嗨，我在Travis CI上遇到问题，不确定如何解决。我有一个烧瓶应用程序，正在使用Travis CI来管理自动化测试。下面列出了我的.travis.yaml以及我收到的错误。我该怎么办才能解决此问题？
# specify language
language:
- python
# specify pyth0n version(s)
python:
- "3.7"
# install dependencies
install:
- pip install -r requirements.txt
# run tests
script:
- pytest
0.20s$ rake
188rake aborted!
189No Rakefile found (looking for: rakefile, Rakefile, rakefile.rb, Rakefile.rb)
190/home/travis/.rvm/gems/ruby-2.5.3@global/gems/rake-12.3.2/exe/rake:27:in `<top (required)>'
191/home/travis/.rvm/gems/ruby-2.5.3@global/bin/ruby_executable_hooks:24:in `eval'
192/home/travis/.rvm/gems/ruby-2.5.3@global/bin/ruby_executable_hooks:24:in `<main>'
193(See full trace by running task with --trace)
194The command "rake" exited with 1.