Arquillian throws OutOfMemoryError: PermGen space after deploying several big wars on JBoss 7

Here's the proof (that build is saved forever):
https://hudson.qa.jboss.com/hudson/view/Drools%20jBPM/job/guvnor/1161/console
Our war is apparently so big, that the 3th deployment fails with PermGen.

A few tests later it even hangs forever (until it times out)

10:41:56,393 ERROR [org.apache.catalina.core.ContainerBase.[jboss.web].[default-host].[/dc25ad71-9358-412e-8a90-c4471cb3422f].[ArquillianServletRunner]] (http--127.0.0.1-8080-2) Servlet.service() for servlet ArquillianServletRunner threw exception: java.lang.OutOfMemoryError: PermGen space

How to reproduce?
=================

git clone git@github.com:droolsjbpm/guvnor.git guvnor
cd guvnor
mvn clean install -DskipTests
cd guvnor-webapp
gedit src/test/resources/arquillian.xml
// remove the maxTestClassesBeforeRestart property
mvn test

Using arquillian 1.0.0.CR5 and jboss 7.0.2.

Workaround: use maxTestClassesBeforeRestart = 1.