diff --git a/test/lib/02-unsubscribe-v5.py b/test/lib/02-unsubscribe-v5.py
index f649eaf5..6248d6e4 100755
--- a/test/lib/02-unsubscribe-v5.py
+++ b/test/lib/02-unsubscribe-v5.py
@@ -13,7 +13,8 @@ connack_packet = mosq_test.gen_connack(rc=0, proto_ver=5)
 disconnect_packet = mosq_test.gen_disconnect(proto_ver=5)
 
 mid = 1
-unsubscribe_packet = mosq_test.gen_unsubscribe(mid, "unsubscribe/test", proto_ver=5)
+props = mqtt5_props.gen_string_pair_prop(mqtt5_props.PROP_USER_PROPERTY, "key", "value")
+unsubscribe_packet = mosq_test.gen_unsubscribe(mid, "unsubscribe/test", proto_ver=5, properties=props)
 unsuback_packet = mosq_test.gen_unsuback(mid, proto_ver=5)
 
 sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
diff --git a/test/lib/c/02-unsubscribe-v5.c b/test/lib/c/02-unsubscribe-v5.c
index 1745a0f0..14f4e1ad 100644
--- a/test/lib/c/02-unsubscribe-v5.c
+++ b/test/lib/c/02-unsubscribe-v5.c
@@ -7,12 +7,18 @@ static int run = -1;
 
 static void on_connect(struct mosquitto *mosq, void *obj, int rc)
 {
+	int rc2;
+	mosquitto_property *proplist;
 	(void)obj;
 
 	if(rc){
 		exit(1);
 	}else{
-		mosquitto_unsubscribe(mosq, NULL, "unsubscribe/test");
+		rc2 = mosquitto_property_add_string_pair(&proplist, MQTT_PROP_USER_PROPERTY, "key", "value");
+		if(rc2 != MOSQ_ERR_SUCCESS){
+			abort();
+		}
+		mosquitto_unsubscribe_v5(mosq, NULL, "unsubscribe/test", proplist);
 	}
 }
 
diff --git a/test/mosq_test.py b/test/mosq_test.py
index 14ba87c9..4aeca8c7 100644
--- a/test/mosq_test.py
+++ b/test/mosq_test.py
@@ -737,10 +737,10 @@ def gen_unsubscribe(mid, topic, cmd=162, proto_ver=4, properties=b""):
         else:
             properties = mqtt5_props.prop_finalise(properties)
             packet = struct.pack("!B", cmd)
-            l = 2+2+len(topic)+1+len(properties)
+            l = 2+2+len(topic)+len(properties)
             packet += pack_remaining_length(l)
-            pack_format = "!HB"+str(len(properties))+"sH"+str(len(topic))+"s"
-            packet += struct.pack(pack_format, mid, len(properties), properties, len(topic), topic)
+            pack_format = "!H"+str(len(properties))+"sH"+str(len(topic))+"s"
+            packet += struct.pack(pack_format, mid, properties, len(topic), topic)
             return packet
     else:
         pack_format = "!BBHH"+str(len(topic))+"s"