diff --git a/src/aiida/engine/processes/calcjobs/tasks.py b/src/aiida/engine/processes/calcjobs/tasks.py
index ca8dbf2d72..938054058b 100644
--- a/src/aiida/engine/processes/calcjobs/tasks.py
+++ b/src/aiida/engine/processes/calcjobs/tasks.py
@@ -54,6 +54,7 @@
 class PreSubmitException(Exception):  # noqa: N818
     """Raise in the `do_upload` coroutine when an exception is raised in `CalcJob.presubmit`."""
 
+
 async def get_transport(authinfo, transport_queue, cancellable):
     transport_requests = transport_queue._transport_requests
     last_transport_request = transport_requests.get(authinfo.pk, None)
@@ -72,6 +73,7 @@ async def get_transport(authinfo, transport_queue, cancellable):
         else:
             transport_queue._last_request_special = True
 
+
 async def task_upload_job(process: 'CalcJob', transport_queue: TransportQueue, cancellable: InterruptableFuture):
     """Transport task that will attempt to upload the files of a job calculation to the remote.
 
@@ -160,7 +162,6 @@ async def task_submit_job(node: CalcJobNode, transport_queue: TransportQueue, ca
     authinfo = node.get_authinfo()
 
     async def do_submit():
-
         transport = get_transport(authinfo=authinfo, transport_queue=transport_queue, cancellable=cancellable)
         print('a')
 
diff --git a/src/aiida/engine/transports.py b/src/aiida/engine/transports.py
index 24b3d97435..f9cb9f471f 100644
--- a/src/aiida/engine/transports.py
+++ b/src/aiida/engine/transports.py
@@ -13,7 +13,6 @@
 import contextvars
 import logging
 import traceback
-from datetime import datetime
 from typing import TYPE_CHECKING, Awaitable, Dict, Hashable, Iterator, Optional
 
 from aiida.common import timezone
@@ -32,6 +31,7 @@ def __init__(self):
         self.future: asyncio.Future = asyncio.Future()
         self.count = 0
 
+
 class TransportCloseRequest:
     """Information kept about close request for a transport object"""
 
@@ -39,6 +39,7 @@ def __init__(self):
         self.future: asyncio.Future = asyncio.Future()
         self.count = 0
 
+
 class TransportQueue:
     """A queue to get transport objects from authinfo.  This class allows clients
     to register their interest in a transport object which will be provided at
@@ -140,15 +141,17 @@ def do_open():
 
                 else:
                     # If the last one was a special request, wait the difference between safe_open_interval and lost
-                    open_callback_handle = self._loop.call_later(safe_open_interval-open_timedelta, do_open, context=contextvars.Context())
+                    open_callback_handle = self._loop.call_later(
+                        safe_open_interval - open_timedelta, do_open, context=contextvars.Context()
+                    )
 
             # open_callback_handle = self._loop.call_later(safe_open_interval, do_open, context=contextvars.Context())
 
-        # ? This logic is implemented in `tasks.py` instead. 
+        # ? This logic is implemented in `tasks.py` instead.
         # else:
         #     transport = authinfo.get_transport()
         #     return transport
-            # If transport_request is open already
+        # If transport_request is open already
         try:
             transport_request.count += 1
             yield transport_request.future
@@ -172,18 +175,19 @@ def do_close():
                         transport_request.future.result().close()
                         self._last_close_time = timezone.localtime(timezone.now())
 
-                    close_timedelta = (timezone.localtime(timezone.now()) - self._last_open_time).total_seconds() 
+                    close_timedelta = (timezone.localtime(timezone.now()) - self._last_open_time).total_seconds()
 
                     if close_timedelta > safe_open_interval:
-
                         # Also here logic when transport should be closed immediately, or when via call_later?
                         close_callback_handle = self._loop.call_soon(do_close, context=contextvars.Context())
                         self._last_close_time = timezone.localtime(timezone.now())
                         self._transport_requests.pop(authinfo.pk, None)
                     else:
-                        close_callback_handle = self._loop.call_later(safe_open_interval, do_close, context=contextvars.Context())
+                        close_callback_handle = self._loop.call_later(
+                            safe_open_interval, do_close, context=contextvars.Context()
+                        )
                         self._transport_requests.pop(authinfo.pk, None)
-                        
+
                         # transport_request.transport_closer = close_callback_handle
 
                     # This should be replaced with the call_later close_callback_handle invocation