In Seam 1.2 and earlier we used Embedded EJB3, now we use Embedded JBoss, two different projects. These are the instructions that I wrote for using the Eclipse TestNG plugin which you may find useful: anonymous wrote : If you want to run tests using the Eclipse TestNG plugin, you'll need to add | these jars to the top of your TestNG classpath. Using the Run Dialog, select | xml suite to run, and add /lib/test/jboss-embedded-all.jar, | /lib/test/hibernate-all.jar, /lib/test/thirdparty-all.jar, /lib/embedded-api.jar, | /lib/jboss-deployers.jar and /bootstrap as the first entries in the User | classpath. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4100141#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...