don't use randomly for two tests which assert ordering

[asottile]

makes it easier to debug #5468

[codecov]

Codecov Report

Merging #5472 into master will decrease coverage by 0.75%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #5472      +/-   ##
==========================================
- Coverage   96.03%   95.28%   -0.76%     
==========================================
  Files         115      115              
  Lines       25512    25512              
  Branches     2480     2480              
==========================================
- Hits        24501    24309     -192     
- Misses        706      888     +182     
- Partials      305      315      +10

Impacted Files	Coverage Δ
testing/python/integration.py	93.57% <100%> (ø)	⬆️
testing/python/approx.py	80.37% <0%> (-19.25%)	⬇️
testing/test_unittest.py	86.3% <0%> (-12.79%)	⬇️
src/_pytest/unittest.py	83.24% <0%> (-11.74%)	⬇️
src/_pytest/python_api.py	86.66% <0%> (-10.67%)	⬇️
src/_pytest/pytester.py	85.12% <0%> (-5.9%)	⬇️
src/_pytest/doctest.py	93.68% <0%> (-2.24%)	⬇️
src/_pytest/skipping.py	93.75% <0%> (-2.09%)	⬇️
testing/test_assertrewrite.py	82.26% <0%> (-1.53%)	⬇️
src/_pytest/capture.py	93.42% <0%> (-1.32%)	⬇️
... and 2 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 3d01dd3...fea77e6. Read the comment docs.

[asottile]

actually a good percentage of the testsuite isn't compatible, abandoning this

[blueyed]

actually a good percentage of the testsuite isn't compatible, abandoning this

Still better than nothing maybe? (ref: #4351)