diff --git a/olt.py b/olt.py
index 5b1d0f5..26035c9 100644
--- a/olt.py
+++ b/olt.py
@@ -918,6 +918,7 @@
 
     def runTest(self):
         logging.info("Running cycling vlan test")
+        delete_all_flows(self.controller)
 
         self.vlan_pairs = []