--- a/tests/test-cat.t	Thu Apr 09 22:18:55 2015 +0900
+++ b/tests/test-cat.t	Sun Apr 05 13:16:46 2015 +0900
@@ -63,3 +63,8 @@
   tmp/h_45116003780e
   tmp/r_2
 
+Test working directory
+
+  $ echo b-wdir > b
+  $ hg cat -r 'wdir()' b
+  b-wdir