--- a/pvl/hosts/host.py	Mon Mar 02 19:36:39 2015 +0200
+++ b/pvl/hosts/host.py	Mon Mar 02 19:43:38 2015 +0200
@@ -74,7 +74,7 @@
         Parse the dhcp boot=... option
 
         >>> print parse_dhcp_boot(None)
-        None
+        {}
         >>> print parse_dhcp_boot({'filename': '/foo'})
         {'filename': '/foo'}
         >>> print parse_dhcp_boot({'filename': '/foo', 'next-server': 'bar'})