unexpected element (uri:\"\", local:\"Group\"). Expected elements are <{}group>
Meet an exception when unmarshalling from xml
In case you are going crazy because this happens only in your Tests and you are using PowerMock this is the solution, add it on top of your test class:
@PowerMockIgnore({ "javax.xml.*", "org.xml.*", "org.w3c.*" })
It looks like your XML document has the root element "Group" instead of "group". You can: