diff --git a/unittests/test_authentication_plain.py b/unittests/test_authentication_plain.py
index 8548749a0d46d2fed7fc1cb147dffee079e7dbe7..10cbc418df8bd81c81568a4df0cf1e8a4ac498f8 100644
--- a/unittests/test_authentication_plain.py
+++ b/unittests/test_authentication_plain.py
@@ -34,8 +34,8 @@ from pytest import raises
 
 def test_subclass_configure():
     # TODO I do not see the meaning of this test.
-    #It only tests, that the call of the super version of configure sets the 
-    #password property. And that due to the subclassing no longer a password 
+    # It only tests, that the call of the super version of configure sets the
+    # password property. And that due to the subclassing no longer a password
     # argument can be provided.
     # Suggestion: Either remove this test or state in what context this test
     # is meanigful.