libpam-pwquality not working in Ubuntu 16.04

I installed libpam-pwquality: sudo apt-get install libpam-pwquality And configured /etc/pam.d/common-password: password requisite pam_pwquality.so retry=3 minlen=10 password [success=1 default=ignore] pam_unix.so obscure use_authtok try_first_pass sha512 password required pam_deny.so password required pam_permit.so Then when I ran passwd, I could still set a password of 2 or 3 characters. What was missing?