diff --git a/180 b/180
index 88c8f54e..3ad7972d 100644
--- a/180
+++ b/180
@@ -38,7 +38,7 @@ _scratch_mkfs_xfs >/dev/null 2>&1
 _scratch_mount
 
 # Do we have enough space on disk?
-FREE_BLOCKS=`df -kl $SCRATCH_MNT | grep -v Filesystem | awk '{print $4}'`
+FREE_BLOCKS=`df -klP $SCRATCH_MNT | grep -v Filesystem | awk '{print $4}'`
 [ $FREE_BLOCKS -lt 10485760 ] && _notrun "This test requires at least 10GB of \
                                           $SCRATCH_DEV to run"