PHPUnit needs to be configured for every single test or class

Hello,

I have successfully configured PHPStorm and PHPUnit to run all tests at once in my project.
All tests complete without any error.

However, when I try to run a single class or test in a file, I get the message:
"Could not read "{projectPath}/api/phpunit.xml" (I masked the real path)

This path is correct, and yet it cannot be opened.
I then need to click "Modify Run Configuration" and tick the following checkboxes for that class:
- "Use alternative configuration file"
- "Use alternative bootstrap file"

The first path to phpunit.xml is the same as above. So I don't have to do anything else there.
However, the path to the bootstrap.php file is not filled in, even though I had already set it in my general settings.
So I have to select it again.

I have to select this option for each class or for each individual test in a file.
Is there any way to use my general configuration by default, so I don't have to configure this for each individual test?

Thanks in advance!

Best regards
Nick