diff --git a/tests/base.py b/tests/base.py
index e2b0894..6f1de86 100644
--- a/tests/base.py
+++ b/tests/base.py
@@ -11,7 +11,7 @@ def preserve_refresh_token(existing_conns, payload):
     if not existing_conns:
         return payload
     conn_with_creds = connections.fetch_existing_connection_with_creds(existing_conns[0]['id'])
-    # payload['properties']['refresh_token'] = conn_with_creds['credentials']['refresh_token']
+    payload['properties']['refresh_token'] = conn_with_creds['credentials']['refresh_token']
     return payload
 
 class XeroScenarioBase(unittest.TestCase):