--- a/tests/test-import-bypass.t	Mon Sep 05 08:29:36 2016 +0000
+++ b/tests/test-import-bypass.t	Fri Aug 26 12:48:20 2016 +0200
@@ -41,6 +41,7 @@
   $ hg import --bypass ../test.diff
   applying ../test.diff
   unable to find 'a' for patching
+  (use '--prefix' to apply patch relative to the current directory)
   abort: patch failed to apply
   [255]
   $ hg st