yarn add eslint eslint-plugin-testcafe --dev # or use npm, doesn't change anything
node_modules/eslint/bin/eslint.js tests/

import { Selector } from 'testcafe';

fixture `Getting Started`
  .page `some_url`;

test('some test', async t => {
  await t.expect(Selector('h1').innerText).contains('test');
});

{   "parserOptions": {
      "ecmaVersion": 7,
      "sourceType": "module",
      "ecmaFeatures": {
          "jsx": true,
      }
  },
  "plugins": [
    "testcafe"
  ],
  "globals": {
    "t": true // this seems to have no effect
  },
  "extends": "plugin:testcafe/recommended"
}