@Test
@FixFor("MODE-1963")
public void shouldAllowReRegistrationOfMixinViaTemplate() throws Exception {

    session.getWorkspace().getNamespaceRegistry().registerNamespace("dmsmix", "http://myexample.com/dms");
    String mixinName = "dmsmix:test";
    registerMixin(mixinName);
    nodeTypeMgr.unregisterNodeType(mixinName);
    registerMixin(mixinName);
}