Some of the test cases were failing due to the busted (relative) import.
This fixes some of the failures, but there are still more.
diff --git a/Lib/xmlcore/etree/ElementInclude.py b/Lib/xmlcore/etree/ElementInclude.py
index 974cc21..d7f85b3 100644
--- a/Lib/xmlcore/etree/ElementInclude.py
+++ b/Lib/xmlcore/etree/ElementInclude.py
@@ -49,7 +49,7 @@
 ##
 
 import copy
-import ElementTree
+from . import ElementTree
 
 XINCLUDE = "{http://www.w3.org/2001/XInclude}"