runner.js

const createTestCafe = require('testcafe');

let runner = null;

process.on('unhandledRejection', e => console.log(e.stack));

createTestCafe('localhost', 1337, 1338)
    .then(testcafe => {
        runner = testcafe.createRunner();

        return runner
            .src('tests/myFixture.js')
            .browsers('chrome')
            .reporter('spec')
            .run()
            .then(failedCount => {
                /* ... */
            })
            .catch(error => {
                /* ... */
            })
            .then(() => {
                return testcafe.close();
            });
    });