title: Vue/Vuetify Testing ~ Cannot read property 'componentInstance' of null
body: <p>I am testing a Vue / Vuetify Application.</p>
  
  <p>Here is the repo: <a href="https://github.com/buys-fran/vue-form-test" rel="nofollow noreferrer">https://github.com/buys-fran/vue-form-test</a></p>
  
  <p>I have one test suite with two tests.</p>
  
  <ul>
  <li>When I run one test only (either one) the test passes.</li>
  <li>When I run both tests it breaks and I get "TypeError: Cannot read property 'componentInstance' of null"</li>
  </ul>
  
  <p>I am testing a component with a v-form (<a href="https://vuetifyjs.com/en/components/forms#form" rel="nofollow noreferrer">Vuetify</a>).</p>
  
  <ul>
  <li>When I use <code>&lt;v-form :value="valid"&gt;</code> the test passes.</li>
  <li>When I use <code>&lt;v-form v-model="valid"&gt;</code> it breaks and I get "TypeError: Cannot read property 'componentInstance' of null"</li>
  </ul>
  
  <p>I don't know where to start looking - any help will be greatly appreciated.</p>
  
  <p>Context</p>
  
  <ol>
  <li>Testing with <a href="https://vue-test-utils.vuejs.org/" rel="nofollow noreferrer">Vue Test Utils</a></li>
  <li>Using <a href="https://jestjs.io/docs/en/getting-started.html" rel="nofollow noreferrer">Jest</a></li>
  </ol>