diff --git a/tests-1.3/flow_stats.py b/tests-1.3/flow_stats.py
index 2dc9a23..ef7b894 100644
--- a/tests-1.3/flow_stats.py
+++ b/tests-1.3/flow_stats.py
@@ -8,6 +8,7 @@
 """
 
 import logging
+import random
 
 from oftest import config
 import oftest.base_tests as base_tests
@@ -134,6 +135,9 @@
             0xFFFF000000000000,
         ]
 
+        for i in range(0, 10):
+            cookies.append(random.getrandbits(64))
+
         # Generate the matching cookies for each combination of cookie and mask
         matches = {}
         for cookie in cookies: