async_thread.cc b/src/os/async_thread.cc
index 8fca0974b9..7b1bdd8f45 100644
--- a/src/os/async_thread.cc
+++ b/src/os/async_thread.cc
@@ -319,7 +319,7 @@ void ThreadPool::create_thread(const bool is_core_worker) {
     try {
         std::thread *_thread = new std::thread([this, is_core_worker]() { main_func(is_core_worker); });
         threads[_thread->get_id()] = _thread;
-    } catch (const std::system_error &e) {
+    } catch (const std::system_error& e) {
         swoole_sys_notice("create aio thread failed, please check your system configuration or adjust aio_worker_num");
         return;
     }
diff --git a/tests/swoole_thread/map2array.phpt b/tests/swoole_thread/map2array.phpt
index 6682d65986..0f1949ce41 100644
--- a/tests/swoole_thread/map2array.phpt
+++ b/tests/swoole_thread/map2array.phpt
@@ -12,7 +12,7 @@ use Swoole\Thread\Map;
 
 require __DIR__ . '/../include/bootstrap.php';
 
-$LURDATE = new Map;
+$LURDATE = new Map();
 $time = 'abc';
 $LURDATE[$time] = new Map(["saaa" => 1111]);
 $ls = $LURDATE[$time]->toArray();