@PersistenceTest
public class MyTestClass extends Arquillian {
    @Inject private Dao dao;
    @Inject private MyBean myBean;

    @BeforeMethod
    public void cleanDB () {
        dao.remove(foo); // Currently throws NPE as dao is not injected.
    }

    @Test
    public void someTest () {
        // In a Test-method dao is available and calling cleanDB from here also
        // works as intended....
    }
}