diff --git a/olt.py b/olt.py
index a8e26c4..4f78f2a 100644
--- a/olt.py
+++ b/olt.py
@@ -14,7 +14,8 @@
 
 from oftest.testutils import *
 
-from IGMP import IGMPv3
+from IGMP import IGMPv3, IGMPv3gr, IGMP_TYPE_V3_MEMBERSHIP_REPORT, IGMP_V3_GR_TYPE_INCLUDE
+
 
 # These parameters can be altered from the command line using the -t or --test-params= options.
 # Example: -t 'onu_port=129;olt_port=288;device_type=pmc'
@@ -171,9 +172,9 @@
         match.oxm_list.append(ofp.oxm.eth_type(0x800))
         match.oxm_list.append(ofp.oxm.ip_proto(2))
 
-        pkt = scapy.Ether(dst='01:00:5E:7F:FF:FF', src='00:00:00:00:00:01')/ \
-              scapy.IP(src='10.0.0.1', dst='10.0.0.2', ttl=60, tos=0, id=0, proto=2)
-
+        igmp = IGMPv3(type=IGMP_TYPE_V3_MEMBERSHIP_REPORT, max_resp_code=30, gaddr="224.0.0.1")
+        igmp.grps = [IGMPv3gr(rtype=IGMP_V3_GR_TYPE_INCLUDE, mcaddr="229.10.20.30")]
+        pkt = IGMPv3.fixup( scapy.Ether(src='00:00:00:00:be:ef') / scapy.IP() / igmp )
         pkt = pkt / ("0" * (100 - len(pkt)))
 
         testPacketIn(self, match, pkt)