To test the reporter locally, link it to itself and then run a test with the reporter set:
$ npm link
$ npm link testcafe-reporter-saucelabs
$ npx testcafe chrome tests/integration/sauceswag.ok.test.js --reporter saucelabs
Problem
$ npx testcafe chrome tests/integration/sauceswag.test.js --reporter saucelabs
ERROR The "saucelabs" reporter does not exist. Check the reporter parameter for errors.
Solution
Re-link the package:
npm link && npm link testcafe-reporter-saucelabs