node-mongodb-fixtures is not working with mongodb version 4

I am upgrading mongodb version from 3.14.4 to 4.0 I have upgraded node-mongodb-fixtures from 2.2.1 to 3.0.0 as well.

const fixture = new Fixtures({
                dir: 'fixtures/all',
                mute: true
            });
fixture.connect("mongodb://localhost:27017/testDb")
.then(() => fixture.unload())
.then(() => fixture.load())
.then(() => fixture.disconnect())

getting this error mongodb database name must be a string

#node-js #mongodb