title: Jest No Tests found
body: <p>running docker mhart/alpine-node:8 on macOS with</p>
  
  <blockquote>
    <p>nodejs (6.10.3-r0) (18/18) 
    yarn 0.24.6
    jest 20.0.4</p>
  </blockquote>
  
  <p>I have a __tests__/index.test.js file however, when running the code</p>
  
  <p><code>node_modules/.bin/jest --watchAll</code> I get the below output</p>
  
  <blockquote>
    <p>No tests found<br>
    In /usr/src/app<br>
    5 files checked.<br>
    testMatch: <strong>/__tests__/</strong>/*.js?(x),**/?(*.)(spec|test).js?(x) - 1 match<br>
    testPathIgnorePatterns: /node_modules/,/src,<strong>src</strong> - 0 matches<br>
    Pattern: "" - 0 matches</p>
  </blockquote>
  
  <p>I've re-installed the package numbers times but to no avail.</p>