React Apollo Error: No more mocked responses for the query: mutation

Intended outcome:

MockedProvider should mock my createPost mutation.

Actual outcome:

Error: No more mocked responses for the query: mutation...

How to reproduce the issue:

I have a very simple repository. I also created a separate branch with example commit which is breaking the apollo mock provider.

1) Mutation definition is here: https://github.com/developer239/react-apollo-graphql/blob/create-post-integration-tests/src/modules/blog/gql.js#L23

export const CREATE_POST = gql`
  mutation createPost($title: String!, $text: String!) {
    createPost(title: $title, text: $text) {
      id
      title
      text
    }
  }
`

2) The fake request is here: https://github.com/developer239/react-apollo-graphql/blob/create-post-integration-tests/test/utils/gql-posts.js#L68

export const fakeCreatePostSuccess = {
  request: {
    query: CREATE_POST,
    variables: {
      title: 'Mock Title',
      text: 'Mock lorem ipsum text. And another paragraph.',
    }
  },
  result: {
    data: {
      createPost: {
        id: '1',
        title: 'Mock Title',
        text: 'Mock lorem ipsum text. And another paragraph.',
      },
    },
  },

3) The component that I am testing lives here: https://github.com/developer239/react-apollo-graphql/blob/create-post-integration-tests/src/pages/Blog/PostCreate/index.js#L24

    <Mutation
      mutation={CREATE_POST}
      update={updatePostCache}
      onCompleted={({ createPost: { id } }) => push(`/posts/${id}`)}
    >
      {mutate => (
        <>
          <H2>Create New Post</H2>
          <PostForm submit={values => mutate({ variables: values })} />
        </>
      )}
    </Mutation>

4) The failing test case lives here: https://github.com/developer239/react-apollo-graphql/blob/create-post-integration-tests/src/pages/Blog/PostCreate/index.test.js#L33

  describe('on form submit', () => {
    it('should handle success', async () => {
      const renderer = renderApp(<App />, ROUTE_PATHS.createPost, [
        fakeCreatePostSuccess,
      ])
      const { formSubmitButton } = fillCreatePostForm(renderer)
      fireEvent.click(formSubmitButton)
      await waitForElement(() => renderer.getByTestId(POST_DETAIL_TEST_ID))
      expect(renderer.getByTestId(POST_DETAIL_TEST_ID)).toBeTruthy()
    })
  })

It seems that I followed all steps from the official documentation but I still can't make this work. Do you have any suggestions? 🙂