[3.5] Add test for #3515 (#3517)

[asvetlov]

(cherry picked from commit aa5cccb)

Co-authored-by: Miha Jenko [email protected]

[codecov-io]

Codecov Report

Merging #3534 into 3.5 will increase coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##              3.5    #3534      +/-   ##
==========================================
+ Coverage   97.91%   97.92%   +0.01%     
==========================================
  Files          44       44              
  Lines        8565     8565              
  Branches     1382     1382              
==========================================
+ Hits         8386     8387       +1     
  Misses         72       72              
+ Partials      107      106       -1

Impacted Files	Coverage Δ
aiohttp/test_utils.py	99.35% <0%> (+0.32%)	⬆️

---

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 c6ee1a7...b5f1fea. Read the comment docs.

[lock]

This thread has been automatically locked since there has not been
any recent activity after it was closed. Please open a new issue for
related bugs.

If you feel like there's important points made in this discussion,
please include those exceprts into that new issue.