diff --git a/src/libsystemd-network/test-dhcp-server.c b/src/libsystemd-network/test-dhcp-server.c
index db2cf0c7d48..1a5cb7ec34b 100644
--- a/src/libsystemd-network/test-dhcp-server.c
+++ b/src/libsystemd-network/test-dhcp-server.c
@@ -493,7 +493,7 @@ TEST(dhcp_server_static_lease_special_addresses) {
         _cleanup_(sd_dhcp_server_unrefp) sd_dhcp_server *server = NULL;
         ASSERT_OK(sd_dhcp_server_new(&server, 4242));
         ASSERT_OK(sd_dhcp_server_configure_pool(server, &(struct in_addr) { htobe32(INADDR_LOOPBACK) },
-                                                8, 0, 0));
+                                                8, /* offset= */ 0, /* size= */ 0));
 
         sd_dhcp_client_id client_id_subnet = {
                 .size = 7,
diff --git a/src/libsystemd-network/test-dhcp6-client.c b/src/libsystemd-network/test-dhcp6-client.c
index dc613ad1ebd..ac9fc97c0de 100644
--- a/src/libsystemd-network/test-dhcp6-client.c
+++ b/src/libsystemd-network/test-dhcp6-client.c
@@ -411,7 +411,7 @@ TEST(lease_timezone) {
 
         /* "UTC" in the main test messages bypasses the tzfile check in
          * verify_timezone(); exercise the validation with invalid inputs. */
-        ASSERT_ERROR(dhcp6_lease_set_timezone(lease, (const uint8_t *) "", 0), EINVAL);
+        ASSERT_ERROR(dhcp6_lease_set_timezone(lease, (const uint8_t *) "", /* optlen= */ 0), EINVAL);
         ASSERT_ERROR(dhcp6_lease_set_timezone(lease, (const uint8_t *) "UTC\0", 4), EINVAL);
         ASSERT_ERROR(dhcp6_lease_set_timezone(lease, (const uint8_t *) "/etc/passwd", 11), EINVAL);
         ASSERT_ERROR(dhcp6_lease_set_timezone(lease, (const uint8_t *) "../passwd", 9), EINVAL);