[chef] ChefDK and rake

[Booker Bense < >]

I'm testing a cookbook I set up with mis using the ChefDK environment. 

I have done chef shell-init  and 

which  rspec returns 

/opt/chefdk/embedded/bin/rspec

This command runs the chefspec tests. 

chef exec rspec test/unit/spec

However this rake task fails with error suggesting it's using the wrong rspec

require 'rspec/core/rake_task'

desc 'Run ChefSpec unit tests'

RSpec::Core::RakeTask.new(:spec) do |t, _args|

  t.rspec_opts = 'test/unit/spec'

end

Is there something obvious I'm missing to make this work? 

- Booker C. Bense