diff --git a/tests/zfs-tests/tests/functional/slog/slog_006_pos.ksh b/tests/zfs-tests/tests/functional/slog/slog_006_pos.ksh
index 1d905c922e0f..5c312e82a09b 100755
--- a/tests/zfs-tests/tests/functional/slog/slog_006_pos.ksh
+++ b/tests/zfs-tests/tests/functional/slog/slog_006_pos.ksh
@@ -1,74 +1,73 @@
 #!/bin/ksh -p
 # SPDX-License-Identifier: CDDL-1.0
 #
 # 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 https://opensource.org/licenses/CDDL-1.0.
 # 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 2007 Sun Microsystems, Inc.  All rights reserved.
 # Use is subject to license terms.
 #
 
 #
 # Copyright (c) 2013, 2016 by Delphix. All rights reserved.
 #
 
 . $STF_SUITE/tests/functional/slog/slog.kshlib
 
 #
 # DESCRIPTION:
 #	Replacing a log device passes.
 #
 # STRATEGY:
 #	1. Create pool with log devices.
 #	2. Replacing one log device
 #	3. Display pool status
 #	4. Destroy and loop to create pool with different configuration.
 #
 
 verify_runnable "global"
 
 log_assert "Replacing a log device passes."
 log_onexit cleanup
 log_must setup
 
 for type in "" "mirror" "raidz" "raidz2"
 do
 	for spare in "" "spare"
 	do
 		for logtype in "" "mirror"
 		do
 			log_must zpool create $TESTPOOL $type $VDEV \
 				$spare $SDEV log $logtype $LDEV
 			sdev=$(random_get $LDEV)
 			tdev=$(random_get $LDEV2)
 			log_must zpool replace $TESTPOOL $sdev $tdev
 			log_must display_status $TESTPOOL
-			# sleep 15 to make sure replacement completely.
-			log_must sleep 15
+			log_must zpool wait $TESTPOOL
 			log_must verify_slog_device \
 				$TESTPOOL $tdev 'ONLINE' $logtype
 
 			log_must zpool destroy -f $TESTPOOL
 		done
 	done
 done
 
 log_pass "Replacing a log device passes."