How to integratei sequelize in nodeunit test - node.js

Question

I have an express-sequelize application, it uses nodeunit to test routes and for this I use the wonderfull nodeunit-express module.
All works fine, except sequelize creating the database. In my express app I do a sequelize.sync({force: true}) during the start.
My tests do work when I run
npm start (node server.js)
first, followed by
npm test (nodeunit test)
But when the database is not present and I run
npm test (nodeunit test)
Alone, the is not created errors.
Where in the nodeunit testing process should I place the sync sequelize to have it available for my tests?
var request = require('nodeunit-express');
var server = require('../server');
var models = require('../models');
var express = request(server.app);
exports["Rest interfaces"] = {
setUp: function (callback) {
//insert some stuff in the database?
callback();
},
tearDown: function (callback) {
callback();
//cleanup();
},
"/api/categories": function (test) {
express.get('/api/categories').expect(function (response) {
// response is the response from hitting '/'
var result = JSON.parse(response.body);
test.equal(response.statusCode, 200, '/api/categories is not available');
test.equal(result.length, 0, 'no categories should be returned');
test.done();
});
}
};
function cleanup() {
//wait a little
setTimeout(function () {
express.close();
}, 500);
}