I was in your situation once, worked for Andersen and a regional firm, two good firms.
This is par for the course. If you like the career and feel like it is rewarding to you, I would bend and do your time trial on your own. If you intend to leave soon, consider your client's needs first anyway. Bridges are burned in this industry and that makes no sense.
If you don't give a f*** and are selfish, call in sick Saturday and run under 50:00.