Test: add missing await as suggested #2433

Job	Run time
Cache identify	5s
Shellcheck	5s
Dependency	3s
Prepare	10s
Ruff check and force	12s
Check commit	35s
Run pytest using Python 3.13	22s
Run mypy	0s
Build and publish Python 🐍 distributions 📦 to TestPyPI	0s
Process test coverage	0s
Process test complexity	0s
	1m 32s

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