Anybody have experience where every single test always succeeds?

I've noticed some departments in my company always report every single A/B test as succeeding and driving an additional $X revenue. I've managed A/B testing frameworks in the past, and it's highly unlikely every single test is a success. Some are flat. Some show a worse outcome. That's why you test. I've been here a few years now and have yet to see any test from this department either coming in flat or underperforming the control.

Also, their results aren't …

a/b testing b testing datascience driving experience frameworks managed report revenue show success test testing