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diff --git a/test/shell/duplicate-pvs-md0.sh b/test/shell/duplicate-pvs-md0.sh
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+++ b/test/shell/duplicate-pvs-md0.sh
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+#!/usr/bin/env bash
+
+# Copyright (C) 2012-2021 Red Hat, Inc. All rights reserved.
+#
+# This copyrighted material is made available to anyone wishing to use,
+# modify, copy, or redistribute it subject to the terms and conditions
+# of the GNU General Public License v.2.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation,
+# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+
+SKIP_WITH_LVMPOLLD=1
+SKIP_WITH_LVMLOCKD=1
+
+RUNDIR="/run"
+test -d "$RUNDIR" || RUNDIR="/var/run"
+PVS_ONLINE_DIR="$RUNDIR/lvm/pvs_online"
+VGS_ONLINE_DIR="$RUNDIR/lvm/vgs_online"
+HINTS="$RUNDIR/lvm/hints"
+
+_clear_online_files() {
+        # wait till udev is finished
+        aux udev_wait
+        rm -f "$PVS_ONLINE_DIR"/* "$VGS_ONLINE_DIR"/*
+}
+
+. lib/inittest
+
+MD_LEVEL=${MD_LEVEL-0}
+
+aux prepare_devs 4 10
+
+# Create an unused PV so that there is at least one PV in the hints
+# when the MD dev is stopped.  If there are no PVs, the hints are
+# empty, and the code falls back to scanning all, and we do not end
+# up testing the code with hints actively used.
+pvcreate "$dev3"
+
+## Test variations:
+# PV on md raid1|raid0, md_component_checks auto|start, mddev start|stopped,
+# one raid dev disabled when mddev is stopped.
+
+# LVM will ask udev if a dev is an md component, but we don't
+# want to rely on that ability in this test so stops lvm from
+# asking udev if a dev is an md component.
+aux lvmconf "devices/obtain_device_list_from_udev = 0" \
+	    "devices/md_component_detection = 1" \
+	    "devices/md_component_checks = \"auto\""
+
+aux extend_filter_md "a|/dev/md|"
+
+# Run in 2 passes  - 1st. with "auto"    2nd. with "start" component checks
+for pass in "auto" "start" ; do
+
+##########################################
+# PV on an md raidX device
+# md_component_checks: auto|start  (not start)
+# mddev: started                   (not stopped)
+#
+aux mdadm_create --metadata=1.0 --level="$MD_LEVEL" --chunk=64 --raid-devices=2 "$dev1" "$dev2"
+mddev=$(< MD_DEV)
+lvmdevices --adddev $mddev || true
+
+pvcreate "$mddev"
+PVIDMD=$(get pv_field "$mddev" uuid | tr -d - )
+vgcreate $vg "$mddev"
+lvcreate -n $lv1 -l 2 -an $vg
+
+# pvs shows only the md dev as PV
+pvs "$mddev"
+not pvs "$dev1"
+not pvs "$dev2"
+pvs | tee out
+grep "$mddev" out
+not grep "$dev1" out
+not grep "$dev2" out
+# N.B. in this case hints are disabled for duplicate pvs seen by scan
+# it would be preferrable if this didn't happen as in auto mode, but it's ok.
+test "$pass" = "auto" && grep "$mddev" "$HINTS"
+not grep "$dev1" "$HINTS"
+not grep "$dev2" "$HINTS"
+
+# normal activation works
+lvchange -ay $vg/$lv1
+check active $vg $lv1
+vgchange -an $vg
+
+# pvscan activation all works
+_clear_online_files
+pvscan --cache -aay
+test -e "$RUNDIR/lvm/pvs_online/$PVIDMD"
+test -e "$RUNDIR/lvm/vgs_online/$vg"
+check active $vg $lv1
+vgchange -an $vg
+
+# pvscan activation from mddev works
+_clear_online_files
+pvscan --cache -aay "$mddev"
+test -f "$RUNDIR/lvm/pvs_online/$PVIDMD"
+test -f "$RUNDIR/lvm/vgs_online/$vg"
+check active $vg $lv1
+vgchange -an $vg
+
+# pvscan activation from md components does nothing
+_clear_online_files
+pvscan --cache -aay "$dev1"
+test ! -f "$RUNDIR/lvm/pvs_online/$PVIDMD"
+test ! -f "$RUNDIR/lvm/vgs_online/$vg"
+
+if [ "$pass" = "auto" ] ; then
+	pvscan --cache -aay "$dev2"
+	test ! -f "$RUNDIR/lvm/pvs_online/$PVIDMD"
+	test ! -f "$RUNDIR/lvm/vgs_online/$vg"
+fi
+# N.B. with raid0 the component because the PV/size difference
+# triggers and md component check, whereas with raid1 it doesn't.
+check inactive $vg $lv1
+
+vgchange -an $vg
+vgremove -f $vg
+lvmdevices --deldev $mddev || true
+aux cleanup_md_dev
+
+
+##########################################
+# PV on an md raidX device
+# md_component_checks: auto|start
+# mddev: stopped       (not started)
+#
+
+aux mdadm_create --metadata=1.0 --level="$MD_LEVEL" --chunk=64 --raid-devices=2 "$dev1" "$dev2"
+mddev=$(< MD_DEV)
+lvmdevices --adddev $mddev || true
+
+pvcreate "$mddev"
+PVIDMD=$(get pv_field "$mddev" uuid | tr -d - )
+vgcreate $vg "$mddev"
+lvcreate -n $lv1 -l 2 -an $vg
+
+mdadm --stop "$mddev"
+cat /proc/mdstat
+
+# pvs does not show the PV
+not pvs "$mddev"
+not pvs "$dev1"
+not pvs "$dev2"
+pvs | tee out
+not grep "$mddev" out
+# N.B. it would be preferrable if dev1 did not appear in hints but it's ok
+# not grep "$dev1" $HINTS
+not grep "$dev1" out
+not grep "$dev2" out
+pvscan --cache
+not grep "$mddev" "$HINTS"
+not grep "$dev1" "$HINTS"
+not grep "$dev2" "$HINTS"
+
+# the vg is not seen, normal activation does nothing
+not lvchange -ay $vg/$lv1
+not lvs $vg
+
+# pvscan activation all does nothing
+_clear_online_files
+pvscan --cache -aay
+test ! -f "$RUNDIR/lvm/pvs_online/$PVIDMD"
+test ! -f "$RUNDIR/lvm/vgs_online/$vg"
+
+# pvscan activation from md components does nothing
+_clear_online_files
+pvscan --cache -aay "$dev1"
+test ! -f "$RUNDIR/lvm/pvs_online/$PVIDMD"
+test ! -f "$RUNDIR/lvm/vgs_online/$vg"
+pvscan --cache -aay "$dev2"
+test ! -f "$RUNDIR/lvm/pvs_online/$PVIDMD"
+test ! -f "$RUNDIR/lvm/vgs_online/$vg"
+
+#lvs -o active $vg |tee out || true
+#not grep "active" out
+
+aux wipefs_a "$dev1" "$dev2"
+
+##########################################
+# PV on an md raidX device
+# md_component_checks: auto|start
+# mddev: stopped       (not started)
+# only one raid dev online
+#
+
+aux mdadm_create --metadata=1.0 --level="$MD_LEVEL" --chunk=64 --raid-devices=2 "$dev1" "$dev2"
+mddev=$(< MD_DEV)
+lvmdevices --adddev $mddev || true
+
+pvcreate "$mddev"
+PVIDMD=$(get pv_field "$mddev" uuid | tr -d - )
+vgcreate $vg "$mddev"
+lvcreate -n $lv1 -l 2 -an $vg
+
+mdadm --stop "$mddev"
+cat /proc/mdstat
+
+# disable one leg
+aux disable_dev "$dev2"
+
+# pvs does not show the PV
+not pvs "$mddev"
+not pvs "$dev1"
+not pvs "$dev2"
+pvs | tee out
+not grep "$mddev" out
+not grep "$dev1" out
+not grep "$dev2" out
+pvscan --cache
+not grep "$mddev" "$HINTS"
+# N.B. would be preferrable for this md component to not be in hints
+# grep "$dev1" $HINTS
+not grep "$dev1" "$HINTS"
+not grep "$dev2" "$HINTS"
+
+# the vg is not seen, normal activation does nothing
+not lvchange -ay $vg/$lv1
+not lvs $vg
+
+# pvscan activation all does nothing
+_clear_online_files
+pvscan --cache -aay
+test ! -f "$RUNDIR/lvm/pvs_online/$PVIDMD"
+test ! -f "$RUNDIR/lvm/vgs_online/$vg"
+
+# pvscan activation from md components does nothing
+_clear_online_files
+pvscan --cache -aay "$dev1"
+test ! -f "$RUNDIR/lvm/pvs_online/$PVIDMD"
+test ! -f "$RUNDIR/lvm/vgs_online/$vg"
+pvscan --cache -aay "$dev2"
+test ! -f "$RUNDIR/lvm/pvs_online/$PVIDMD"
+test ! -f "$RUNDIR/lvm/vgs_online/$vg"
+
+aux enable_dev "$dev2"
+lvmdevices --deldev $mddev || true
+aux cleanup_md_dev
+
+aux wipefs_a "$dev1" "$dev2"
+
+if [ "$MD_LEVEL" = "1" ] ; then
+##########################################
+# PV on an md raid1 device, auto+stopped
+# md_component_checks: auto|start
+# mddev: stopped       (not started)
+# three raid images
+#
+aux mdadm_create --metadata=1.0 --level="$MD_LEVEL" --chunk=64 --raid-devices=3 "$dev1" "$dev2" "$dev4"
+mddev=$(< MD_DEV)
+lvmdevices --adddev $mddev || true
+
+pvcreate "$mddev"
+PVIDMD=$(get pv_field "$mddev" uuid | tr -d - )
+vgcreate $vg "$mddev"
+lvcreate -n $lv1 -l 2 -an $vg
+
+mdadm --stop "$mddev"
+cat /proc/mdstat
+
+# pvs does not show the PV
+not pvs "$mddev"
+not pvs "$dev1"
+not pvs "$dev2"
+not pvs "$dev4"
+pvs | tee out
+not grep "$mddev" out
+not grep "$dev1" out
+not grep "$dev2" out
+not grep "$dev4" out
+pvscan --cache
+not grep "$mddev" "$HINTS"
+not grep "$dev1" "$HINTS"
+not grep "$dev2" "$HINTS"
+not grep "$dev4" "$HINTS"
+
+# the vg is not seen, normal activation does nothing
+not lvchange -ay $vg/$lv1
+not lvs $vg
+
+# pvscan activation all does nothing
+_clear_online_files
+pvscan --cache -aay
+test ! -f "$RUNDIR/lvm/pvs_online/$PVIDMD"
+test ! -f "$RUNDIR/lvm/vgs_online/$vg"
+
+# pvscan activation from md components does nothing
+_clear_online_files
+pvscan --cache -aay "$dev1"
+test ! -f "$RUNDIR/lvm/pvs_online/$PVIDMD"
+test ! -f "$RUNDIR/lvm/vgs_online/$vg"
+pvscan --cache -aay "$dev2"
+test ! -f "$RUNDIR/lvm/pvs_online/$PVIDMD"
+test ! -f "$RUNDIR/lvm/vgs_online/$vg"
+pvscan --cache -aay "$dev4"
+test ! -f "$RUNDIR/lvm/pvs_online/$PVIDMD"
+test ! -f "$RUNDIR/lvm/vgs_online/$vg"
+
+aux wipefs_a "$dev1" "$dev2" "$dev4"
+fi   # MD_LEVEL == 1
+
+# next loop with 'start'
+test "$pass" != "auto" || aux lvmconf "devices/md_component_checks = \"start\""
+
+done