Manual visual testing of graphical user interfaces is error prone as users perform regression tests with unclear expectations based on their visual memory, looking for impressions of things going wrong or right; more thorough testing that delves deeper can provide higher rewards by confronting issues.

1. Quality Assurance to verify that a Graphical User Interface appears correctly to users
From Continuous Delivery to Continuous deployment
Manual Visual Testing is Error Prone

2. Users are doing regression tests with unclear expectations.
Watching them perform gives some indications that their representation system is
Visually Remembered.
Listing to them indicates that they are looking for an impression of things going wrong
or right.

3. Don’t stop there.
The deeper you go with your tests, the higher the reward.
Go into that cave and fight your inner graphical daemons.