diff --git a/tests/test_wallets.py b/tests/test_wallets.py
index a7d6aa1d..a95a5ef9 100644
--- a/tests/test_wallets.py
+++ b/tests/test_wallets.py
@@ -2388,7 +2388,8 @@ def test_wallet_anti_fee_sniping(self):
         w.utxo_add(w.get_key().address, 1234567, os.urandom(32).hex(), 1)
         t = w.send_to('tb1qrjtz22q59e76mhumy0p586cqukatw5vcd0xvvz', 123456)
         block_height = Service(network='testnet', cache_uri='').blockcount()
-        self.assertAlmostEqual(t.locktime, block_height+1, delta=50)
+        # FIXME: remove delta when testnet network is stable again
+        self.assertAlmostEqual(t.locktime, block_height+1, delta=500)
 
         w2 = wallet_create_or_open('antifeesnipingtestwallet2', network='testnet', anti_fee_sniping=True,
                                    db_uri=self.database_uri)