Some of the unit tests are failing CI

[joseph-v]

Issue/Feature Description:
Some of the unit tests are failing CI when run under Ubuntu 20.04 and Python3.8.
Currently it is commented in PR #1006

Why this issue to fixed / feature is needed(give scenarios or use cases):

How to reproduce, in case of a bug:

Other Notes / Environment Information: (Please give the env information, log link or any useful information for this issue)