diff --git a/tests/btrfs/012 b/tests/btrfs/012
index fd43da53..2d4cece5 100755
--- a/tests/btrfs/012
+++ b/tests/btrfs/012
@@ -42,6 +42,8 @@ _require_command "$BTRFS_CONVERT_PROG" btrfs-convert
 _require_command "$MKFS_EXT4_PROG" mkfs.ext4
 _require_command "$E2FSCK_PROG" e2fsck
 
+_require_fs_space $SCRATCH_MNT $(du -s /lib/modules/`uname -r` | ${AWK_PROG} '{print $1}')
+
 rm -f $seqres.full
 
 BLOCK_SIZE=`_get_block_size $TEST_DIR`