-Browsers = require('../lib/browsers')
-Prefixes = require('../lib/prefixes')
-info     = require('../lib/info')
+browserslist = require('browserslist')
+Browsers     = require('../lib/browsers')
+Prefixes     = require('../lib/prefixes')
+info         = require('../lib/info')
 
 data =
   browsers: require('caniuse-db/data.json').agents

      ['chrome 30', 'firefox 21', 'firefox 20', 'ie 6'])
    prefixes = new Prefixes(data.prefixes, browsers)

    info(prefixes).should.eql "Browsers:\n" +
                              "  Chrome: 30\n" +
                              "  Firefox: 21, 20\n" +
                              "  IE: 6\n" +
                              "\n" +
                              "These browsers account for 0.13% " +
                                "of all users globally\n" +
                              "\n" +
                              "At-Rules:\n" +

    browsers = new Browsers(data.browsers, ['chrome 30', 'firefox 20', 'ie 6'])
    prefixes = new Prefixes(data.prefixes, browsers)

    coverage = browserslist.coverage(['chrome 30', 'firefox 20', 'ie 6'])
    round    = Math.round(coverage * 100) / 100.0

    info(prefixes).should.eql "Browsers:\n" +
                              "  Chrome: 30\n" +
                              "  Firefox: 20\n" +
                              "  IE: 6\n" +
                              "\n" +
                              "These browsers account for #{ round }% " +
                                "of all users globally\n" +
                              "\n" +
                              "Properties:\n" +
