As discussed at today's cinder meeting, there are patches available that address the lower constraints problems arising from the upgraded pip dependency resolver for most cinder deliverables. Except for master, I've tried to keep the changes minimal. One possibly controversial change has been to add indirect dependencies to test-requirements.txt in a few cases where the version range was so wide that the resolver was taking a very long time to figure out a satisfactory resolution. An example of this is the cinder stable/train patch: https://review.opendev.org/c/openstack/cinder/+/767954 I'm not sure when these patches will be merged, but you can always add the appropriate one as a dependency in gerrit to get the check jobs to pass on your patch. You can find them by using the gerrit hashtag 'fix-l-c': https://review.opendev.org/q/hashtag:fix-l-c Apparently only the owner of a review can add a hashtag, so os-brick/master (merged, owned by lpetrut) and the patches for the non-releaseable stable branches that e0ne is working on aren't in the list yet.