Para openSUSE Leap 15.6 corra o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/devel:openQA:GitHub:os-autoinst:openQA:PR-6311/openSUSE_Leap_15.6/devel:openQA:GitHub:os-autoinst:openQA:PR-6311.repo
zypper refresh
zypper install openQA
Para SLE 15 SP6 Backports corra o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/devel:openQA:GitHub:os-autoinst:openQA:PR-6311/SLE_15_SP6_Backports/devel:openQA:GitHub:os-autoinst:openQA:PR-6311.repo
zypper refresh
zypper install openQA