Grape issue code

config.ru

require './test'

run Test::API

Gemfile

source 'https://rubygems.org'

gem 'grape', '~> 0.10.1'
gem 'activesupport', '~> 4.2.0'

Gemfile.lock

GEM
  remote: https://rubygems.org/
  specs:
    activesupport (4.2.1)
      i18n (~> 0.7)
      json (~> 1.7, >= 1.7.7)
      minitest (~> 5.1)
      thread_safe (~> 0.3, >= 0.3.4)
      tzinfo (~> 1.1)
    axiom-types (0.1.1)
      descendants_tracker (~> 0.0.4)
      ice_nine (~> 0.11.0)
      thread_safe (~> 0.3, >= 0.3.1)
    builder (3.2.2)
    coercible (1.0.0)
      descendants_tracker (~> 0.0.1)
    descendants_tracker (0.0.4)
      thread_safe (~> 0.3, >= 0.3.1)
    equalizer (0.0.11)
    grape (0.10.1)
      activesupport
      builder
      hashie (>= 2.1.0)
      multi_json (>= 1.3.2)
      multi_xml (>= 0.5.2)
      rack (>= 1.3.0)
      rack-accept
      rack-mount
      virtus (>= 1.0.0)
    hashie (3.4.1)
    i18n (0.7.0)
    ice_nine (0.11.1)
    json (1.8.2)
    minitest (5.6.0)
    multi_json (1.11.0)
    multi_xml (0.5.5)
    rack (1.6.0)
    rack-accept (0.4.5)
      rack (>= 0.4)
    rack-mount (0.8.3)
      rack (>= 1.0.0)
    thread_safe (0.3.5)
    tzinfo (1.2.2)
      thread_safe (~> 0.1)
    virtus (1.0.5)
      axiom-types (~> 0.1)
      coercible (~> 1.0)
      descendants_tracker (~> 0.0, >= 0.0.3)
      equalizer (~> 0.0, >= 0.0.9)

PLATFORMS
  ruby

DEPENDENCIES
  activesupport (~> 4.2.0)
  grape (~> 0.10.1)

test.rb

require 'grape'

module Test
    class API < Grape::API
        version 'v1', using: :header, vendor: 'josh'
        format :json
        prefix :api

        resource :test do

            desc "Test."
            params do
              requires :country, type: String, desc: "Country."
            end
            route_param :country do
              get do
                "Hello World!"
              end
            end
        end
    end
end