For openSUSE Leap 15.5 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/devel:openQA:GitHub:os-autoinst:openQA:PR-5490/openSUSE_Leap_15.5/devel:openQA:GitHub:os-autoinst:openQA:PR-5490.repo
zypper refresh
zypper install openQA-worker
For SLE 15 SP6 Backports run the following as root:
zypper addrepo https://download.opensuse.org/repositories/devel:openQA:GitHub:os-autoinst:openQA:PR-5490/SLE_15_SP6_Backports/devel:openQA:GitHub:os-autoinst:openQA:PR-5490.repo
zypper refresh
zypper install openQA-worker