问Pytest:在测试文件中具有模块作用域的装置可以工作，但在conftest.py中抛出错误

EN

├── main.py
├── pytest.ini
├── src
│   └── tasks
│       ├── __init__.py
│       └── conftest.py
└── tests
    └── func
        └── test_authors.py

[pytest]
xfail_strict=true

import json, pytest


@pytest.fixture(scope='module')
def author_file_json(tmpdir_factory):
    python_author_data = {
        'Ned': {'City': 'Boston'},
        'Brian': {'City': 'Portland'},
        'Luciano': {'City': 'Sau Paulo'}
    }

    file = tmpdir_factory.mktemp('data').join('author_file.json')
    print('file:{}'.format(str(file)))

    with file.open('w') as f:
        json.dump(python_author_data, f)
    return file


def test_brian_in_portland(author_file_json):
    with author_file_json.open() as f:
        authors = json.load(f)
    assert authors['Brian']['City'] == 'Portland'

- but now if I run `pytest tests/test_authors.py` 
    - I get an error - `E fixture 'author_file_json' not found`