How to import class to test using ES6 modules

Hello I have a folder structure that looks like this:

• Folder
  • index.js
  • someClass.js
  • index.html
• Tests
  • someclass.test.js

I've exported this someClass using export default, imported it using import statement to index.js and after I open index.html, everything works, however I can't import this class to someClass.test.js file and after I run jest I get this error

 **SyntaxError: Cannot use import statement outside a module**

I've also changed type property in package.json file to be module. How to solve this issue?