Tests failing randomly

[mrrobot47]

Tests are currently failing randomly, need to debug this issue.

There are scenarios where it is passing and then randomly failing. For example:
Passed test: https://travis-ci.org/EasyEngine/easyengine/builds/433394695?utm_source=github_status&utm_medium=notification
Failed test: https://travis-ci.org/EasyEngine/easyengine/builds/434077615?utm_source=github_status&utm_medium=notification

The Exception in redis cache test site is randomly occurring, it is giving HTTP code 302 instead of 200 OK. This could be happening due to multisite installations in the tests.

The generated exception:

Unable to find HTTP/1.1 200 OK
      Actual output is : HTTP/1.1 302 Found
      Server: nginx
      Date: Fri, 28 Sep 2018 09:18:55 GMT
      Content-Type: text/html; charset=UTF-8
      Connection: keep-alive
      X-Powered-By: PHP/7.2.9
      Location: http://wpsubdom.test/wp-signup.php?new=wpcache.test
      X-SRCache-Fetch-Status: MISS
      X-SRCache-Store-Status: BYPASS
      X-Powered-By: EasyEngine
      
       (Exception)