diff --git a/tests/api/test_fiat_api.py b/tests/api/test_fiat_api.py
index b7a2a8d9b..ba3dadbe1 100644
--- a/tests/api/test_fiat_api.py
+++ b/tests/api/test_fiat_api.py
@@ -15,7 +15,9 @@ UNSET_SECRET = _UnsetSecret()
 
 class FakeStripeWallet:
     def __init__(self, secret: str | None | _UnsetSecret = UNSET_SECRET):
-        self._secret = "connection-token" if isinstance(secret, _UnsetSecret) else secret
+        self._secret = (
+            "connection-token" if isinstance(secret, _UnsetSecret) else secret
+        )
 
     async def create_terminal_connection_token(self) -> dict[str, str]:
         if self._secret is None: