diff --git a/tests-1.3/flow_stats.py b/tests-1.3/flow_stats.py
index b9fa8ad..4a82a89 100644
--- a/tests-1.3/flow_stats.py
+++ b/tests-1.3/flow_stats.py
@@ -140,8 +140,8 @@
 
         # Generate the matching cookies for each combination of cookie and mask
         matches = {}
-        for cookie in cookies:
-            for mask in cookies:
+        for mask in cookies:
+            for cookie in cookies:
                 matching = []
                 for cookie2 in cookies:
                     if cookie & mask == cookie2 & mask: