diff --git a/.github/workflows/core.yml b/.github/workflows/core.yml
index 6946f03f14..1c228f05ab 100644
--- a/.github/workflows/core.yml
+++ b/.github/workflows/core.yml
@@ -9,11 +9,18 @@ jobs:
   build:
     runs-on: ubuntu-latest
     if: "!contains(github.event.head_commit.message, '--filter=') || contains(github.event.head_commit.message, '[core]')"
+    timeout-minutes: 10
     services:
       tinyproxy:
         image: "vimagick/tinyproxy"
         ports:
           - 8888:8888
+      nginx:
+        image: "nginx"
+        ports:
+          - "80:80"
+        env:
+          NGINX_PORT: "[::]:80"
       socks5:
         image: "xkuma/socks5"
         ports:
diff --git a/core-tests/src/coroutine/socket.cpp b/core-tests/src/coroutine/socket.cpp
index a66f18780e..e4787c7cd5 100644
--- a/core-tests/src/coroutine/socket.cpp
+++ b/core-tests/src/coroutine/socket.cpp
@@ -32,9 +32,9 @@ using swoole::coroutine::Socket;
 using swoole::coroutine::System;
 using swoole::network::Address;
 using swoole::network::IOVector;
-using swoole::test::Server;
 using swoole::test::create_http_proxy;
 using swoole::test::create_socks5_proxy;
+using swoole::test::Server;
 
 const std::string host = "www.baidu.com";
 
@@ -66,6 +66,24 @@ TEST(coroutine_socket, connect_with_dns) {
     });
 }
 
+TEST(coroutine_socket, tcp6) {
+    coroutine::run([](void *arg) {
+        Socket sock(SW_SOCK_TCP6);
+        bool retval = sock.connect("::1", 80);
+        ASSERT_EQ(retval, true);
+        ASSERT_EQ(sock.errCode, 0);
+    });
+}
+
+TEST(coroutine_socket, unixsock_fail) {
+    coroutine::run([](void *arg) {
+        Socket sock(SW_SOCK_UNIX_STREAM);
+        bool retval = sock.connect("/tmp/unix.sock");
+        ASSERT_EQ(retval, false);
+        ASSERT_EQ(sock.errCode, ENOENT);
+    });
+}
+
 TEST(coroutine_socket, recv_success) {
     pid_t pid;
     int port = swoole::test::get_random_port();
@@ -1028,7 +1046,6 @@ TEST(coroutine_socket, https_get_with_http_proxy) {
     });
 }
 
-
 #ifdef SW_USE_OPENSSL
 TEST(coroutine_socket, ssl) {
     coroutine::run([&](void *arg) {
diff --git a/core-tests/src/os/process_pool.cpp b/core-tests/src/os/process_pool.cpp
index 607b3a714b..5f043f7a43 100644
--- a/core-tests/src/os/process_pool.cpp
+++ b/core-tests/src/os/process_pool.cpp
@@ -7,6 +7,8 @@
 #define sysv_signal signal
 #endif
 
+#include "swoole_signal.h"
+
 using namespace swoole;
 
 static void test_func(ProcessPool &pool) {
@@ -129,6 +131,7 @@ TEST(process_pool, stream_protocol) {
 
 constexpr int magic_number = 99900011;
 static ProcessPool *current_pool = nullptr;
+static Worker *current_worker = nullptr;
 
 TEST(process_pool, shutdown) {
     ProcessPool pool{};
@@ -172,3 +175,56 @@ TEST(process_pool, shutdown) {
 
     ASSERT_EQ(*shm_value, magic_number);
 }
+
+TEST(process_pool, async) {
+    ProcessPool pool{};
+    ASSERT_EQ(pool.create(1, 0, SW_IPC_UNIXSOCK), SW_OK);
+
+    // init
+    pool.set_max_packet_size(8192);
+    pool.set_protocol(SW_PROTOCOL_TASK);
+    int *shm_value = (int *) sw_mem_pool()->alloc(sizeof(int));
+    pool.ptr = shm_value;
+    pool.async = true;
+
+    pool.onWorkerStart = [](ProcessPool *pool, Worker *worker) {
+        int *shm_value = (int *) pool->ptr;
+        *shm_value = magic_number;
+        current_worker = worker;
+
+        swoole_signal_set(SIGTERM, [](int sig) {
+            int *shm_value = (int *) current_pool->ptr;
+            (*shm_value)++;
+            current_pool->stop(current_worker);
+        });
+
+        usleep(10);
+    };
+
+    pool.onMessage = [](ProcessPool *pool, RecvData *msg) {
+        int *shm_value = (int *) pool->ptr;
+        (*shm_value)++;
+        kill(pool->master_pid, SIGTERM);
+    };
+
+    current_pool = &pool;
+    sysv_signal(SIGTERM, [](int sig) { current_pool->running = false; });
+
+    // start
+    ASSERT_EQ(pool.start(), SW_OK);
+
+    EventData msg{};
+    msg.info.len = 128;
+    swoole_random_string(msg.data, msg.info.len);
+    int worker_id = -1;
+    pool.dispatch_blocking(&msg, &worker_id);
+
+    // wait
+    ASSERT_EQ(pool.wait(), SW_OK);
+
+    // shutdown
+    pool.shutdown();
+    pool.destroy();
+
+    ASSERT_EQ(*shm_value, magic_number + 2);
+}
diff --git a/include/swoole_coroutine_socket.h b/include/swoole_coroutine_socket.h
index 8261693ee3..f5eff4a307 100644
--- a/include/swoole_coroutine_socket.h
+++ b/include/swoole_coroutine_socket.h
@@ -65,7 +65,7 @@ class Socket {
     Socket(SocketType type = SW_SOCK_TCP);
     Socket(int _fd, SocketType _type);
     ~Socket();
-    bool connect(std::string host, int port, int flags = 0);
+    bool connect(std::string host, int port = 0, int flags = 0);
     bool connect(const struct sockaddr *addr, socklen_t addrlen);
     bool shutdown(int how = SHUT_RDWR);
     bool cancel(const EventType event);