diff --git a/sbin/route/tests/basic.sh b/sbin/route/tests/basic.sh
index bb432daa0793..2e2ab9dba97f 100644
--- a/sbin/route/tests/basic.sh
+++ b/sbin/route/tests/basic.sh
@@ -1,124 +1,182 @@
 #-
 # SPDX-License-Identifier: BSD-2-Clause
 #
 # Copyright (c) 2020 Ahsan Barkati
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions
 # are met:
 # 1. Redistributions of source code must retain the above copyright
 #    notice, this list of conditions and the following disclaimer.
 # 2. Redistributions in binary form must reproduce the above copyright
 #    notice, this list of conditions and the following disclaimer in the
 #    documentation and/or other materials provided with the distribution.
 #
 # THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 # ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 # SUCH DAMAGE.
 #
 #
 
 . $(atf_get_srcdir)/utils.subr
 
 atf_test_case "basic_v4" "cleanup"
 basic_v4_head()
 {
 	atf_set descr 'add/change/delete route test for v4'
 	atf_set require.user root
 	atf_set require.progs jail jq
 }
 
 basic_v4_body()
 {
 	epair=$(vnet_mkepair)
 	ifconfig ${epair}a 192.0.2.2/24 up
 	vnet_mkjail alcatraz ${epair}b
 	jexec alcatraz ifconfig ${epair}b 192.0.2.1/24 up
 
 	# add a new route in the jail
 	jexec alcatraz route add 192.0.2.3 192.0.2.2
 	gateway=$(check_route "alcatraz" "192.0.2.3")
 
 	if [ "${gateway}" != "192.0.2.2" ]; then
 		atf_fail "Failed to add new route."
 	fi
 
 	# change the added route
 	jexec alcatraz route change 192.0.2.3 192.0.2.4
 	gateway=$(check_route "alcatraz" "192.0.2.3")
 
 	if [ "${gateway}" != "192.0.2.4" ]; then
 		atf_fail "Failed to change route."
 	fi
 
 	# delete the route
 	jexec alcatraz route delete 192.0.2.3
 	gateway=$(check_route "alcatraz" "192.0.2.3")
 
 	if [ "${gateway}" != "" ]; then
 		atf_fail "Failed to delete route."
 	fi
 }
 
 basic_v4_cleanup()
 {
 	vnet_cleanup
 }
 
 atf_test_case "basic_v6" "cleanup"
 basic_v6_head()
 {
 	atf_set descr 'add/change/delete route test for v6'
 	atf_set require.user root
 	atf_set require.progs jail jq
 }
 
 basic_v6_body()
 {
 	epair=$(vnet_mkepair)
 	ifconfig ${epair}a inet6 2001:db8:cc4b::1/64 up no_dad
 	vnet_mkjail alcatraz ${epair}b
 	jexec alcatraz ifconfig ${epair}b inet6 2001:db8:cc4b::2/64 up no_dad
 
 	# add a new route in the jail
 	jexec alcatraz route add -6 2001:db8:cc4b::3 2001:db8:cc4b::1
 	gateway=$(check_route "alcatraz" "2001:db8:cc4b::3")
 
 	if [ "${gateway}" != "2001:db8:cc4b::1" ]; then
 		atf_fail "Failed to add new route."
 	fi
 
 	# change the added route
 	jexec alcatraz route change -6 2001:db8:cc4b::3 2001:db8:cc4b::4
 	gateway=$(check_route "alcatraz" "2001:db8:cc4b::3")
 	if [ "${gateway}" != "2001:db8:cc4b::4" ]; then
 		atf_fail "Failed to change route."
 	fi
 
 	# delete the route
 	jexec alcatraz route -6 delete 2001:db8:cc4b::3
 	gateway=$(check_route "alcatraz" "2001:db8:cc4b::3")
 
 	if [ "${gateway}" != "" ]; then
 		atf_fail "Failed to delete route."
 	fi
 }
 
 basic_v6_cleanup()
 {
 	vnet_cleanup
 }
 
+atf_test_case "interface_route_v4" "cleanup"
+interface_route_v4_head()
+{
+	atf_set descr 'add interface route for v4'
+	atf_set require.user root
+	atf_set require.progs jail jq
+}
+
+interface_route_v4_body()
+{
+	epair=$(vnet_mkepair)
+	ifconfig ${epair}a up
+	vnet_mkjail alcatraz ${epair}b
+
+	# add interface route
+	jexec alcatraz route add "192.0.2.1" -iface ${epair}b
+	gateway=$(check_route "alcatraz" "192.0.2.1")
+
+	if [ -z "${gateway}" ]; then
+		atf_fail "Failed to add interface route."
+	fi
+}
+
+interface_route_v4_cleanup()
+{
+	vnet_cleanup
+}
+
+atf_test_case "interface_route_v6" "cleanup"
+interface_route_v6_head()
+{
+	atf_set descr 'add interface route for v6'
+	atf_set require.user root
+	atf_set require.progs jail jq
+}
+
+interface_route_v6_body()
+{
+	epair=$(vnet_mkepair)
+	ifconfig ${epair}a up
+	vnet_mkjail alcatraz ${epair}b
+
+	# add interface route
+	jexec alcatraz route add -6 "2001:db8:cc4b::1" -iface ${epair}b
+	gateway=$(check_route "alcatraz" "2001:db8:cc4b::1")
+
+	if [ -z "${gateway}" ]; then
+		atf_fail "Failed to add interface route."
+	fi
+}
+
+interface_route_v6_cleanup()
+{
+	vnet_cleanup
+}
+
 atf_init_test_cases()
 {
 	atf_add_test_case "basic_v4"
 	atf_add_test_case "basic_v6"
+	atf_add_test_case "interface_route_v4"
+	atf_add_test_case "interface_route_v6"
 }