Add guarding, as suggested #2268

Job	Run time
Prepare	1m 3s
Shellcheck	4s
Dependency	4s
Ruff check and force	15s
Check commit	52s
Create pytest cache for Python 3.13	18s
Run pytest using Python 3.13	23s
Run mypy	24s
Process test coverage	11s
Process test complexity	0s
Build and publish Python 🐍 distributions 📦 to TestPyPI	0s
	3m 34s

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