diff --git a/serial/urlhandler/protocol_loop.py b/serial/urlhandler/protocol_loop.py
index 51217d5..ab6c0b0 100644
--- a/serial/urlhandler/protocol_loop.py
+++ b/serial/urlhandler/protocol_loop.py
@@ -29,11 +29,11 @@
 
 # map log level names to constants. used in from_url()
 LOGGER_LEVELS = {
-        'debug': logging.DEBUG,
-        'info': logging.INFO,
-        'warning': logging.WARNING,
-        'error': logging.ERROR,
-        }
+    'debug': logging.DEBUG,
+    'info': logging.INFO,
+    'warning': logging.WARNING,
+    'error': logging.ERROR,
+}
 
 
 class Serial(SerialBase):
@@ -169,7 +169,7 @@
             raise portNotOpenError
         data = to_bytes(data)
         # calculate aprox time that would be used to send the data
-        time_used_to_send = 10.0*len(data) / self._baudrate
+        time_used_to_send = 10.0 * len(data) / self._baudrate
         # when a write timeout is configured check if we would be successful
         # (not sending anything, not even the part that would have time)
         if self._write_timeout is not None and time_used_to_send > self._write_timeout:
diff --git a/serial/urlhandler/protocol_rfc2217.py b/serial/urlhandler/protocol_rfc2217.py
index c14c792..1898803 100644
--- a/serial/urlhandler/protocol_rfc2217.py
+++ b/serial/urlhandler/protocol_rfc2217.py
@@ -7,4 +7,4 @@
 #
 # SPDX-License-Identifier:    BSD-3-Clause
 
-from serial.rfc2217 import Serial # noqa
+from serial.rfc2217 import Serial  # noqa
diff --git a/serial/urlhandler/protocol_socket.py b/serial/urlhandler/protocol_socket.py
index 2f01a4a..a0ac59b 100644
--- a/serial/urlhandler/protocol_socket.py
+++ b/serial/urlhandler/protocol_socket.py
@@ -30,11 +30,11 @@
 
 # map log level names to constants. used in from_url()
 LOGGER_LEVELS = {
-        'debug': logging.DEBUG,
-        'info': logging.INFO,
-        'warning': logging.WARNING,
-        'error': logging.ERROR,
-        }
+    'debug': logging.DEBUG,
+    'info': logging.INFO,
+    'warning': logging.WARNING,
+    'error': logging.ERROR,
+}
 
 POLL_TIMEOUT = 2