Fix error with not qualified command

On Debian 6 i have an error:

Error: Failed to apply catalog: Parameter unless failed on Exec[ensure mountpoint 'dir' exists]: 'test -d dir' is not qualified and no path was specified. Please qualify the command or specify a path. at /etc/puppet/modules/lvm/manifests/logical_volume.pp:47
Wrapped exception:
'test -d dir' is not qualified and no path was specified. Please qualify the command or specify a path.

because 'test' in debian located in /usr/bin/ directory