mockImplementationOnce() is not a function in second test suite?

I am currently testing something which uses http and I have run into something which I really can’t figure out.

The problem:
I import the http package, mock it, and then in my first test I mockImplementationOnce for it, it works fine. But when I do it in another test, it says TypeError: http.request.mockImplementationOnce is not a function.

The Code:
index.test.js

const http = require('http');

jest.mock('http');

describe('httpRequest', () => {
    // This test passes 
    test('gets response correctly', () => {
      http.request.mockImplementationOnce((opts, cb) => {
        // unrelated logic
      });

      const response = someFunctionCallingHttpRequest();

      expect(response).resolves.toBe('something')
    });

    test('handles something else correctly', () => {
      // This test throws an error here
      http.request.mockImplementationOnce((opts, cb) => {
        // unrelated logic
      });

      const response = someFunctionCallingHttpRequest();

      expect(response).resolves.toBe('something')
    });
  });

The error:
I get the following error in the second test suite

● httpRequest › handles something else correctly

TypeError: http.request.mockImplementationOnce is not a function

Any help would be really appreciated!