OK, I resolved this mystery. The unit test should look like this: | public class MyTest extends SeamTest { | | private EntityManagerFactory emf; | | @Test | public void testFindByUsername() { | emf = Persistence.createEntityManagerFactory("ezapp"); | | EntityManager em = emf.createEntityManager(); | em.getTransaction().begin(); | | //... | | em.getTransaction().rollback(); | em.close(); | | emf.close(); | } | | } | The problem was with | @BeforeClass | public void init() { | emf = Persistence.createEntityManagerFactory("project_name"); | } | It seems that createEntityManagerFactory is called before JBoss Embedded is initialized. Is it bug? In the reference book there is an example of unit test with BeforeClass. Regards Jarek View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4117390#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...