--- a/tests/test-evolve-abort-orphan.t	Sat Dec 01 16:08:42 2018 +0800
+++ b/tests/test-evolve-abort-orphan.t	Tue Dec 04 13:33:51 2018 +0100
@@ -554,3 +554,4 @@
   undo.branch
   undo.desc
   undo.dirstate
+  wcache