When regression script is asking for confirmation (https://github.com/ezsystems/BehatBundle/blob/master/bin/.travis/trigger_ci.sh#L137) it reads the first character and proceeds with the rest of the script.

If the user enters more charactes (for example: yes) then the last two letters are treated as input for next text fields (username/password), which breaks the script.

We should change the confirmation dialog so that in waits until user confirms his choice by clicking "Enter".