devise datamapper test failures

5) Error:
test_destroyed_account_is_signed_out(AuthenticationTest):
NoMethodError: undefined method `destroy_all' for User:Class

 23) Error:
test_should_not_regenerate_unlock_token_if_it_already_exists(LockableTest):
NoMethodError: undefined method `lock!' for #<User:0x107b26940>

 46) Error:
test_forget_me_should_clear_remember_created_at(RememberableTest):
NoMethodError: undefined method `remember_created_at?' for #<User:0x1096e6568>


 47) Error:
test_forget_me_should_clear_remember_token_and_save_the_record_without_validating(RememberableTest):
NoMethodError: undefined method `remember_token?' for #<User:0x10961cba0>


 52) Error:
test_time_out_user_session_after_default_limit_time(SessionTimeoutTest):
NoMethodError: undefined method `user_session' for #<Devise::FailureApp:0x1089c5000>


VALIDATIONS:

  <"blank"> expected to be =~
  </can't\ be\ blank/>.

  <"invalid"> expected to be =~
  </is\ invalid/>.

  <"not found"> expected but was
  <"not_found">.

  <"was already confirmed"> expected but was
  <"already_confirmed">.

  <"was already confirmed"> expected but was
  <"already_confirmed">.

  <"can't be blank"> expected but was
  <"blank">.

  <"is invalid"> expected but was
  <"invalid">.