style: some of the suggestions from flake8
diff --git a/test/test_rs485.py b/test/test_rs485.py
index 27c0740..1d7ed09 100644
--- a/test/test_rs485.py
+++ b/test/test_rs485.py
@@ -15,6 +15,7 @@
 # on which port should the tests be performed:
 PORT = 0
 
+
 class Test_RS485_settings(unittest.TestCase):
     """Test RS485 related functionality"""
 
@@ -53,7 +54,6 @@
         self.assertEqual(self.s.read(5), b'hello')
 
 
-
 if __name__ == '__main__':
     import sys
     sys.stdout.write(__doc__)