diff --git a/examples/test_client.py b/examples/test_client.py
index cc9b1ac..2fe04e7 100644
--- a/examples/test_client.py
+++ b/examples/test_client.py
@@ -95,6 +95,7 @@ async def test_client() -> None:
 
         if msg.type.name == "BUFFER":
             img_data += msg.data
+
         if msg.type.name == "JSON" and msg.data == b"true":
             assert (
                 base64.b64encode(hashlib.sha256(img_data).digest()) == b"kqZ52sDcJSHOx7m4Ww80kK1KIZ65gpGnqwZlfaIVWWM="
diff --git a/examples/test_server.py b/examples/test_server.py
index 7854f51..b7ed490 100644
--- a/examples/test_server.py
+++ b/examples/test_server.py
@@ -43,6 +43,7 @@ async def on_connect(conn: SHSDuplexStream) -> None:
     api.add_connection(packet_stream)
 
     print("connect", conn)
+
     async for msg in packet_stream:
         print(msg)
 
diff --git a/ssb/feed/models.py b/ssb/feed/models.py
index 5b9a9de..a7265ca 100644
--- a/ssb/feed/models.py
+++ b/ssb/feed/models.py
@@ -109,7 +109,6 @@ class Message:
     ):
         self.feed = feed
         self.content = content
-
         self.signature = signature
         self.previous = previous
         self.timestamp = get_millis_1970() if timestamp is None else timestamp
@@ -199,4 +198,5 @@ class LocalMessage(Message):
     def _sign(self) -> str:
         # ensure ordering of keys and indentation of 2 characters, like ssb-keys
         data = self.serialize(add_signature=False)
+
         return (b64encode(bytes(self.feed.sign(data))) + b".sig.ed25519").decode("ascii")
diff --git a/ssb/packet_stream.py b/ssb/packet_stream.py
index 7055ab0..75b3f72 100644
--- a/ssb/packet_stream.py
+++ b/ssb/packet_stream.py
@@ -134,6 +134,7 @@ class PSMessage:
 
         if self.type == PSMessageType.TEXT:
             assert isinstance(self.body, str)
+
             return self.body.encode("utf-8")
 
         if self.type == PSMessageType.JSON:
diff --git a/ssb/util.py b/ssb/util.py
index c0460f3..9e008a4 100644
--- a/ssb/util.py
+++ b/ssb/util.py
@@ -59,4 +59,5 @@ def load_ssb_secret(filename: Optional[str] = None) -> SSBSecret:
         raise ConfigException("Algorithm not known: " + config["curve"])
 
     server_prv_key = b64decode(config["private"][:-8])
+
     return {"keypair": SigningKey(server_prv_key[:32]), "id": config["id"]}
diff --git a/tests/test_packet_stream.py b/tests/test_packet_stream.py
index 9251321..b8a982b 100644
--- a/tests/test_packet_stream.py
+++ b/tests/test_packet_stream.py
@@ -303,6 +303,7 @@ async def test_message_stream(
     handler = list(ps._event_map.values())[1][1]  # pylint: disable=protected-access
 
     mock_process = mocker.patch.object(handler, "process", wraps=handler.process)
+
     ps_client.feed(
         [
             b"\n\x00\x00\x02\xc5\xff\xff\xff\xfe",
@@ -348,6 +349,7 @@ async def test_message_request(
     assert ps.register_handler.call_count == 1  # type: ignore[attr-defined]  # pylint: disable=no-member
     handler = list(ps._event_map.values())[0][1]  # pylint: disable=protected-access
     mock_process = mocker.patch.object(handler, "process")
+
     ps_server.feed(
         [
             b"\x02\x00\x00\x00>\xff\xff\xff\xff",