diff --git a/chatmaild/src/chatmaild/doveauth.py b/chatmaild/src/chatmaild/doveauth.py
index c937cbeb..138497bc 100644
--- a/chatmaild/src/chatmaild/doveauth.py
+++ b/chatmaild/src/chatmaild/doveauth.py
@@ -46,7 +46,7 @@ def is_allowed_to_create(config: Config, user, cleartext_password) -> bool:
         len(localpart) > config.username_max_length
         or len(localpart) < config.username_min_length
     ):
-        if localpart != "echo" and localpart != "hello":
+        if localpart not in ("echo", "hello"): 
             logging.warning(
                 "localpart %s has to be between %s and %s chars long",
                 localpart,