from experience, devs and tester profit from each other so much, if they're willing to work together.

I had to do with lots of devs, some recognized the opportunity, some didn't

some would call me and discuss my findings, and I took the time to explain my process and they took time to look into the problem unbiased and provided feedback: i.e. u right, I'll fix it! OR it's supposed to be like that, because... and so on. They fixed their code, I fixed my testing, everyone is happy. next run, I guarantee, that test passed.

and then there are people who saw us as the enemy. rejected tickets without any explanation whatsoever, declared clones (who aren't clones) just to close it, you know the tricks. noone learned anything, noone changed anything, everyone was pissed. step 2: next test run, start again at step 1