diff -r a570191d67b0 -r 2fcb53ee5178 cubicweb/hooks/test/data/hooks.py
--- a/cubicweb/hooks/test/data/hooks.py	Tue Oct 09 16:24:12 2018 +0200
+++ b/cubicweb/hooks/test/data/hooks.py	Mon Oct 29 10:04:31 2018 +0100
@@ -3,6 +3,6 @@
 
 
 class FolderUpdateHook(notification.EntityUpdateHook):
-    __select__ = (notification.EntityUpdateHook.__select__ &
-                  is_instance('Folder'))
+    __select__ = (notification.EntityUpdateHook.__select__
+                  & is_instance('Folder'))
     order = 100  # late trigger so that metadata hooks come before.