Improve testcode as suggested #6318

Job	Run time
Dependency	6s
Shellcheck	5s
Cache identify	6s
Prepare	1m 48s
Ruff check and force	9s
Check commit	29s
Run pytest using Python 3.13	21s
Run pytest using Python 3.14	15s
Run mypy	16s
Process test coverage	13s
Build and publish Python 🐍 distributions 📦 to TestPyPI	11s
Process test complexity	12s
	4m 11s

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