diff --git a/test/functional/mempool_reorg.py b/test/functional/mempool_reorg.py
index 123f0b4c28b75..e1ea2b258328c 100755
--- a/test/functional/mempool_reorg.py
+++ b/test/functional/mempool_reorg.py
@@ -20,8 +20,6 @@ def set_test_params(self):
     def skip_test_if_missing_module(self):
         self.skip_if_no_wallet()
 
-    alert_filename = None  # Set by setup_network
-
     def run_test(self):
         # Start with a 200 block chain
         assert_equal(self.nodes[0].getblockcount(), 200)