default in hibernate.properties, the property hibernate.jdbc.use_streams_for_binary is set to true, this will cause two test case fail on DB2

org.hibernate.test.annotations.lob.LobTest.testBinary()

org.hibernate.test.annotations.entity.PropertyDefaultMappingsTest.testSerializableObject()

and note, this is a system level property, so it can not be set in the org.hibernate.test.annotations.TestCase.configure(Configuration)