Rubocop & Rspec headache with testing a module

rubobadcop_spec.rb

# I either end up with a rubocop error or an rspec error.  In each case, the travis build will not pass.

# Rubocop error:
# RSpec/DescribedClass: Use described_class instead of Hydra::Works::GenericFile::Characterization
describe Hydra::Works::GenericFile::Characterization do
  let(:demo_class) do
    Class.new(Hydra::Works::GenericFile::Base) do
      include Hydra::Works::GenericFile::Characterization
    end
  end
end


# RSpec error: 
#Failure/Error: include described_class
#     NameError:
#       undefined local variable or method `described_class' for #<Class:0x007f30ff496718>
describe Hydra::Works::GenericFile::Characterization do
  let(:demo_class) do
    Class.new(Hydra::Works::GenericFile::Base) do
      include described_class
    end
  end
end