[ZeroGravitas]

Is a comprehensive test suite for PHP a byproduct if this?

Last time I checked PHPs own tests only had about 30% coverage, and with a famously idiosyncratic language like PHP, which apparently needs a massive internal overhaul to increase speed, that seems less than optimal.

I thought the test suite was one of the best things to come our of multiple ruby implementations, though I read recently that core Ruby ignore it and so regularly introduce bugs that it would catch.