diff --git a/core/src/apps/common/passphrase.py b/core/src/apps/common/passphrase.py
index 6a418d48f0..a3f7bf91d2 100644
--- a/core/src/apps/common/passphrase.py
+++ b/core/src/apps/common/passphrase.py
@@ -34,7 +34,9 @@ async def _request_from_user(ctx: wire.Context) -> str:
     else:
         passphrase = await _request_on_host(ctx)
     if len(passphrase.encode()) > _MAX_PASSPHRASE_LEN:
-        raise wire.DataError("Maximum passphrase length is %d bytes" % _MAX_PASSPHRASE_LEN)
+        raise wire.DataError(
+            "Maximum passphrase length is %d bytes" % _MAX_PASSPHRASE_LEN
+        )
 
     return passphrase