--- a/tests/test-revset.t	Tue Feb 23 21:38:36 2016 +0000
+++ b/tests/test-revset.t	Wed Feb 24 10:41:15 2016 -0800
@@ -693,12 +693,11 @@
   * optimized:
   (func
     ('symbol', 'only')
-    (and
+    (difference
       (range
         ('symbol', '8')
         ('symbol', '9'))
-      (not
-        ('symbol', '8'))))
+      ('symbol', '8')))
   * set:
   <baseset+ [8, 9]>
   8