diff -r 202291a280fb -r f8e531a3a77c tests/test-requires.t
--- a/tests/test-requires.t	Thu Mar 20 17:34:02 2014 -0700
+++ b/tests/test-requires.t	Wed Mar 19 00:18:30 2014 +0100
@@ -9,13 +9,13 @@
   [255]
   $ echo indoor-pool > .hg/requires
   $ hg tip
-  abort: unknown repository format: requires features 'indoor-pool' (upgrade Mercurial)!
-  (see http://mercurial.selenic.com/wiki/MissingRequirement for details)
+  abort: repository requires features unknown to this Mercurial: indoor-pool!
+  (see http://mercurial.selenic.com/wiki/MissingRequirement for more information)
   [255]
   $ echo outdoor-pool >> .hg/requires
   $ hg tip
-  abort: unknown repository format: requires features 'indoor-pool', 'outdoor-pool' (upgrade Mercurial)!
-  (see http://mercurial.selenic.com/wiki/MissingRequirement for details)
+  abort: repository requires features unknown to this Mercurial: indoor-pool outdoor-pool!
+  (see http://mercurial.selenic.com/wiki/MissingRequirement for more information)
   [255]
   $ cd ..
 
@@ -62,8 +62,8 @@
   [255]
 
   $ hg clone supported clone-dst
-  abort: unknown repository format: requires features 'featuresetup-test' (upgrade Mercurial)!
-  (see http://mercurial.selenic.com/wiki/MissingRequirement for details)
+  abort: repository requires features unknown to this Mercurial: featuresetup-test!
+  (see http://mercurial.selenic.com/wiki/MissingRequirement for more information)
   [255]
   $ hg clone --pull supported clone-dst
   abort: required features are not supported in the destination: featuresetup-test