diff --git a/tests/service/mod.rs b/tests/service/mod.rs
index 800e325..0a7283d 100644
--- a/tests/service/mod.rs
+++ b/tests/service/mod.rs
@@ -177,11 +177,14 @@ impl Service {
             let socket_addr = SocketAddr::new(listen_ip.clone(), 53);
             listen_ips.push(socket_addr);
             let cidr = IpNetwork::from_str(&cidr.clone()).unwrap();
+            let cidr = IpNetwork::new(cidr.network(), cidr.prefix()).unwrap();
+
             if !ipmap.contains_key(&listen_ip) {
                 ipmap.insert(listen_ip, cidr.network());
             }
 
             if !authority_map.contains_key(&cidr) {
+                let cidr = IpNetwork::new(cidr.network(), cidr.prefix()).unwrap();
                 let ptr_authority = RecordAuthority::new(
                     cidr.to_ptr_soa_name().unwrap(),
                     cidr.to_ptr_soa_name().unwrap(),
@@ -195,6 +198,7 @@ impl Service {
         if let Some(v6assign) = tn.network.config.clone().unwrap().v6_assign_mode {
             if v6assign.rfc4193.unwrap_or(false) {
                 let cidr = tn.network.clone().rfc4193().unwrap();
+                let cidr = IpNetwork::new(cidr.network(), cidr.prefix()).unwrap();
                 if !authority_map.contains_key(&cidr) {
                     let ptr_authority = RecordAuthority::new(
                         cidr.to_ptr_soa_name().unwrap(),