diff --git a/contrib/revsetbenchmarks.txt b/contrib/revsetbenchmarks.txt
--- a/contrib/revsetbenchmarks.txt
+++ b/contrib/revsetbenchmarks.txt
@@ -12,3 +12,4 @@ max(tip:0)
 min(0:tip)
 0::
 min(0::)
+::p1(p1(tip))::