google-calendar sinon stub doesn't seem to work

In my calendar.spec.js, I have:

before(() => {
    sinon.stub(googleCalendar.calendarList, 'list').resolves({ data: true })
})

after(() => {
    googleCalendar.calendarList.list.restore()
})

In my calendar.js, I have:

                let { data } = await googleCalendar.calendarList.list({
                    auth: oauth2Client
                })

But it doesn't appear to be stubbed. It goes ahead and tries to connect to Google Calendar. What am I doing wrong?

from google-calendar sinon stub doesn't seem to work