Setup behat (init) a) Do not run any test. Check that in the behat dataroot you see a file called originaldatafiles.json. Check that filedir contains multiple folder (not just da folder) b) run a test. At the end of the test, check that dataroot_behat and dataroot_behat/filedir contain the same folders/files as in a). c) drop the behat database with util.php --drop. Check that originaldatafiles.json and filedir has been deleted. d) rerun init. Check that dataroot_behat and dataroot_behat/filedir contain the same folders/files as in a). Setup phpunit(init) a) Do not run any test. Check that in the phpunitdataroot you see a file called originaldatafiles.json. Check that filedir contains multiple folder (not just da folder) b) run a test. At the end of the test, check that dataroot_phpunit and dataroot_phpunit/filedir contain the same folders/files as in a). c) drop the phpunitdatabase with util.php --drop. Check that originaldatafiles.json and filedir has been deleted. d) rerun init. Check that dataroot_phpunit and dataroot_phpunit/filedir contain the same folders/files as in a). Last test a) clone a new site but don't install it. b) delete the mod/assign/feedback/editpdf plugin c) install the site d) run a behat test. It should not crash. Finally, run vendor/bin/phpunit core_test_util_testcase