Jest "mockResolvedValue" doesn't work with custom module?

square.js

const multiply = require("./multiply");

const square = (n) => multiply(n, n);

module.exports = square;

multiply.js

const multiply = (x, y) => x * y;

module.exports = multiply;

square.test.js

const multiply = require("./multiply");
const square = require("./square");

jest.mock("./multiply");

test("square of 3 should be 9", () => {
  multiply.mockResolvedValue(9);
  expect(square(3)).toBe(9);
});

In the above test, I get the error: Expected: 9, Received: {}

I don't understand why this doesn't work, it works with axios and this also works if I replace mockResolvedValue with mockImplementation like this: multiply.mockImplementation(n => 9)

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