* Clean unused import
* nit
* nit: improve docstring.
* Refactor sample test into digesting params from config yaml files.
* Fix argument assignment.
* Fix path.
* Fix output params. Not every test is using it.
* Add output placeholder in yaml config.
* Fix yaml config.
* Minor fix.
* Minor fix.
* Move timeout info to config.yaml, too
* Fix import in check_notebook_results.py
* Add type hints in config.yaml
* Remove redundant close.