diff --git a/bin/cryptobox-unittests.conf b/bin/cryptobox-unittests.conf
index 7b721ab..594268a 100644
--- a/bin/cryptobox-unittests.conf
+++ b/bin/cryptobox-unittests.conf
@@ -2,7 +2,7 @@
 
 # comma separated list of possible prefixes for accesible devices
 # beware: .e.g "/dev/hd" grants access to _all_ harddisks
-AllowedDevices = /dev/ubd
+AllowedDevices = /dev/ubdb
 
 # use separate config partition? (1=yes / 0=no)
 UseConfigPartition = 1