Add missing self #5999

Job	Run time
Shellcheck	7s
Dependency	6s
Cache identify	6s
Prepare	11s
Ruff check and force	6s
Check commit	-1s
Run pytest using Python ${{ matrix.python-version }}	0s
Run mypy	0s
Process test complexity	0s
Build and publish Python 🐍 distributions 📦 to TestPyPI	0s
Process test coverage	0s
	35s

Provide feedback