KeyError: 'Spider not found: test'

  File "c:\python36\lib\site-packages\scrapy\cmdline.py", line 157, in _run_command
    cmd.run(args, opts)
  File "c:\python36\lib\site-packages\scrapy\commands\crawl.py", line 57, in run
    self.crawler_process.crawl(spname, **opts.spargs)
  File "c:\python36\lib\site-packages\scrapy\crawler.py", line 170, in crawl
    crawler = self.create_crawler(crawler_or_spidercls)
  File "c:\python36\lib\site-packages\scrapy\crawler.py", line 198, in create_crawler
    return self._create_crawler(crawler_or_spidercls)
  File "c:\python36\lib\site-packages\scrapy\crawler.py", line 202, in _create_crawler
    spidercls = self.spider_loader.load(spidercls)
  File "c:\python36\lib\site-packages\scrapy\spiderloader.py", line 71, in load
    raise KeyError("Spider not found: {}".format(spider_name))
KeyError: ‘Spider not found: test‘