diff --git a/nats/aio/client.py b/nats/aio/client.py
index 5701283b..dec8b10a 100644
--- a/nats/aio/client.py
+++ b/nats/aio/client.py
@@ -71,14 +71,14 @@
 
 class Subscription:
     def __init__(
-        self,
-        subject='',
-        queue='',
-        future=None,
-        max_msgs=0,
-        is_async=False,
-        cb=None,
-        coro=None
+            self,
+            subject='',
+            queue='',
+            future=None,
+            max_msgs=0,
+            is_async=False,
+            cb=None,
+            coro=None
     ):
         self.subject = subject
         self.queue = queue
@@ -119,6 +119,7 @@ class Srv:
     """
     Srv is a helper data structure to hold state of a server.
     """
+
     def __init__(self, uri):
         self.uri = uri
         self.reconnects = 0
@@ -228,38 +229,38 @@ def __init__(self):
         }
 
     async def connect(
-        self,
-        servers=["nats://127.0.0.1:4222"],
-        io_loop=None,
-        loop=None,
-        error_cb=None,
-        disconnected_cb=None,
-        closed_cb=None,
-        discovered_server_cb=None,
-        reconnected_cb=None,
-        name=None,
-        pedantic=False,
-        verbose=False,
-        allow_reconnect=True,
-        connect_timeout=DEFAULT_CONNECT_TIMEOUT,
-        reconnect_time_wait=DEFAULT_RECONNECT_TIME_WAIT,
-        max_reconnect_attempts=DEFAULT_MAX_RECONNECT_ATTEMPTS,
-        ping_interval=DEFAULT_PING_INTERVAL,
-        max_outstanding_pings=DEFAULT_MAX_OUTSTANDING_PINGS,
-        dont_randomize=False,
-        flusher_queue_size=DEFAULT_MAX_FLUSHER_QUEUE_SIZE,
-        pending_size=DEFAULT_PENDING_SIZE,
-        no_echo=False,
-        tls=None,
-        tls_hostname=None,
-        user=None,
-        password=None,
-        token=None,
-        drain_timeout=DEFAULT_DRAIN_TIMEOUT,
-        signature_cb=None,
-        user_jwt_cb=None,
-        user_credentials=None,
-        nkeys_seed=None,
+            self,
+            servers=["nats://127.0.0.1:4222"],
+            io_loop=None,
+            loop=None,
+            error_cb=None,
+            disconnected_cb=None,
+            closed_cb=None,
+            discovered_server_cb=None,
+            reconnected_cb=None,
+            name=None,
+            pedantic=False,
+            verbose=False,
+            allow_reconnect=True,
+            connect_timeout=DEFAULT_CONNECT_TIMEOUT,
+            reconnect_time_wait=DEFAULT_RECONNECT_TIME_WAIT,
+            max_reconnect_attempts=DEFAULT_MAX_RECONNECT_ATTEMPTS,
+            ping_interval=DEFAULT_PING_INTERVAL,
+            max_outstanding_pings=DEFAULT_MAX_OUTSTANDING_PINGS,
+            dont_randomize=False,
+            flusher_queue_size=DEFAULT_MAX_FLUSHER_QUEUE_SIZE,
+            pending_size=DEFAULT_PENDING_SIZE,
+            no_echo=False,
+            tls=None,
+            tls_hostname=None,
+            user=None,
+            password=None,
+            token=None,
+            drain_timeout=DEFAULT_DRAIN_TIMEOUT,
+            signature_cb=None,
+            user_jwt_cb=None,
+            user_credentials=None,
+            nkeys_seed=None,
     ):
         for cb in [error_cb, disconnected_cb, closed_cb, reconnected_cb,
                    discovered_server_cb]:
@@ -675,15 +676,15 @@ async def _publish(self, subject, reply, payload, payload_size):
             await self._flush_pending()
 
     async def subscribe(
-        self,
-        subject,
-        queue="",
-        cb=None,
-        future=None,
-        max_msgs=0,
-        is_async=False,
-        pending_msgs_limit=DEFAULT_SUB_PENDING_MSGS_LIMIT,
-        pending_bytes_limit=DEFAULT_SUB_PENDING_BYTES_LIMIT,
+            self,
+            subject,
+            queue="",
+            cb=None,
+            future=None,
+            max_msgs=0,
+            is_async=False,
+            pending_msgs_limit=DEFAULT_SUB_PENDING_MSGS_LIMIT,
+            pending_bytes_limit=DEFAULT_SUB_PENDING_BYTES_LIMIT,
     ):
         """
         Takes a subject string and optional queue string to send a SUB cmd,
@@ -851,7 +852,7 @@ async def _subscribe(self, sub, ssid):
         await self._flush_pending()
 
     async def request(
-        self, subject, payload, timeout=0.5, expected=1, cb=None
+            self, subject, payload, timeout=0.5, expected=1, cb=None
     ):
         """
         Implements the request/response pattern via pub/sub
diff --git a/nats/aio/nuid.py b/nats/aio/nuid.py
index 38125cf8..b6a9b421 100644
--- a/nats/aio/nuid.py
+++ b/nats/aio/nuid.py
@@ -31,6 +31,7 @@ class NUID:
     NUID is an implementation of the approach for fast generation of
     unique identifiers used for inboxes in NATS.
     """
+
     def __init__(self):
         self._srand = SystemRandom()
         self._prand = Random(self._srand.randint(0, MaxInt))
diff --git a/tests/utils.py b/tests/utils.py
index 020c2b43..3cf77b5b 100644
--- a/tests/utils.py
+++ b/tests/utils.py
@@ -17,18 +17,18 @@
 
 class Gnatsd:
     def __init__(
-        self,
-        port=4222,
-        user="",
-        password="",
-        token="",
-        timeout=0,
-        http_port=8222,
-        debug=False,
-        tls=False,
-        cluster_listen=None,
-        routes=[],
-        config_file=None,
+            self,
+            port=4222,
+            user="",
+            password="",
+            token="",
+            timeout=0,
+            http_port=8222,
+            debug=False,
+            tls=False,
+            cluster_listen=None,
+            routes=[],
+            config_file=None,
     ):
         self.port = port
         self.user = user