diff -r 5daf1a8c5f1d -r 8f244b75cc5e tests/test-check-config.t
--- a/tests/test-check-config.t	Fri Feb 05 22:32:05 2016 +0900
+++ b/tests/test-check-config.t	Fri Feb 05 22:32:05 2016 +0900
@@ -5,4 +5,4 @@
 New errors are not allowed. Warnings are strongly discouraged.
 
   $ hg files "set:(**.py or **.txt) - tests/**" | sed 's|\\|/|g' |
-  >   xargs python contrib/check-config.py
+  >   python contrib/check-config.py