diff --git a/tests/default_drop.py b/tests/default_drop.py
index 574593f..975e056 100644
--- a/tests/default_drop.py
+++ b/tests/default_drop.py
@@ -23,21 +23,6 @@
         do_barrier(self.controller)
 
         for of_port in config["port_map"].keys():
-            pkt = simple_tcp_packet()
-            self.dataplane.send(of_port, str(pkt))
-            count = 0
-            while True:
-                (response, raw) = self.controller.poll(ofp.OFPT_PACKET_IN)
-                if not response:  # Timeout
-                    break
-                if dataplane.match_exp_pkt(pkt, response.data): # Got match
-                    break
-                if not config["relax"]:  # Only one attempt to match
-                    break
-                count += 1
-                if count > 10:   # Too many tries
-                    break
-
-            self.assertTrue(response is None, 
-                            'Packet in message received on port ' + 
-                            str(of_port))
+            pkt = str(simple_tcp_packet())
+            self.dataplane.send(of_port, pkt)
+            verify_no_packet_in(self, pkt, of_port)