For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:brassh/openSUSE_Tumbleweed/home:brassh.repo
zypper refresh
zypper install python-pytest-xdist
For graphics run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:brassh/graphics/home:brassh.repo
zypper refresh
zypper install python-pytest-xdist
For 16.0 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:brassh/16.0/home:brassh.repo
zypper refresh
zypper install python-pytest-xdist