[webkit-dev] How to deal with 1-pixel differences in reftests ?

[Darin Adler]

> On Nov 18, 2015, at 4:36 AM, Carlos Alberto Lopez Perez <clopez at igalia.com> wrote:
> 
> Some reference tests give a 1-pixel or very few pixel differences [1].

Why? We need to understand why.

> Should we tolerate a few pixel differences for reftests ?

I don’t think we should. I think we should look more deeply into why these differences exist and consider writing the reference tests differently. We should not add tolerance when we don’t yet know why the results are different.

— Darin