RSpec fails testing on ActiveRecord


I’m new to RoR, and following the RoR 3.2 Tutorial from Michael H…

When it comes to execute testing (chap. 3.2.1), RSpec returns a hundred
of errors starting with this one (and all looking the same more or

`resolve_hash_connection’: database configuration does not specify
adapter (ActiveRecord::AdapterNotSpecified)

My DEV database is PostgreSQL and looks to work fine.

Can some help me to understand what’s wrong and solve it ?