I have PostgreSQL database. It is used for unit testing. I want to speed the tests up so I want to use some kind of in-memory databases (e.g. H2). I want to dump the database (from PostgreSQL) and the import such a dump into in-memory database. Do you have any suggestion concerning in-memory database choice? I want that database to be compatible with PostgreSQL.

unit testing with in-memory database

I have PostgreSQL database. It is used for unit testing.

I want to speed the tests up so I want to use some kind of in-memory databases (e.g. H2).
I want to dump the database (from PostgreSQL) and the import such a dump into in-memory database.

Do you have any suggestion concerning in-memory database choice? I want that database to be compatible with PostgreSQL.