Test with no --extensions-dir

[roblourens]

No description provided.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 47%. Comparing base (3bbfebc) to head (41706ed).
⚠️ Report is 1493 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff            @@
##            main   #12099     +/-   ##
========================================
- Coverage     60%      47%    -14%     
========================================
  Files        498      497      -1     
  Lines      35708    35813    +105     
  Branches    5791     5493    -298     
========================================
- Hits       21774    17006   -4768     
- Misses     11929    17302   +5373     
+ Partials    2005     1505    -500     

see 273 files with indirect coverage changes

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