diff --git a/test/soa_test/yahoo.com.nx.json b/test/soa_test/yahoo.com.nx.json
new file mode 100644
index 0000000..250ca5f
--- /dev/null
+++ b/test/soa_test/yahoo.com.nx.json
@@ -0,0 +1,17 @@
+{ "header":
+  { "id":19900,"qr":1,"opcode":0,"aa":0,"tc":0,"rd":1,"ra":1,"res1":0,"res2":0,"res3":0,"rcode":3},
+  "qdcount":1,
+  "ancount":0,
+  "nscount":1,
+  "arcount":0,
+  "question":[
+    {"name":"snthaouesnthaouensth.yahoo.com","type":255,"typeName":"ANY","class":1,"className":"IN","byteLength":36,"labels":["snthaouesnthaouensth","yahoo","com"],"cpcount":0}
+  ],
+  "answer":[],
+  "authority":[
+    {"name":"yahoo.com","type":6,"typeName":"SOA","class":1,"className":"IN","byteLength":61,"labels":["yahoo","com"],"cpcount":1,"rdstart":60,"rdlength":49,"ttl":599,"name_server":"ns1.yahoo.com","email_addr":"hostmaster.yahoo-inc.com","sn":2017092539,"ref":3600,"ret":300,"ex":1814400,"nx":600}
+  ],
+  "edns_options":[],
+  "additional":[],
+  "byteLength":109
+}