We are implementing pushwoosh in production and I don't know how to send push messages only to test devices. That's why I have to be careful doing tests.
Looking in the documentation I found that filters can be applied, can it be that there is a native filter "TestDevices"?
Notification::create()->setFilter ("TestDevices")->setContent ("Content");
If not, as would be the steps to send push notification only to test device, sorry if it is in the documentation and I did not see it.