You’re probably talking about the GoControl GB00Z?
I haven’t tested mine in quite a while, but here’s what worked for me.
Put some silverware in a glass cup, then put the glass down on a surface near the sensor, with enough force to make some noise, and then shake the silverware around a bit.
Can’t recall where I read about that, but it worked for me.
I actually participated in a job with a real alarm company installer.
He had a device which made a glass breakage sound.
It was a portable, hand held device.
Probably available on ebay.
Like this: