Test failure on Ruby 2.2 (maybe 2.X)

[SpainTrain]

This may not affect the plugin code itself, but the confil file does not exist test fails on Ruby 2.2.2

Unhandled rejection AssertionError: expected 'Input file did not exist or was not readable' to equal 'Config file did not exist or was not readable'
    at Stream.<anonymous> (/home/spainhower/repos/gulp-scss-lint/test/main.js:369:37)
    at emitOne (events.js:77:13)
    at Stream.emit (events.js:169:7)
    at /home/spainhower/repos/gulp-scss-lint/src/index.js:33:16
    at tryCatcher (/home/spainhower/repos/gulp-scss-lint/node_modules/bluebird/js/main/util.js:26:23)
    at Promise._settlePromiseFromHandler (/home/spainhower/repos/gulp-scss-lint/node_modules/bluebird/js/main/promise.js:507:31)
    at Promise._settlePromiseAt (/home/spainhower/repos/gulp-scss-lint/node_modules/bluebird/js/main/promise.js:581:18)
    at Promise._settlePromises (/home/spainhower/repos/gulp-scss-lint/node_modules/bluebird/js/main/promise.js:697:14)
    at Async._drainQueue (/home/spainhower/repos/gulp-scss-lint/node_modules/bluebird/js/main/async.js:123:16)
    at Async._drainQueues (/home/spainhower/repos/gulp-scss-lint/node_modules/bluebird/js/main/async.js:133:10)
    at Immediate.Async.drainQueues [as _onImmediate] (/home/spainhower/repos/gulp-scss-lint/node_modules/bluebird/js/main/async.js:15:14)
    at processImmediate [as _immediateCallback] (timers.js:374:17)
    1) confil file does not exist