Overwritting PHPUnit test files with updated ones in NetBeans

Question

Hello, Using NetBeans 6.9.1, when I update my source files with additional unit tests for PHPUnit, I always have to delete the old PHPUnit test files and generate new ones. If I choose to generate without deleting them, generation will fail and the old files won't be updated. Is there a "smart" way to force NetBeans to automatically overwrite those files when performing "Create PHPUnit Tests" command?

Thank you.