CapacitorGoogleAuth: SyntaxError: Cannot use import statement outside a module

Trying to use Ionic with react framework, and when running a basic debug test, I get the following error:

Jest encountered an unexpected token

Details:

C:\Users\<User>\Documents\GitHub\<appname>\node_modules\@codetrix-studio\capacitor-google-auth\dist\esm\index.js:1
({"Object.<anonymous>":function(module,exports,require,__dirname,__filename,global,jest){import { registerPlugin } from '@capacitor/core';
                                                                                         ^^^^^^

SyntaxError: Cannot use import statement outside a module

  1 | import { IonButton, IonContent, IonHeader,IonInput,IonLoading,IonPage, IonTitle, IonToolbar, IonIcon} from '@ionic/react';
> 2 | import { GoogleAuth } from '@codetrix-studio/capacitor-google-auth';
    | ^
  3 | import { useEffect, useState } from 'react';
  4 | import { loginUser } from '../firebaseConfig';
  5 | import ExploreContainer from '../components/ExploreContainer';

  at Runtime.createScriptFromCode (node_modules/jest-runtime/build/index.js:1350:14)
  at Object.<anonymous> (src/pages/Login.tsx:2:1)

This ONLY occurs when the capactior-google-auth plugin is used, when that’s taken out, the test runs fine, even though there are plenty of other code modules. Does anyone have any idea what’s causing this?