Does Automount/autofs automagically run e2fsck? If so, how does one disable this?

We have an external USB connected 2TB hard drive setup to automount. Sometimes e2fsck gets fired up, I think from Automount. I have this line in the automount config:

/backupdisk -fstype=ext3,nocheck :LABEL=BACKUP

I believe this should prevent Automount from running e2fsck, but it still runs it.

(We have a cron job that daily does a e2fsck -p on this disk at a 'quiet' time.)