The bug was introduced by the following change: https://github.com/openstack-dev/pbr/commit/d67f22fc3fa7e4ca7de5406edf3df4446509b01f
pre_run was a method of _PipInstallTestRequires class whic hwas removed.
The bug was introduced by the following change: https:/ /github. com/openstack- dev/pbr/ commit/ d67f22fc3fa7e4c a7de5406edf3df4 446509b01f
pre_run was a method of _PipInstallTest Requires class whic hwas removed.