There is a known issue[1], that causes this version to break piglit's unitests. There is a fix queued for 3.0.3, and when that's released this can be changed to '>=3.0.3'. In the meantime this patch fixes it by not letting tox install the bad version.
[1] https://github.com/pytest-dev/pytest/issues/1905
286dbf3 tox: Don't use pytest 3.0.2
tox.ini | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
Upstream: cgit.freedesktop.org