Big Sean Please Mama Don't Spill the Beans on Ariana!!!

3/9/2015 7:19 AM PDT

Ariana Grande has passed the most important Big Sean dating test -- she's got the public approval of his mother ... much to the dismay of her son.

Big Sean and his adorable mom were at LAX on Sunday when our photog warmed them up with a few questions ... before slipping in one on Ariana.  

Before the rapper could deflect, mom was singing Ariana's praises ... and Sean couldn't stop her.

Wonder if she felt the same about Naya Rivera?