diff --git a/tests/ts/mount/fstab-btrfs b/tests/ts/mount/fstab-btrfs
index 090f52304..54c6bb8ba 100755
--- a/tests/ts/mount/fstab-btrfs
+++ b/tests/ts/mount/fstab-btrfs
@@ -42,7 +42,7 @@ TS_MOUNTPOINT_SUBVOL="$TS_MOUNTPOINT-subvol"
 TS_MOUNTPOINT_SUBVOLID="$TS_MOUNTPOINT-subvolid"
 TS_MOUNTPOINT_BIND="$TS_MOUNTPOINT-bind"
 
-ts_device_init 42
+ts_device_init 50
 DEVICE=$TS_LODEV
 [ -d "$TS_MOUNTPOINT_CREATE" ] || mkdir -p "$TS_MOUNTPOINT_CREATE"
 [ -d "$TS_MOUNTPOINT_DEFAULT" ] || mkdir -p "$TS_MOUNTPOINT_DEFAULT"