List available tests with py.test
You can also use --collect-only, this will show a tree-like structure of the collected nodes. Usually one can simply -k on the names of the Function nodes.
You should use the flag --collect-only. If you are using pytest 5.3.0 or newer use --co.
pytest 5.3.0+
pytest --co
previous versions
pytest --collect-only
You can use this flag among other flags, so in your case pytest --co -k PATTERN.