运行测试报错 ModuleNotFoundError: No module named 'tests.settings'

[qianmulin]

我是把包下载下来，然后执行 scrapy crawl test 命令，会报以下错误：

\ScrapyRedisBloomFilter-master\tests> scrapy crawl test
Traceback (most recent call last):
  File "c:\programdata\anaconda3\lib\runpy.py", line 194, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "c:\programdata\anaconda3\lib\runpy.py", line 87, in _run_code
    exec(code, run_globals)
  File "C:\ProgramData\Anaconda3\Scripts\scrapy.exe\__main__.py", line 7, in <module>
  File "c:\programdata\anaconda3\lib\site-packages\scrapy\cmdline.py", line 114, in execute
    settings = get_project_settings()
  File "c:\programdata\anaconda3\lib\site-packages\scrapy\utils\project.py", line 69, in get_project_settings
    settings.setmodule(settings_module_path, priority='project')
  File "c:\programdata\anaconda3\lib\site-packages\scrapy\settings\__init__.py", line 287, in setmodule
    module = import_module(module)
  File "c:\programdata\anaconda3\lib\importlib\__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
  File "<frozen importlib._bootstrap>", line 991, in _find_and_load
  File "<frozen importlib._bootstrap>", line 973, in _find_and_load_unlocked
ModuleNotFoundError: No module named 'tests.settings'

目录如下：

│  .gitignore
│  README.md
│  requirements.txt
│  setup.py
│
├─scrapy_redis_bloomfilter
│      bloomfilter.py
│      defaults.py
│      dupefilter.py
│      scheduler.py
│      __init__.py
│      __version__.py
│
└─tests
    │  scrapy.cfg
    │
    └─tests
        │  items.py
        │  middlewares.py
        │  pipelines.py
        │  settings.py
        │  __init__.py
        │
        └─spiders
                test.py
                __init__.py
                test.py
                __init__.py

为什么呢？