PHPStorm does not break at breakpoints in phpunit using vagrant

Hi,
I'm using a vagrant installation and want to debug my unit tests. I installed Xdebug an it is running perfect with the browser.
The unit tests are also running on the vm.

Running the unit tests states:

ssh://vagrant@gw2.abs-net.de:22/usr/bin/php -dxdebug.remote_enable=1 -dxdebug.remote_mode=req -dxdebug.remote_port=9000 -dxdebug.remote_host=192.168.34.1 /home/vagrant/.phpstorm_helpers/phpunit.php --configuration /var/www/phpunit.xml
Testing started at 14:42 ...


.....


Process finished with exit code 0

The xdebug log states:

Log opened at 2015-03-05 13:42:41
I: Checking remote connect back address.
W: Remote address not found, connecting to configured address/port: 192.168.34.1:9000. :-|
I: Connected to client. :-)
-> <init xmlns="urn:debugger_protocol_v1" xmlns:xdebug="http://xdebug.org/dbgp/xdebug" fileuri="file:///home/vagrant/.phpstorm_helpers/phpunit.php" language="PHP" protocol_version="1.0" appid="20107" idekey="15620"><engine version="2.2.3"><![CDATA[Xdebug]]></engine><author><![CDATA[Derick Rethans]]></author><url><![CDATA[http://xdebug.org]]></url><copyright><![CDATA[Copyright (c) 2002-2013 by Derick Rethans]]></copyright></init>


<- feature_set -i 1 -n show_hidden -v 1
-> <response xmlns="urn:debugger_protocol_v1" xmlns:xdebug="http://xdebug.org/dbgp/xdebug" command="feature_set" transaction_id="1" feature="show_hidden" success="1"></response>


<- feature_set -i 2 -n max_depth -v 1
-> <response xmlns="urn:debugger_protocol_v1" xmlns:xdebug="http://xdebug.org/dbgp/xdebug" command="feature_set" transaction_id="2" feature="max_depth" success="1"></response>


<- feature_set -i 3 -n max_children -v 100
-> <response xmlns="urn:debugger_protocol_v1" xmlns:xdebug="http://xdebug.org/dbgp/xdebug" command="feature_set" transaction_id="3" feature="max_children" success="1"></response>


<- status -i 4
-> <response xmlns="urn:debugger_protocol_v1" xmlns:xdebug="http://xdebug.org/dbgp/xdebug" command="status" transaction_id="4" status="starting" reason="ok"></response>


<- step_into -i 5
-> <response xmlns="urn:debugger_protocol_v1" xmlns:xdebug="http://xdebug.org/dbgp/xdebug" command="step_into" transaction_id="5" status="break" reason="ok"><xdebug:message filename="file:///home/vagrant/.phpstorm_helpers/phpunit.php" lineno="4"></xdebug:message></response>


<- stack_get -i 6
-> <response xmlns="urn:debugger_protocol_v1" xmlns:xdebug="http://xdebug.org/dbgp/xdebug" command="stack_get" transaction_id="6"><stack where="{main}" level="0" type="file" filename="file:///home/vagrant/.phpstorm_helpers/phpunit.php" lineno="4"></stack></response>


<- run -i 7
-> <response xmlns="urn:debugger_protocol_v1" xmlns:xdebug="http://xdebug.org/dbgp/xdebug" command="run" transaction_id="7" status="stopping" reason="ok"></response>


<- run -i 8
Log closed at 2015-03-05 13:42:41

Everything seems to be fine. But PHPStorm nevert stops at its breakpoints and I can not figure out why?

Environment:
Mac Yosemite
XDebug 2.2.3 (I also tried new newest one, without effect)
PHPUnit 4.5.0
PHPStorm 8.0.3

May be someone has any ideas about this .. ;)

Volker