--- a/tests/test-diffdir	Wed Mar 07 15:06:32 2007 +0100
+++ b/tests/test-diffdir	Fri Mar 09 18:09:02 2007 +0100
@@ -1,6 +1,7 @@
 #!/bin/sh
 
 hg init
+hg branch dummy # needed so -r "" doesn't point to the unnamed/default branch
 touch a
 hg add a
 hg ci -m "a" -d "1000000 0"