--- a/tests/test-prev-next.t	Fri Jul 14 01:21:32 2017 +0200
+++ b/tests/test-prev-next.t	Fri Jul 14 01:32:34 2017 +0200
@@ -94,6 +94,15 @@
      mark                      2:4e26ef31f919
      no-move                   2:4e26ef31f919
 
+test prev on root
+
+  $ hg up null
+  0 files updated, 0 files merged, 2 files removed, 0 files unresolved
+  $ hg prev
+  already at repository root
+  [1]
+  $ hg up 1
+  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
 Behavior with local modification
 --------------------------------