[nickkell]

Using an in-memory database does not increase my confidence that in my software either. I also started using dockerised dependencies in tests a couple of years ago.

Can you please explain what you did with a RAM disk to speed them up?

[bunderbunder]

Configure the container with a tmpfs volume (https://docs.docker.com/storage/tmpfs/), and configure the database server to store all its files in that volume's directory.