MDL-60611, to get phpunit 6 support to Moodle 3.4 and up... one of the things detected is that we have a good number of "risky" (without assertions") tests in codebase.
We have them not being reported using beStrictAboutTestsThatDoNotTestAnything="false" in phpunit.xml, but ideally we should not have tests of this type.
1) if they are empty should be deleted.
2) if they are not tests, but support stuff, should be renamed or moved.
So, this is about:
a) detect all the risky tests we have
b) try to kill them, so we can go to the default "beStrict=true"