diff --git a/test/nmap.uts b/test/nmap.uts
index 3c64e7416..2c3d508d2 100644
--- a/test/nmap.uts
+++ b/test/nmap.uts
@@ -9,6 +9,14 @@
 = Module loading
 load_module('nmap')
 
+= Test functions
+
+d = nmap_udppacket_sig(IP()/UDP(), IP(raw(IP()/ICMP(type=3, code=2)/IPerror()/UDPerror())))
+assert len(d) == 9
+
+d = nmap_tcppacket_sig(IP()/TCP())
+assert len(d) == 5
+
 = Fetch database
 from __future__ import print_function
 try: