RSpec + Machinist. auto_increment issue

Question

By default, "rake specs" re-creating my test database, using environment's one.

It removes all the data, but not the the auto_increment. So when i'll try to make a new user:

User.blueprint do
  login { Sham.login }
  email { Sham.email }
end

# the test:
user = User.make
user.id.should == 1

It says, that ID was 1800 (auto_increment was't refresehed).

Another problem: is there a way to disable recreating database, instead of just truncate all the tables? I don't use fixtures, and this would make my tests run faster.