Failing tests when running locally

[JonPurvis]

The following tests are currently failing when running the test suite locally:

• Tests\Feature\Http\Livewire\SubmitYouTubeLiveStreamTest > it shows a success message with full youtube url too
• Tests\Feature\Http\Livewire\SubmitYouTubeLiveStreamTest > it clears out the form after submission
• Tests\Feature\Http\Livewire\SubmitYouTubeLiveStreamTest > it shows a success message

With the following error:

An email must have a "From" or a "Sender" header.

Possibly due to Symfony Mailer being updated? I think we can specify a value in the phpunit.xml file for this.