.babelrc

{
    "presets": ["@babel/env", "power-assert"],
    "plugins": [
        "@babel/plugin-proposal-function-bind",
        "@babel/plugin-proposal-class-properties",
        [
            "@babel/plugin-transform-runtime",
            {
              "regenerator": true
            }
        ],
        ["babel-plugin-espower", {
            "patterns": [
                "t(value, [message])",
                "t.ok(value, [message])",
                "t.equal(actual, expected, [message])",
                "t.notEqual(actual, expected, [message])",
                "t.strictEqual(actual, expected, [message])",
                "t.notStrictEqual(actual, expected, [message])",
                "t.deepEqual(actual, expected, [message])",
                "t.notDeepEqual(actual, expected, [message])",
                "t.deepStrictEqual(actual, expected, [message])",
                "t.notDeepStrictEqual(actual, expected, [message])",
                "t.throws(block, [error], [message])"
            ]
        }]
    ]
}