diff --git a/tests/sys/netinet/igmp.py b/tests/sys/netinet/igmp.py
--- a/tests/sys/netinet/igmp.py
+++ b/tests/sys/netinet/igmp.py
@@ -36,7 +36,6 @@
 curdir = os.path.dirname(os.path.realpath(__file__))
 netpfil_common = curdir + "/../netpfil/common"
 sys.path.append(netpfil_common)
-from sniffer import Sniffer
 
 sc = None
 sp = None
@@ -87,6 +86,7 @@
         if1 = self.vnet.iface_alias_map["if1"]
 
         # Start a background sniff
+        from sniffer import Sniffer
         expected_pkt = { "type": "join", "group": "230.0.0.1" }
         sniffer = Sniffer(expected_pkt, check_igmpv3, if1.name, timeout=10)