If $TEST_DIR is a substring of $SCRATCH_MNT (like /mnt and /mnt2), this test always fail. Change to use _filter_testdir_and_scratch which will filter the longer string first if the other string is a substring of the longer one. Signed-off-by: Yongcheng Yang <yongcheng.yang@xxxxxxxxx> --- Previously it failed with 565.out.bad: ~~~ QA output created by 565 md5sums after xdev copy: 81615449a98aaaad8dc179b3bec87f38 TEST_DIR/test-565/file 81615449a98aaaad8dc179b3bec87f38 TEST_DIR2/copy ~~~ It can pass with this patch: ~~~ [09:18:16 root@ /var/lib/xfstests]# DIFF_LENGTH=-0 ./check -nfs generic/565 FSTYP -- nfs PLATFORM -- Linux/x86_64 kvm-guest 4.18.0-193.el8.x86_64 #1 SMP Fri Mar 27 14:35:58 UTC 2020 MKFS_OPTIONS -- test-machine.com:/export-xfstests/dir2 MOUNT_OPTIONS -- -overs=4 -o context=system_u:object_r:root_t:s0 test-machine.com:/export-xfstests/dir2 /mnt/nfsmp2 generic/565 10s Ran: generic/565 Passed all 1 tests ~~~ Thanks, Yongcheng tests/generic/565 | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tests/generic/565 b/tests/generic/565 index 39eb20c8..41d85b91 100755 --- a/tests/generic/565 +++ b/tests/generic/565 @@ -57,7 +57,7 @@ echo $testio | grep -q "cross-device" && \ echo -n $testio cmp $testdir/file $SCRATCH_MNT/copy echo "md5sums after xdev copy:" -md5sum $testdir/file $SCRATCH_MNT/copy | _filter_test_dir | _filter_scratch +md5sum $testdir/file $SCRATCH_MNT/copy | _filter_testdir_and_scratch # success, all done status=0 -- 2.20.1