I worked with Tinkerwell for 3 years... But when I found Tinkerun I was saved, it's amazing, well done, open source and most important, useful!
Tinkerun doesn't need complex scenarios or the fanciest interfaces (but it has), it goes to the point, connect virtually with your tinker console.
The only problem I see (but not a real problem at all), it's that only the last line is printed. So take care about the order of your commands or what you have at the end of the testing code.
It missed custom themes for monaco, it would be greatful if we could control the monaco theme rather than the theme of Tinkerrun in general.