diff --git a/repeater/engine.py b/repeater/engine.py
index ecfcbd4..a909ac4 100644
--- a/repeater/engine.py
+++ b/repeater/engine.py
@@ -1141,9 +1141,7 @@ class RepeaterHandler(BaseHandler):
                             return False
 
                     try:
-                        sent = await self.dispatcher.send_packet(
-                            fwd_pkt, wait_for_ack=False
-                        )
+                        sent = await self.dispatcher.send_packet(fwd_pkt, wait_for_ack=False)
                         if not sent:
                             logger.warning(
                                 "Retransmit failed (attempt %d): dispatcher returned false",
diff --git a/repeater/packet_router.py b/repeater/packet_router.py
index 3f2e3e7..5d2a6da 100644
--- a/repeater/packet_router.py
+++ b/repeater/packet_router.py
@@ -172,9 +172,7 @@ class PacketRouter:
             # (avoids duty-cycle or dispatcher races where a later packet goes out first)
             async with self._inject_lock:
                 # Use local_transmission=True to bypass forwarding logic
-                sent = await self.daemon.repeater_handler(
-                    packet, metadata, local_transmission=True
-                )
+                sent = await self.daemon.repeater_handler(packet, metadata, local_transmission=True)
             if not sent:
                 logger.warning("Injected packet failed local transmission")
                 return False
@@ -194,9 +192,7 @@ class PacketRouter:
                     await push_rx(raw, 0, 0.0, exclude_hash=origin_hash)
                     servers = getattr(self.daemon, "companion_frame_servers", [])
                     pushed = sum(
-                        1
-                        for fs in servers
-                        if getattr(fs, "companion_hash", None) != origin_hash
+                        1 for fs in servers if getattr(fs, "companion_hash", None) != origin_hash
                     )
                     logger.debug(
                         "Echoed injected TX as raw RX (0x88) to %d companion client(s) "
@@ -221,9 +217,7 @@ class PacketRouter:
                     if dispatcher and hasattr(dispatcher, "wait_for_ack"):
                         try:
                             expected_crc = packet.get_crc()
-                            ack_ok = await dispatcher.wait_for_ack(
-                                expected_crc, timeout=5.0
-                            )
+                            ack_ok = await dispatcher.wait_for_ack(expected_crc, timeout=5.0)
                             if not ack_ok:
                                 logger.warning(
                                     "Injected packet ACK timeout (crc=%08X)", expected_crc
@@ -517,8 +511,7 @@ class PacketRouter:
             sent = await self.daemon.repeater_handler(packet, metadata)
             if sent is False:
                 logger.warning(
-                    "Inbound packet not transmitted by repeater handler "
-                    "(type=%s, header=0x%02x)",
+                    "Inbound packet not transmitted by repeater handler (type=%s, header=0x%02x)",
                     payload_type,
                     getattr(packet, "header", 0),
                 )
diff --git a/tests/test_engine.py b/tests/test_engine.py
index c6623fa..2560ef4 100644
--- a/tests/test_engine.py
+++ b/tests/test_engine.py
@@ -12,7 +12,6 @@ import time
 from unittest.mock import AsyncMock, MagicMock, patch
 
 import pytest
-
 from pymc_core.protocol import Packet, PacketBuilder
 from pymc_core.protocol.constants import (
     MAX_PATH_SIZE,
@@ -24,7 +23,6 @@ from pymc_core.protocol.constants import (
     ROUTE_TYPE_TRANSPORT_FLOOD,
 )
 
-
 # ---------------------------------------------------------------------------
 # Helpers — build minimal config / mocks needed by RepeaterHandler.__init__
 # ---------------------------------------------------------------------------
@@ -1083,7 +1081,9 @@ class TestTxMode:
 
         with patch("repeater.engine.asyncio.sleep", new_callable=AsyncMock):
             with patch.object(
-                handler, "schedule_retransmit", new=AsyncMock(return_value=asyncio.create_task(_boom()))
+                handler,
+                "schedule_retransmit",
+                new=AsyncMock(return_value=asyncio.create_task(_boom())),
             ):
                 with pytest.raises(RuntimeError, match="simulated tx failure"):
                     await handler(pkt, {"snr": 0.0, "rssi": -80}, local_transmission=True)
@@ -1102,7 +1102,9 @@ class TestTxMode:
             return False
 
         with patch.object(
-            handler, "schedule_retransmit", new=AsyncMock(return_value=asyncio.create_task(_tx_false()))
+            handler,
+            "schedule_retransmit",
+            new=AsyncMock(return_value=asyncio.create_task(_tx_false())),
         ):
             transmitted = await handler(pkt, {"snr": 0.0, "rssi": -80}, local_transmission=False)