How to update the mock of an import in a test?

[charklewis]

I am unsussesscful in being able to update a mock during a test. If I have the following tests:

import { signIn } from "./my-module"

vi.mock("./my-module", () => {
  return {
    signIn: vi.fn(),
  }
})

test("sign in fails", async () => {
  signIn.mockRejectedValue("not-allowed")
  const data = await doMySignInAction()
  expect(data.success).toBe(false)
})

It doesn't seem to work. Is there a way I can do this?