nescafe_formatter_rspec1.rb

require 'spec/runner/formatter/progress_bar_formatter'

class NescafeFormatter < Spec::Runner::Formatter::ProgressBarFormatter
  def example_failed(example, counter, failure)
    super
    dump_failure(counter, failure)
  end
end

nescafe_formatter_rspec2.rb

require 'rspec/core/formatters/progress_formatter'

class NescafeFormatter < RSpec::Core::Formatters::ProgressFormatter
  def example_failed(example, counter, failure)
    super
    dump_failure(counter, failure)
  end
end

spec.opts

--colour
--require spec/support/formatters/nescafe_formatter.rb
--format NescafeFormatter
--loadby mtime
--reverse