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diff --git a/tests/zfs-tests/tests/functional/cli_root/zfs_set/canmount_003_pos.ksh b/tests/zfs-tests/tests/functional/cli_root/zfs_set/canmount_003_pos.ksh
new file mode 100755
index 000000000000..886b120f2fa4
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+++ b/tests/zfs-tests/tests/functional/cli_root/zfs_set/canmount_003_pos.ksh
@@ -0,0 +1,111 @@
+#!/bin/ksh -p
+#
+# CDDL HEADER START
+#
+# The contents of this file are subject to the terms of the
+# Common Development and Distribution License (the "License").
+# You may not use this file except in compliance with the License.
+#
+# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+# or http://www.opensolaris.org/os/licensing.
+# See the License for the specific language governing permissions
+# and limitations under the License.
+#
+# When distributing Covered Code, include this CDDL HEADER in each
+# file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+# If applicable, add the following below this CDDL HEADER, with the
+# fields enclosed by brackets "[]" replaced with your own identifying
+# information: Portions Copyright [yyyy] [name of copyright owner]
+#
+# CDDL HEADER END
+#
+
+#
+# Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
+# Use is subject to license terms.
+#
+
+#
+# Copyright (c) 2012 by Delphix. All rights reserved.
+#
+
+. $STF_SUITE/include/libtest.shlib
+. $STF_SUITE/tests/functional/cli_root/zfs_set/zfs_set_common.kshlib
+
+#
+# DESCRIPTION:
+# While canmount=noauto and  the dataset is mounted,
+# zfs must not attempt to unmount it.
+#
+# STRATEGY:
+# 1. Setup a pool and create fs, volume, snapshot clone within it.
+# 2. Set canmount=noauto for each dataset and check the return value
+#    and check if it still can not be unmounted when the dataset is mounted
+#
+
+verify_runnable "both"
+
+set -A dataset_pos "$TESTPOOL/$TESTFS" "$TESTPOOL/$TESTCLONE"
+
+function cleanup
+{
+	i=0
+	cd $pwd
+	while (( i < ${#dataset_pos[*]} )); do
+		ds=${dataset_pos[i]}
+		if datasetexists $ds; then
+			log_must $ZFS set mountpoint=${old_mnt[i]} $ds
+			log_must $ZFS set canmount=${old_canmount[i]} $ds
+		fi
+		(( i = i + 1 ))
+	done
+
+	ds=$TESTPOOL/$TESTCLONE
+	if datasetexists $ds; then
+		mntp=$(get_prop mountpoint $ds)
+		log_must $ZFS destroy $ds
+		if [[ -d $mntp ]]; then
+			log_must $RM -fr $mntp
+		fi
+	fi
+
+	if snapexists $TESTPOOL/$TESTFS@$TESTSNAP ; then
+		log_must $ZFS destroy -R $TESTPOOL/$TESTFS@$TESTSNAP
+	fi
+
+	$ZFS unmount -a > /dev/null 2>&1
+	log_must $ZFS mount -a
+}
+
+log_assert "While canmount=noauto and  the dataset is mounted,"\
+		" zfs must not attempt to unmount it"
+log_onexit cleanup
+
+set -A old_mnt
+set -A old_canmount
+typeset ds
+typeset pwd=$PWD
+
+log_must $ZFS snapshot $TESTPOOL/$TESTFS@$TESTSNAP
+log_must $ZFS clone $TESTPOOL/$TESTFS@$TESTSNAP $TESTPOOL/$TESTCLONE
+
+typeset -i i=0
+while (( i < ${#dataset_pos[*]} )); do
+	ds=${dataset_pos[i]}
+	old_mnt[i]=$(get_prop mountpoint $ds)
+	old_canmount[i]=$(get_prop canmount $ds)
+	(( i = i + 1 ))
+done
+
+i=0
+while (( i < ${#dataset_pos[*]} )) ; do
+	dataset=${dataset_pos[i]}
+	if  ismounted $dataset; then
+		log_must cd ${old_mnt[i]}
+		set_n_check_prop "noauto" "canmount" "$dataset"
+		log_must mounted $dataset
+	fi
+	(( i = i + 1 ))
+done
+
+log_pass "Setting canmount=noauto to filesystem while dataset busy pass."