chage -d 0 <username>
Will force password reset through expiration.
Also for expiration check to verify expiration was set correctly there are a few places it can be set.
Also -- for setting a specific user's expiration I recommend just using:
passwd -x 56 <username>
That will set expiration to 56 for specified user.
Then check /etc/shadow to verify expiration is set correctly for test user. (4th from the end)