diff --git a/integration_tests/blockstack_integration_tests/scenarios/name_preorder_register_collisions.py b/integration_tests/blockstack_integration_tests/scenarios/name_preorder_register_collisions.py
index 03607c763..d1208f1b9 100644
--- a/integration_tests/blockstack_integration_tests/scenarios/name_preorder_register_collisions.py
+++ b/integration_tests/blockstack_integration_tests/scenarios/name_preorder_register_collisions.py
@@ -27,6 +27,7 @@ import json
 import shutil
 import tempfile
 import os
+import sys
 
 wallets = [
     testlib.Wallet( "5JesPiN68qt44Hc2nT8qmyZ1JDwHebfoh9KQ52Lazb1m1LaKNj9", 100000000000 ),
@@ -178,6 +179,11 @@ def scenario( wallets, **kw ):
 
     testlib.next_block( **kw )
 
+    # warn the serialization checker that this changes behavior from 0.13
+    print "BLOCKSTACK_SERIALIZATION_CHANGE_BEHAVIOR"
+    sys.stdout.flush()
+    
+
 
 def check( state_engine ):