PHPUnit displays 'terminated' if any warning/error is present.

I may be totally missing the point as this is my first time trying TDD and not only on PHPStorm.

I create a class, create a test via context menu, and it works if I do something trivial like
      $this->assertEquals(1,1,'not equal');

However if the code contains warnings or errors, I just receive
     Process finished with exit code 255
and status 'Terminated' everywhere.

How am I to see the actual warnings the code produces?

I'm running win7, EAP 102.*, php 5.3.*, PHPUnit 3.5, IOW, everything's up to date.