Failed: "TypeError: (0 , _css.default) is not a function"

I run a test with jest and relay-test-utils and take this error
The error is pointed out in the call `resolveMostRecentOperation`

`Test`
```
import React from 'react';
import { render, cleanup } from '@testing-library/react';
import { createMockEnvironment, MockPayloadGenerator } from 'relay-test-utils';
import UserListDefault from '../UserList';
import Environment from '../relay/Environment';

const env = createMockEnvironment();
let UserListRenderer;

beforeEach(() => {
Environment.environment = env;
UserListRenderer = render();
UserListRenderer.debug();
});

afterEach(cleanup);

describe('', () => {
it('should resolve query but no data', async () => {
env.mock.resolveMostRecentOperation((operation) =>
MockPayloadGenerator.generate(operation),
);

expect(UserListRenderer.baseElement).toMatchSnapshot();
});
});
```

relay-test-utils: 5.0.0,
react-relay: 5.0.0,

Start with the shown Jest test, especially the call to resolveMostRecentOperation, and reproduce it using relay-test-utils 5.0.0 and react-relay 5.0.0. Trace the reported TypeError from that call into the UserList and relay/Environment imports; done means the operation resolves without the TypeError and the snapshot assertion can run.

Written by the indexing model from the issue text.