stopOnError xml config does not work

[arunjusrut]

stopOnError="true" does not seem to work (all tests are run, even if an error occurs), but --stop-on-error switch works fine.

Here's the relevant part of my config:

<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:noNamespaceSchemaLocation="http://schema.phpunit.de/4.2/phpunit.xsd"
         bootstrap="bootstrap.php"
         backupGlobals="false"
         backupStaticAttributes="false"
         stopOnError="true"
         convertErrorsToExceptions="false"
         convertNoticesToExceptions="false"
         convertWarningsToExceptions="false">