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diff --git a/sys/contrib/openzfs/tests/zfs-tests/tests/functional/nopwrite/nopwrite_negative.ksh b/sys/contrib/openzfs/tests/zfs-tests/tests/functional/nopwrite/nopwrite_negative.ksh
new file mode 100755
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+++ b/sys/contrib/openzfs/tests/zfs-tests/tests/functional/nopwrite/nopwrite_negative.ksh
@@ -0,0 +1,90 @@
+#!/bin/ksh
+
+#
+# This file and its contents are supplied under the terms of the
+# Common Development and Distribution License ("CDDL"), version 1.0.
+# You may only use this file in accordance with the terms of version
+# 1.0 of the CDDL.
+#
+# A full copy of the text of the CDDL should have accompanied this
+# source.  A copy of the CDDL is also available via the Internet at
+# http://www.illumos.org/license/CDDL.
+#
+
+#
+# Copyright (c) 2012, 2016 by Delphix. All rights reserved.
+#
+
+. $STF_SUITE/include/libtest.shlib
+. $STF_SUITE/tests/functional/nopwrite/nopwrite.shlib
+
+#
+# Description:
+# Verify that duplicate writes to a clone are accounted as new data if the
+# prerequisites for nopwrite are not met.
+#
+# Scenarios:
+# 1. The file in the origin ds is written without compression or sha256.
+# 2. The file in the origin ds is written before sha256 checksum is turned on.
+# 3. The clone does not have compression.
+# 4. The clone does not have the appropriate checksum.
+#
+
+verify_runnable "global"
+origin="$TESTPOOL/$TESTFS"
+log_onexit cleanup
+
+function cleanup
+{
+	datasetexists $origin && log_must zfs destroy -R $origin
+	log_must zfs create -o mountpoint=$TESTDIR $origin
+}
+
+log_assert "nopwrite isn't enabled without the prerequisites"
+
+# Data written into origin fs without compression or sha256
+dd if=/dev/urandom of=$TESTDIR/file bs=1024k count=$MEGS conv=notrunc \
+    >/dev/null 2>&1 || log_fail "dd of $TESTDIR/file failed."
+zfs snapshot $origin@a || log_fail "zfs snap failed"
+log_must zfs clone -o compress=on $origin@a $origin/clone
+log_must zfs set checksum=sha256 $origin/clone
+dd if=/$TESTDIR/file of=/$TESTDIR/clone/file bs=1024k count=$MEGS \
+    conv=notrunc >/dev/null 2>&1 || log_fail "dd failed."
+log_mustnot verify_nopwrite $origin $origin@a $origin/clone
+zfs destroy -R $origin@a || log_fail "zfs destroy failed"
+log_must rm -f $TESTDIR/file
+
+# Data written to origin fs before checksum enabled
+log_must zfs set compress=on $origin
+dd if=/dev/urandom of=$TESTDIR/file bs=1024k count=$MEGS conv=notrunc \
+    >/dev/null 2>&1 || log_fail "dd into $TESTDIR/file failed."
+log_must zfs set checksum=sha256 $origin
+zfs snapshot $origin@a || log_fail "zfs snap failed"
+log_must zfs clone $origin@a $origin/clone
+dd if=/$TESTDIR/file of=/$TESTDIR/clone/file bs=1024k count=$MEGS \
+    conv=notrunc >/dev/null 2>&1 || log_fail "dd failed."
+log_mustnot verify_nopwrite $origin $origin@a $origin/clone
+zfs destroy -R $origin@a || log_fail "zfs destroy failed"
+log_must rm -f $TESTDIR/file
+
+# Clone with compression=off
+dd if=/dev/urandom of=$TESTDIR/file bs=1024k count=$MEGS conv=notrunc \
+    >/dev/null 2>&1 || log_fail "dd into $TESTDIR/file failed."
+zfs snapshot $origin@a || log_fail "zfs snap failed"
+log_must zfs clone -o compress=off $origin@a $origin/clone
+dd if=/$TESTDIR/file of=/$TESTDIR/clone/file bs=1024k count=$MEGS \
+    conv=notrunc >/dev/null 2>&1 || log_fail "dd failed."
+log_mustnot verify_nopwrite $origin $origin@a $origin/clone
+zfs destroy -R $origin@a || log_fail "zfs destroy failed"
+log_must rm -f $TESTDIR/file
+
+# Clone with fletcher4, rather than sha256
+dd if=/dev/urandom of=$TESTDIR/file bs=1024k count=$MEGS conv=notrunc \
+    >/dev/null 2>&1 || log_fail "dd into $TESTDIR/file failed."
+zfs snapshot $origin@a || log_fail "zfs snap failed"
+log_must zfs clone -o checksum=fletcher4 $origin@a $origin/clone
+dd if=/$TESTDIR/file of=/$TESTDIR/clone/file bs=1024k count=$MEGS \
+    conv=notrunc >/dev/null 2>&1 || log_fail "dd failed."
+log_mustnot verify_nopwrite $origin $origin@a $origin/clone
+
+log_pass "nopwrite isn't enabled without the prerequisites"