--- a/cubicweb/devtools/fake.py	Fri Sep 30 17:36:02 2016 +0200
+++ b/cubicweb/devtools/fake.py	Fri Sep 30 17:36:40 2016 +0200
@@ -169,10 +169,11 @@
     def running_hooks_ops(self):
         yield
 
+
 class FakeRepo(object):
     querier = None
+
     def __init__(self, schema, vreg=None, config=None):
-        self.extids = {}
         self.eids = {}
         self._count = 0
         self.schema = schema
@@ -183,20 +184,6 @@
     def internal_session(self):
         return FakeSession(self)
 
-    def extid2eid(self, source, extid, etype, cnx, insert=True):
-        try:
-            return self.extids[extid]
-        except KeyError:
-            if not insert:
-                return None
-            self._count += 1
-            eid = self._count
-            entity = source.before_entity_insertion(cnx, extid, etype, eid)
-            self.extids[extid] = eid
-            self.eids[eid] = extid
-            source.after_entity_insertion(cnx, extid, entity)
-            return eid
-
 
 class FakeSource(object):
     dbhelper = get_db_helper('sqlite')