When using the @testing-library/react you can write jsx to test your components.
If you use:
render(<><MyComponent /><SecondComponent /></>)
You may get an error saying it can’t unmount the component.
Warning: unmountComponentAtNode(): The node you're attempting to unmount was rendered by another copy of React.
Possibly related to the
<></> not properly being a main component for a react tree. Removing or replacing this prevents the error.
render(<div><MyComponent /><SecondComponent /></div>)
There may be another way to resolve this but this works if you don’t care about the nesting div.