Add missing test typing

[bdraco]

#24 (comment)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 87.54%. Comparing base (d85d326) to head (9d2d08c).
Report is 2 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master      #34   +/-   ##
=======================================
  Coverage   87.54%   87.54%           
=======================================
  Files          22       22           
  Lines         771      771           
  Branches       63       63           
=======================================
  Hits          675      675           
  Misses         68       68           
  Partials       28       28           

Flag	Coverage Δ
CI-GHA	87.54% <100.00%> (ø)
MyPy	69.79% <100.00%> (+2.06%)	⬆️
OS-Linux	98.67% <100.00%> (ø)
OS-Windows	93.89% <100.00%> (ø)
OS-macOS	94.38% <100.00%> (ø)
Py-3.10.11	93.39% <100.00%> (ø)
Py-3.10.15	96.03% <100.00%> (ø)
Py-3.11.10	96.03% <100.00%> (ø)
Py-3.11.9	93.39% <100.00%> (ø)
Py-3.12.6	95.93% <100.00%> (ø)
Py-3.13.0-rc.3	95.93% <100.00%> (ø)
Py-3.8.10	93.70% <100.00%> (ø)
Py-3.8.18	96.35% <100.00%> (ø)
Py-3.9.13	93.37% <100.00%> (ø)
Py-3.9.20	96.02% <100.00%> (ø)
Py-pypy7.3.11	96.16% <100.00%> (ø)
Py-pypy7.3.16	95.78% <100.00%> (ø)
Py-pypy7.3.17	95.80% <100.00%> (ø)
VM-macos-latest	94.38% <100.00%> (ø)
VM-ubuntu-latest	98.67% <100.00%> (ø)
VM-windows-latest	93.89% <100.00%> (ø)
pytest	98.54% <100.00%> (ø)

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