At least compared to our internal digital security group would couldn't fathom, "your test is wrong for how this app is configured, that path leads to a different app and default behavior" it's not actually a failure... to a canned test for a php exploit. The app wasn't php, it was an SPA and always delivered the same default page unless in the /auth/* route.
After that my response became, show me an actual exploit with an actual data leak you can show me and I'll update my code instead of your test.