Improve test stability

[leo]

This pull request aims to make our test suite more stable.

[codecov-io]

Codecov Report

Merging #3208 into master will decrease coverage by 1.27%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #3208      +/-   ##
==========================================
- Coverage   13.17%   11.89%   -1.28%     
==========================================
  Files         268      268              
  Lines       10299    10171     -128     
  Branches     1218     1295      +77     
==========================================
- Hits         1357     1210     -147     
+ Misses       8884     8872      -12     
- Partials       58       89      +31

Impacted Files	Coverage Δ
src/util/dev/server.ts	57.6% <0%> (-5.85%)	⬇️
src/util/dev/builder.ts	72.72% <0%> (-5.6%)	⬇️
src/util/dev/builder-cache.ts	74.24% <0%> (-5.27%)	⬇️
src/util/dev/yarn-installer.ts	85.71% <0%> (-5.03%)	⬇️
src/util/dev/router.ts	78.57% <0%> (-4.13%)	⬇️
src/util/metrics.ts	68.18% <0%> (-2.41%)	⬇️
src/util/get-config.ts	0% <0%> (ø)	⬆️
src/util/deploy/process-deployment.ts	0% <0%> (ø)	⬆️
src/util/errors-ts.ts	47.51% <0%> (+0.02%)	⬆️
src/util/projects/get-project-by-id-or-name.ts	28.57% <0%> (+3.57%)	⬆️
... and 1 more

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