PHPUnit Courses
International PHP Conference via YouTube My Debugging and Performance Toolbox
PHP UK Conference via YouTube Andre's Larabits
Laracasts PHPUnit: Integration Testing with Live Services
SymfonyCasts PHPUnit: Unit Testing with a Bite!
SymfonyCasts SymfonyCon 2019 Amsterdam Conference Videos
SymfonyCasts phpspec: Testing... *Designing* with a Bite
SymfonyCasts PHPUnit (Legacy): Testing with a Bite
SymfonyCasts RESTful APIs in the Real World Course 1
SymfonyCasts PHP Unit Testing
Pluralsight