diff --git a/ChangeLog b/ChangeLog
index 768e09bd6..e93749ed6 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -9,6 +9,9 @@
    - dtucker@cvs.openbsd.org 2004/06/13 13:51:02
      [Makefile test-exec.sh]
      Add scp regression test; with & ok markus@
+   - djm@cvs.openbsd.org 2004/06/13 15:04:08
+     [Makefile test-exec.sh]
+     regress test for client multiplexing; ok markus@
 
 20040615
  - (djm) OpenBSD CVS Sync
@@ -1234,4 +1237,4 @@
    - (djm) Trim deprecated options from INSTALL. Mention UsePAM
    - (djm) Fix quote handling in sftp; Patch from admorten AT umich.edu
 
-$Id: ChangeLog,v 1.3390 2004/06/16 10:15:59 dtucker Exp $
+$Id: ChangeLog,v 1.3391 2004/06/16 10:22:22 dtucker Exp $
diff --git a/regress/Makefile b/regress/Makefile
index 8f15f3b4d..64674521b 100644
--- a/regress/Makefile
+++ b/regress/Makefile
@@ -1,4 +1,4 @@
-#	$OpenBSD: Makefile,v 1.29 2004/06/13 13:51:02 dtucker Exp $
+#	$OpenBSD: Makefile,v 1.30 2004/06/13 15:04:08 djm Exp $
 
 REGRESS_TARGETS=	t1 t2 t3 t4 t5 t6 t7 t-exec
 tests:		$(REGRESS_TARGETS)
@@ -36,7 +36,8 @@ LTESTS= 	connect \
 		sftp-batch \
 		reconfigure \
 		dynamic-forward \
-		forwarding
+		forwarding \
+		multiplex
 
 USER!=		id -un
 CLEANFILES=	t2.out t6.out1 t6.out2 t7.out t7.out.pub copy.1 copy.2 \
diff --git a/regress/multiplex.sh b/regress/multiplex.sh
new file mode 100644
index 000000000..70a4e677f
--- /dev/null
+++ b/regress/multiplex.sh
@@ -0,0 +1,55 @@
+#	$OpenBSD: multiplex.sh,v 1.1 2004/06/13 15:04:08 djm Exp $
+#	Placed in the Public Domain.
+
+CTL=$OBJ/ctl-sock
+
+tid="connection multiplexing"
+
+start_sshd
+
+trace "start master, fork to background"
+${SSH} -2 -MS$CTL -F $OBJ/ssh_config -f somehost sleep 60
+
+trace "ssh transfer over multiplexed connection and check result"
+${SSH} -S$CTL otherhost cat /bin/ls > $OBJ/ls.copy
+test -f $OBJ/ls.copy			|| fail "failed copy /bin/ls"
+cmp /bin/ls $OBJ/ls.copy		|| fail "corrupted copy of /bin/ls"
+
+trace "ssh transfer over multiplexed connection and check result"
+${SSH} -S $CTL otherhost cat /bin/ls > $OBJ/ls.copy
+test -f $OBJ/ls.copy			|| fail "failed copy /bin/ls"
+cmp /bin/ls $OBJ/ls.copy		|| fail "corrupted copy of /bin/ls"
+
+rm -f $OBJ/ls.copy
+trace "sftp transfer over multiplexed connection and check result"
+echo "get /bin/ls $OBJ/ls.copy" | \
+	${SFTP} -oControlPath=$CTL otherhost
+test -f $OBJ/ls.copy			|| fail "failed copy /bin/ls"
+cmp /bin/ls $OBJ/ls.copy		|| fail "corrupted copy of /bin/ls"
+
+rm -f $OBJ/ls.copy
+trace "scp transfer over multiplexed connection and check result"
+${SCP} -oControlPath=$CTL otherhost:/bin/ls $OBJ/ls.copy
+test -f $OBJ/ls.copy			|| fail "failed copy /bin/ls"
+cmp /bin/ls $OBJ/ls.copy		|| fail "corrupted copy of /bin/ls"
+
+for s in 0 1 4 5 44; do
+	trace "exit status $s over multiplexed connection"
+	verbose "test $tid: status $s"
+	${SSH} -S $CTL otherhost exit $s
+	r=$?
+	if [ $r -ne $s ]; then
+		fail "exit code mismatch for protocol $p: $r != $s"
+	fi
+
+	# same with early close of stdout/err
+	trace "exit status $s with early close over multiplexed connection"
+	${SSH} -S $CTL -n otherhost \
+                exec sh -c \'"sleep 2; exec > /dev/null 2>&1; sleep 3; exit $s"\'
+	r=$?
+	if [ $r -ne $s ]; then
+		fail "exit code (with sleep) mismatch for protocol $p: $r != $s"
+	fi
+done
+
+sleep 30 # early close test sleeps 5 seconds per test
diff --git a/regress/test-exec.sh b/regress/test-exec.sh
index c8827b631..1f7e38d6a 100644
--- a/regress/test-exec.sh
+++ b/regress/test-exec.sh
@@ -1,4 +1,4 @@
-#	$OpenBSD: test-exec.sh,v 1.17 2004/06/13 13:51:02 dtucker Exp $
+#	$OpenBSD: test-exec.sh,v 1.18 2004/06/13 15:04:08 djm Exp $
 #	Placed in the Public Domain.
 
 PORT=4242
@@ -41,6 +41,7 @@ unset SSH_AUTH_SOCK
 # defaults
 SSH=ssh
 SSHD=sshd
+SCP=scp
 SSHAGENT=ssh-agent
 SSHADD=ssh-add
 SSHKEYGEN=ssh-keygen
@@ -55,6 +56,9 @@ fi
 if [ "x$TEST_SSH_SSHD" != "x" ]; then
 	SSHD="${TEST_SSH_SSHD}"
 fi
+if [ "x$TEST_SSH_SCP" != "x" ]; then
+	SCP="${TEST_SSH_SCP}"
+fi
 if [ "x$TEST_SSH_SSHAGENT" != "x" ]; then
 	SSHAGENT="${TEST_SSH_SSHAGENT}"
 fi
@@ -168,6 +172,7 @@ cat << EOF > $OBJ/sshd_config
 	LogLevel		QUIET
 	AcceptEnv		_XXX_TEST_*
 	AcceptEnv		_XXX_TEST
+	Subsystem	sftp	$SFTPSERVER
 	StrictModes		no
 EOF