diff --git a/common/tools/coin_info.py b/common/tools/coin_info.py
index ddf20aed76..b87cb29193 100755
--- a/common/tools/coin_info.py
+++ b/common/tools/coin_info.py
@@ -187,12 +187,16 @@ def validate_btc(coin):
         if coin["bech32_prefix"] is None:
             errors.append("bech32_prefix must be defined for segwit-enabled coin")
         if coin["xpub_magic_segwit_p2sh"] is None:
-            errors.append("xpub_magic_segwit_p2sh must be defined for segwit-enabled coin")
+            errors.append(
+                "xpub_magic_segwit_p2sh must be defined for segwit-enabled coin"
+            )
     else:
         if coin["bech32_prefix"] is not None:
             errors.append("bech32_prefix must not be defined for segwit-disabled coin")
         if coin["xpub_magic_segwit_p2sh"] is not None:
-            errors.append("xpub_magic_segwit_p2sh must not be defined for segwit-disabled coin")
+            errors.append(
+                "xpub_magic_segwit_p2sh must not be defined for segwit-disabled coin"
+            )
 
     for bc in coin["bitcore"] + coin["blockbook"]:
         if not bc.startswith("https://"):