diff --git a/pkg/transport/timeout_dialer_test.go b/pkg/transport/timeout_dialer_test.go
index 12eff0f20..14e95516c 100644
--- a/pkg/transport/timeout_dialer_test.go
+++ b/pkg/transport/timeout_dialer_test.go
@@ -50,7 +50,8 @@ func TestReadWriteTimeoutDialer(t *testing.T) {
 
 	select {
 	case <-done:
-	case <-time.After(d.wtimeoutd * 10):
+	// It waits 1s more to avoid delay in low-end system.
+	case <-time.After(d.wtimeoutd*10 + time.Second):
 		t.Fatal("wait timeout")
 	}
 
diff --git a/pkg/transport/timeout_listener_test.go b/pkg/transport/timeout_listener_test.go
index 6ee15441f..085a57559 100644
--- a/pkg/transport/timeout_listener_test.go
+++ b/pkg/transport/timeout_listener_test.go
@@ -76,7 +76,8 @@ func TestWriteReadTimeoutListener(t *testing.T) {
 
 	select {
 	case <-done:
-	case <-time.After(wln.wtimeoutd * 10):
+	// It waits 1s more to avoid delay in low-end system.
+	case <-time.After(wln.wtimeoutd*10 + time.Second):
 		t.Fatal("wait timeout")
 	}