For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:derselbst/openSUSE_Tumbleweed/home:derselbst.repo
zypper refresh
zypper install phoronix-test-suite
For openSUSE Slowroll run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:derselbst/openSUSE_Slowroll/home:derselbst.repo
zypper refresh
zypper install phoronix-test-suite
For 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:derselbst/15.6/home:derselbst.repo
zypper refresh
zypper install phoronix-test-suite