diff --git a/configs/coins/bitcoin_testnet.json b/configs/coins/bitcoin_testnet.json
index f892a6a1..5e72c74d 100644
--- a/configs/coins/bitcoin_testnet.json
+++ b/configs/coins/bitcoin_testnet.json
@@ -59,7 +59,10 @@
       "xpub_magic_segwit_p2sh": 71979618,
       "xpub_magic_segwit_native": 73342198,
       "slip44": 1,
-      "additional_params": {}
+      "additional_params": {
+        "alternativeEstimateFee": "whatthefee",
+        "alternativeEstimateFeeParams": "{\"url\": \"https://whatthefee.io/data.json\", \"periodSeconds\": 60}"
+      }
     }
   },
   "meta": {