PHPUnit Courses

Object Oriented PHP & TDD with PHPUnit from Scratch
Udemy

Getting Started with PHP Unit Testing Course (How To)
Treehouse

Unit Testing with PHPUnit
Pluralsight

PHP Unit Testing with PHPUnit
Udemy

Advance your Skills as a PHP Developer: Testing and Debugging
LinkedIn Learning

Magento 2 Testing
YouTube

Learning Symfony 3
LinkedIn Learning

PHP: Test-Driven Development with PHPUnit
LinkedIn Learning

Symfony Tutorial - Test Driven Development Full Course - Learn TDD Using PHPUnit
YouTube