Test suite failing?

[jasonrudolph]

I cloned this repository locally to investigate possible fixes to some of the open issues, and I discovered that three of the tests are failing for me:

$ node --version
v10.10.0

$ npm --version
6.4.1

$ npm i && npm test

> probot-no-response@1.0.0 test /Users/j/github/no-response
> mocha && standard

  NoResponse
    sweep
      1) creates a responseRequiredLabel if one does not exist
      2) does not create a responseRequiredLabel if it already exists
      3) searches for matching issues
    close
      when perform is set to false
        ✓ logs that this is a dry run
        ✓ does not close the issue
        ✓ does not post a comment
      when perform is set to true and there is no close comment
        ✓ logs that the issue is being closed
        ✓ closes the issue
        ✓ does not post a comment
      when perform is set to true and a close comment is included
        ✓ logs that the issue is being closed
        ✓ closes the issue
        ✓ posts a comment

  9 passing (10ms)
  3 failing

  1) NoResponse
       sweep
         creates a responseRequiredLabel if one does not exist:
     TypeError: Cannot read property 'slice' of undefined
      at Function.fromArray (node_modules/scramjet-core/lib/data-stream.js:574:19)
      at Object.fromArray (node_modules/scramjet-core/lib/index.js:39:32)
      at NoResponse.getClosableIssues (lib/no-response.js:76:37)

  2) NoResponse
       sweep
         does not create a responseRequiredLabel if it already exists:
     TypeError: Cannot read property 'slice' of undefined
      at Function.fromArray (node_modules/scramjet-core/lib/data-stream.js:574:19)
      at Object.fromArray (node_modules/scramjet-core/lib/index.js:39:32)
      at NoResponse.getClosableIssues (lib/no-response.js:76:37)

  3) NoResponse
       sweep
         searches for matching issues:
     TypeError: Cannot read property 'slice' of undefined
      at Function.fromArray (node_modules/scramjet-core/lib/data-stream.js:574:19)
      at Object.fromArray (node_modules/scramjet-core/lib/index.js:39:32)
      at NoResponse.getClosableIssues (lib/no-response.js:76:37)

npm ERR! Test failed.  See above for more details.

I also tried with Node 7 and Node 8 to see if the failures are possibly due to newer version of Node than the minimum version specified in package.json, but I got the same results with those other versions of Node.

Are these known failures, or is there perhaps additional setup that is required to run the test suite?