Install the following packages:
<pre><code class="lang-json">"@babel/core": "^7.15.0",
"@babel/preset-env": "^7.15.0",
"babel-jest": "^26.0.1",
"jest": "^26.0.1"
</code></pre>
Create a file <code>babel.config.json</code> to be used by babel:
<pre><code class="lang-json">{
 "presets": ["@babel/preset-env"]
}
</code></pre>
Now you should be able to write unit tests in ES6 syntax.

Install the following packages:

```json
"@babel/core": "^7.15.0",
"@babel/preset-env": "^7.15.0",
"babel-jest": "^26.0.1",
"jest": "^26.0.1"
```

Create a file `babel.config.json` to be used by babel:

```json
{
  "presets": ["@babel/preset-env"]
}
```

Now you should be able to write unit tests in ES6 syntax.

How to setup jest for ES6 syntax