diff --git a/electrum/tests/test_wallet_vertical.py b/electrum/tests/test_wallet_vertical.py
index 7d0cc8629..a21631a33 100644
--- a/electrum/tests/test_wallet_vertical.py
+++ b/electrum/tests/test_wallet_vertical.py
@@ -1413,7 +1413,7 @@ class TestWalletSending(TestCaseForTestnet):
         privkeys = ['93NQ7CFbwTPyKDJLXe97jczw33fiLijam2SCZL3Uinz1NSbHrTu', ]
         network = NetworkMock()
         dest_addr = 'tb1q3ws2p0qjk5vrravv065xqlnkckvzcpclk79eu2'
-        tx = sweep(privkeys, network=network, config=None, to_address=dest_addr, fee=5000, locktime=1325785, tx_version=1)
+        tx = sweep(privkeys, network=network, config=self.config, to_address=dest_addr, fee=5000, locktime=1325785, tx_version=1)
 
         tx_copy = tx_from_any(tx.serialize())
         self.assertEqual('010000000129349e5641d79915e9d0282fdbaee8c3df0b6731bab9d70bf626e8588bde24ac010000004847304402206bf0d0a93abae0d5873a62ebf277a5dd2f33837821e8b93e74d04e19d71b578002201a6d729bc159941ef5c4c9e5fe13ece9fc544351ba531b00f68ba549c8b38a9a01fdffffff01b82e0f00000000001600148ba0a0bc12b51831f58c7ea8607e76c5982c071fd93a1400',