[CentOS] yum does not update package list

Hello. I have been trying to add rpmforge as a repository, but yum does not seem to be updating the package lists. I tried

$ yum check-updates

[...] Loading mirror speeds from cached hostfile * base: <mirror> * epel: <mirror> * extras: <mirror> * rpmforge: mirror.ate.info * updates: <mirror>

and searched for any package available there, like i3 and mpv. It is still like the repository was never added. I imported the GPG key mentioned in the wiki, and installed http://pkgs.repoforge.org/rpmforge-release/rpmforge-release-0.5.3-1.el7.rf.x86_64.rpm, checked /etc/yum.repos.d/rpmforge.repo and it is enabled. Tried enabling rpmforge-extras and rpmforge-testing, but i noticed no difference.

I am using CentOS 7.