EJB 3 Core Specification Section 4.6.8: The return type for a create<METHOD> method must be the session bean's remote interface type.

EJB 3 Core Specification Section 4.6.10: The return type for a create<METHOD> method must be the session bean's local interface type.

Using the proxy as if it would be an EJBObject/EJBLocalObject results in class cast exceptions.

java.lang.ClassCastException: $Proxy9
at org.jboss.ejb3.test.stateful.unit.RemoteUnitTestCase.testEJBObject(RemoteUnitTestCase.java:208)
at junit.extensions.TestDecorator.basicRun(TestDecorator.java:22)
at junit.extensions.TestSetup$1.protect(TestSetup.java:19)
at junit.extensions.TestSetup.run(TestSetup.java:23)