Handle case where stdout doesn't have a buffer attribute

[MrCreosote]

e.g. Jupyter notebooks

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 73.03%. Comparing base (0cd4eea) to head (15f4cec).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #30      +/-   ##
==========================================
+ Coverage   72.72%   73.03%   +0.30%     
==========================================
  Files           1        1              
  Lines         264      267       +3     
==========================================
+ Hits          192      195       +3     
  Misses         72       72              

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