Index: uspace/app/tester/vfs/vfs1.c
===================================================================
--- uspace/app/tester/vfs/vfs1.c	(revision cc1f8d49ea50ec53cdbef1c6e641762fee657fb0)
+++ uspace/app/tester/vfs/vfs1.c	(revision 1313ee92979dd133fd0dd0717213410aada3df10)
@@ -85,5 +85,5 @@
 		return "Unable to create null device";
 	
-	snprintf(null, MAX_DEVICE_NAME, "null%d", null_id);
+	snprintf(null, MAX_DEVICE_NAME, "null/%d", null_id);
 	int rc = mount(FS_TYPE, MOUNT_POINT, null, OPTIONS, FLAGS);
 	switch (rc) {