<p dir="auto">Hello,</p>
<p dir="auto">Following <a href="https://reactjs.org/docs/how-to-contribute.html#sending-a-pull-request" rel="nofollow">your documentation</a></p>
<p dir="auto">I made a fresh install and the test are failing even before doing any modification to the repository</p>
<p dir="auto">React version:</p>
<p dir="auto">The one on master branch<br>
commit: <a class="commit-link" data-hovercard-type="commit" data-hovercard-url="https://github.com/facebook/react/commit/a731a51696239a69a6cd89cdd34f23ce2fc39099/hovercard" href="https://github.com/facebook/react/commit/a731a51696239a69a6cd89cdd34f23ce2fc39099"><tt>a731a51</tt></a><br>
Ubuntu LTS<br>
Node v14.16.1</p>
<h2 dir="auto">Steps To Reproduce</h2>
<ol dir="auto">
<li>git clone <a href="https://github.com/facebook/react.git">https://github.com/facebook/react.git</a></li>
<li>yarn install</li>
<li>yarn test</li>
</ol>
<p dir="auto">Link to code example:<br>
I did not do anything yet and I received 3 errors :</p>
<p dir="auto"><a target="_blank" rel="noopener noreferrer nofollow" href="https://user-images.githubusercontent.com/5208910/119251901-abd49600-bbdb-11eb-98f1-d390db8bbead.png"><img src="https://user-images.githubusercontent.com/5208910/119251901-abd49600-bbdb-11eb-98f1-d390db8bbead.png" alt="Screenshot from 2021-05-22 23-05-59" style="max-width: 100%;"></a><br>
<a target="_blank" rel="noopener noreferrer nofollow" href="https://user-images.githubusercontent.com/5208910/119251902-ad9e5980-bbdb-11eb-98d8-623867eb80bf.png"><img src="https://user-images.githubusercontent.com/5208910/119251902-ad9e5980-bbdb-11eb-98d8-623867eb80bf.png" alt="Screenshot from 2021-05-22 23-06-17" style="max-width: 100%;"></a><br>
<a target="_blank" rel="noopener noreferrer nofollow" href="https://user-images.githubusercontent.com/5208910/119251903-ae36f000-bbdb-11eb-9b5f-b60453f4530b.png"><img src="https://user-images.githubusercontent.com/5208910/119251903-ae36f000-bbdb-11eb-9b5f-b60453f4530b.png" alt="Screenshot from 2021-05-22 23-06-21" style="max-width: 100%;"></a><br>
<a target="_blank" rel="noopener noreferrer nofollow" href="https://user-images.githubusercontent.com/5208910/119251904-aecf8680-bbdb-11eb-9918-e848ffe22728.png"><img src="https://user-images.githubusercontent.com/5208910/119251904-aecf8680-bbdb-11eb-9918-e848ffe22728.png" alt="Screenshot from 2021-05-22 23-06-24" style="max-width: 100%;"></a></p>
<h2 dir="auto">The current behavior</h2>
<p dir="auto">The tests are failing</p>
<h2 dir="auto">The expected behavior</h2>
<p dir="auto">The tests should pass after a fresh install</p>
<h3 dir="auto">Which website or app were you using when the bug happened?</h3>
<p dir="auto">Please provide a link to the URL of the website (if it is public), a CodeSandbox (<a href="https://codesandbox.io/s/new" rel="nofollow">https://codesandbox.io/s/new</a>) example that reproduces the bug, or a project on GitHub that we can checkout and run locally.</p>
<h3 dir="auto">What were you doing on the website or app when the bug happened?</h3>
<p dir="auto">If possible, please describe how to reproduce this bug on the website or app mentioned above:</p>
<ol dir="auto">
<li>

</li>
<li>

</li>
<li>

</li>
</ol>



<h3 dir="auto">Generated information</h3>
<p dir="auto">DevTools version: 4.13.1-93782cfed2</p>
<p dir="auto">Call stack:<br>
at chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:21390:41<br>
at bridge_Bridge.emit (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:19607:22)<br>
at chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:19767:12<br>
at listener (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:37788:39)</p>
<p dir="auto">Component stack:<br>
(none)</p>
<p dir="auto">GitHub URL search query:<br>
<a href="https://api.github.com/search/issues?q=Cannot%20add%20node%20%20because%20a%20node%20with%20that%20id%20is%20already%20in%20the%20Store.%20in%3Atitle%20is%3Aissue%20is%3Aopen%20is%3Apublic%20label%3A%22Component%3A%20Developer%20Tools%22%20repo%3Afacebook%2Freact">https://api.github.com/search/issues?q=Cannot%20add%20node%20%20because%20a%20node%20with%20that%20id%20is%20already%20in%20the%20Store.%20in%3Atitle%20is%3Aissue%20is%3Aopen%20is%3Apublic%20label%3A%22Component%3A%20Developer%20Tools%22%20repo%3Afacebook%2Freact</a></p>