Getting error builder.knex(...).queryBuilder is not a function

Question

When running the app with sails lift it all works fine and as expected, but when I run this in the Jest test suite, it stops working.

In another StackOverflow question it is mentioned that this means the Knex config wasn't given to Objection correctly, but there's no discrepancy between Knex using Jest and the running production code.

The BeforeAll() function

async function createMockUsers() {
  config.users.forEach(async function(user) {
    await sails.helpers.createUser(
      user.firstName,
      user.lastName,
      user.phone,
      user.password,
      user.role
    );
  });
}

// Before running any tests...
beforeAll(function(done) {
  // process.env = config.env_variables;

  sails.lift({

    // Your sails app's configuration files will be loaded automatically,
    // but you can also specify any other special overrides here for testing purposes.

    // For example, we might want to skip the Grunt hook,
    // and disable all logs except errors and warnings:
    // hooks: { grunt: false },
    log: { level: 'warn' },
    port: 1338,

  }, async function(err) {
    if (err) { return done(err); }
    await createMockUsers();
    // here you can load fixtures, etc.


    return done();
  });
}, 60000);

The Error

TypeError: builder.knex(...).queryBuilder is not a function
    at buildKnexQuery (C:\Users\Binny Zupnick\Development\onefiftyone\node_modules\objection\lib\queryBuilder\QueryBuilder.js:1359:63)
    at doExecute (C:\Users\Binny Zupnick\Development\onefiftyone\node_modules\objection\lib\queryBuilder\QueryBuilder.js:1250:31)
    at Bluebird.try.then (C:\Users\Binny Zupnick\Development\onefiftyone\node_modules\objection\lib\queryBuilder\QueryBuilder.js:563:19)
    at tryCatcher (C:\Users\Binny Zupnick\Development\onefiftyone\node_modules\bluebird\js\release\util.js:16:23)
    at Promise._settlePromiseFromHandler (C:\Users\Binny Zupnick\Development\onefiftyone\node_modules\bluebird\js\release\promise.js:512:31)
    at Promise._settlePromise (C:\Users\Binny Zupnick\Development\onefiftyone\node_modules\bluebird\js\release\promise.js:569:18)
    at Promise._settlePromise0 (C:\Users\Binny Zupnick\Development\onefiftyone\node_modules\bluebird\js\release\promise.js:614:10)
    at Promise._settlePromises (C:\Users\Binny Zupnick\Development\onefiftyone\node_modules\bluebird\js\release\promise.js:694:18)
    at _drainQueueStep (C:\Users\Binny Zupnick\Development\onefiftyone\node_modules\bluebird\js\release\async.js:138:12)
    at _drainQueue (C:\Users\Binny Zupnick\Development\onefiftyone\node_modules\bluebird\js\release\async.js:131:9)
    at Async.Object.<anonymous>.Async._drainQueues (C:\Users\Binny Zupnick\Development\onefiftyone\node_modules\bluebird\js\release\async.js:147:5)
    at Immediate.Async.drainQueues (C:\Users\Binny Zupnick\Development\onefiftyone\node_modules\bluebird\js\release\async.js:17:14)
    at runCallback (timers.js:794:20)
    at tryOnImmediate (timers.js:752:5)
    at processImmediate [as _immediateCallback] (timers.js:729:5)

The Model

let Knex  = require('knex');
const knexfile = require('../../knexfile');
const { Model } = require('objection');

// Give the knex object to objection.
const knexConfig = Knex(knexfile['connection']);
Model.knex(knexConfig);


class User extends Model {
  static get tableName() {
    return 'user';
  }
}

module.exports = {
  User: User
};

Knexfile

// Update with your config settings.

function getSsl() {
  return process.env.PG_SSL !== "false";
}

function connectionStringToObject(connectionString) {
  let connectionObject = {};
  let noPostgres = connectionString.split('//')[1];
  let splitByColon = noPostgres.split(':');
  let splitByStrudel = splitByColon[1].split('@');
  let splitBySlash = splitByColon[2].split('/');

  connectionObject['user'] = splitByColon[0];
  connectionObject['host'] = splitByStrudel[1];
  connectionObject['password'] = splitByStrudel[0];
  connectionObject['database'] = splitBySlash[1];
  connectionObject['ssl'] = getSsl();

  return connectionObject;
}

let connectionString = process.env.DATABASE_URL;
let connectionObject = connectionStringToObject(connectionString);

let dbConnection = {
    client : "pg",
  connection: connectionObject,
  migrations: {
    directory: './db/migrations'
  },
  useNullAsDefault: true
};

module.exports = {
  connection: dbConnection
};