i need to send this to all my coworkers. i wrote some tests kind of similar to this, except i had a bunch of setup code then asserted something was true, change

i need to send this to all my coworkers. i wrote some tests kind of similar to this, except i had a bunch of setup code then asserted something was true, changed 1 thing and then verified it became false so that it was super clear that it was the 1 thing that causes it to become false. they were like no, copy paste the entire setup and change the field to false in the new setup. im like how are you supposed to tell which of the dozen conditions triggered it now? you have to diff the 2 tests in your head and hope they don't get out of sync? ridiculous