The Problem is within a abstract class that contains @EJB annotation.
When a testcase extens that abstract class the Beans will not be injected.

Here is a example code:

@RunWith(Arquillian.class)
public abstract class AbstractTestContext
{
@EJB
protected BeanOne beanOne;

@EJB
protected BeanTwo beanTwo;

@Deployment
public static JavaArchive getContextDeployment()

{ return ShrinkWrap.create(JavaArchive.class, "test.jar") .addPackages(true, RootClass.class.getPackage()) .addManifestResource("persistence.xml"); }

}

public class MyTest extends AbstractTestContext
{
@Test
public void testBeanOne()

{ Assert.assertNotNull(beanOne); }

@Test
public void testBeanOne()
{ Assert.assertNotNull(beanOne); }

}

After searching the Arquillian code i found the code for my problem in the TestEnricher API.