diff --git a/net/gtcp/gtcp_unit_pool_test.go b/net/gtcp/gtcp_unit_pool_test.go
index 3cbaea6fe..e7bd7a495 100644
--- a/net/gtcp/gtcp_unit_pool_test.go
+++ b/net/gtcp/gtcp_unit_pool_test.go
@@ -27,10 +27,8 @@ func Test_Pool_Basic1(t *testing.T) {
 		}
 	})
 	go s.Run()
-	defer func() {
-		s.Close()
-	}()
-	time.Sleep(100 * time.Millisecond)
+	defer s.Close()
+	time.Sleep(500 * time.Millisecond)
 	gtest.Case(t, func() {
 		conn, err := gtcp.NewPoolConn(fmt.Sprintf("127.0.0.1:%d", p))
 		gtest.Assert(err, nil)
@@ -49,10 +47,8 @@ func Test_Pool_Basic2(t *testing.T) {
 		conn.Close()
 	})
 	go s.Run()
-	defer func() {
-		s.Close()
-	}()
-	time.Sleep(100 * time.Millisecond)
+	defer s.Close()
+	time.Sleep(500 * time.Millisecond)
 	gtest.Case(t, func() {
 		conn, err := gtcp.NewPoolConn(fmt.Sprintf("127.0.0.1:%d", p))
 		gtest.Assert(err, nil)