diff --git a/tools/testing/selftests/net/forwarding/lib.sh b/tools/testing/selftests/net/forwarding/lib.sh
index 89ba4cdd4392..7b18a53aa556 100644
--- a/tools/testing/selftests/net/forwarding/lib.sh
+++ b/tools/testing/selftests/net/forwarding/lib.sh
@@ -514,6 +514,29 @@ icmp6_capture_uninstall()
 	__icmp_capture_add_del del 100 v6 "$@"
 }
 
+__vlan_capture_add_del()
+{
+	local add_del=$1; shift
+	local pref=$1; shift
+	local dev=$1; shift
+	local filter=$1; shift
+
+	tc filter $add_del dev "$dev" ingress \
+	   proto 802.1q pref $pref \
+	   flower $filter \
+	   action pass
+}
+
+vlan_capture_install()
+{
+	__vlan_capture_add_del add 100 "$@"
+}
+
+vlan_capture_uninstall()
+{
+	__vlan_capture_add_del del 100 "$@"
+}
+
 matchall_sink_create()
 {
 	local dev=$1; shift
diff --git a/tools/testing/selftests/net/forwarding/mirror_vlan.sh b/tools/testing/selftests/net/forwarding/mirror_vlan.sh
index 1e10520dccf4..758b6d027971 100755
--- a/tools/testing/selftests/net/forwarding/mirror_vlan.sh
+++ b/tools/testing/selftests/net/forwarding/mirror_vlan.sh
@@ -76,29 +76,6 @@ test_vlan()
 	test_vlan_dir egress 0 8
 }
 
-vlan_capture_add_del()
-{
-	local add_del=$1; shift
-	local pref=$1; shift
-	local dev=$1; shift
-	local filter=$1; shift
-
-	tc filter $add_del dev "$dev" ingress \
-	   proto 802.1q pref $pref \
-	   flower $filter \
-	   action pass
-}
-
-vlan_capture_install()
-{
-	vlan_capture_add_del add 100 "$@"
-}
-
-vlan_capture_uninstall()
-{
-	vlan_capture_add_del del 100 "$@"
-}
-
 do_test_span_vlan_dir_ips()
 {
 	local expect=$1; shift