Marking few tests are serial

[gavin-aguiar]

Description

Fixes #

---

PR information

• [ ] The title of the PR is clear and informative.
• [ ] There are a small number of commits, each of which has an informative message. This means that previously merged commits do not appear in the history of the PR. For information on cleaning up the commits in your pull request, see this page.
• [ ] If applicable, the PR references the bug/issue that it fixes in the description.
• [ ] New Unit tests were added for the changes made and CI is passing.

Quality of Code and Contribution Guidelines

• [ ] I have read the contribution guidelines.

[codecov[bot]]

Codecov Report

Merging #1277 (598f543) into dev (cd16cf0) will decrease coverage by 0.57%. The diff coverage is n/a.

@@            Coverage Diff             @@
##              dev    #1277      +/-   ##
==========================================
- Coverage   83.98%   83.41%   -0.57%     
==========================================
  Files          34       34              
  Lines        1904     1893      -11     
  Branches      366      278      -88     
==========================================
- Hits         1599     1579      -20     
- Misses        234      242       +8     
- Partials       71       72       +1     

Flag	Coverage Δ
unittests	83.41% <ø> (-0.52%)	:arrow_down:

Flags with carried forward coverage won't be shown. Click here to find out more.

see 6 files with indirect coverage changes