This is when you deliberately see a message then don't reply to test is your bæ is a true bae.
If they then send another to carry on the conversation, they've passed.
If not... They failed
Girl 1: Aww bæs texted...
Girl 2: you sure he's your real
bæ ?
Girl 1: yeah I think so...?
Girl 2: why not give him
The Bae Test to see...
