diff --git a/filter/test.conf b/filter/test.conf
index dedad1d8..1858c0ee 100644
--- a/filter/test.conf
+++ b/filter/test.conf
@@ -1281,7 +1281,7 @@ prefix set pxt;
 
 	bt_assert(format(NET_IP4) = "(enum 36)1"); ## if (net.type = NET_IP4) ...
 	bt_assert(format(NET_VPN6) = "(enum 36)4");
-	bt_assert(format(0:1:2) = "0:1:2");
+	bt_assert(format(0:1:2) = "1:2");
 }
 
 bt_test_suite(t_mixed_prefix, "Testing mixed net types");