diff --git a/test/test-network/conf/dhcp-client-ipv4-only-ipv6-disabled.network b/test/test-network/conf/dhcp-client-ipv4-only-ipv6-disabled.network
index b0d0d8605e3..384678cc7e0 100644
--- a/test/test-network/conf/dhcp-client-ipv4-only-ipv6-disabled.network
+++ b/test/test-network/conf/dhcp-client-ipv4-only-ipv6-disabled.network
@@ -7,3 +7,4 @@ IPv6AcceptRA=false
 
 [DHCPv4]
 RoutesToDNS=yes
+SendOption=12:string:test