Snippet to be placed in test_helper.rb or spec_helper.rb to trick has_secure_password into using lower cost bcrypt encryption than the default.

authlogic.rb

# Place in test_helper.rb or spec_helper.rb
AuthLogic::CryptoProviders::BCrypt.cost = 1

bcrypt.rb

# Place in test_helper.rb, spec_helper.rb or spec/support/...
require 'bcrypt'

class BCrypt::Password
  class << self
    method = instance_method(:create)
    define_method :create do |arg, options = {cost: 1}|
      method.bind(self).call(arg, options)
    end
  end
end

devise.rb

# Place in test_helper.rb or spec_helper.rb
Devise.setup do |config|
  config.stretches = 1
end

gistfile1.txt

# Before...
$ bundle exec rspec ./spec/features
..................................................................................................................

Finished in 42.67 seconds
114 examples, 0 failures

Randomized with seed 48858

# ...and after
$ SPEC_OPTS="--seed 48858" bundle exec rspec ./spec/features
..................................................................................................................

Finished in 27.36 seconds
114 examples, 0 failures

Randomized with seed 48858