The tub will perform a GFCI test within the first week to which it will simulate a ground fault and the breaker should kill power to the tub. Mine was in the first day or so.
You can test it yourself from the settings menu. The breaker needs to trip for either the automatic test or the manual test. If it doesn't trip, the test failed. That usually means the GFCI install is wrong.
I would run the manual test. If it fails again, call your electrician to double check the install.
