Translation assessment turnaround time

Hi guys, I completed a 500 word translation assessment for a big agency exactly a week ago and haven’t heard back yet. I originally thought I’d follow up after a week but now I worry that I’m just too impatient, what’s your experience with this? How long do these things take to review? And at what point do you reckon is it okay to follow up? I don’t have a lot of experience with this and I’m just really nervous because I want this so bad.

Thanks!