diff --git a/src/yunohost/backup.py b/src/yunohost/backup.py
index 24313d416..a44819a33 100644
--- a/src/yunohost/backup.py
+++ b/src/yunohost/backup.py
@@ -2164,7 +2164,7 @@ def backup_list(with_info=False, human_readable=False):
         for a in result:
             try:
                 d[a] = backup_info(a, human_readable=human_readable)
-            except YunohostError, e:
+            except YunohostError as e:
                 logger.warning('%s: %s' % (a, e.strerror))
 
         result = d
diff --git a/src/yunohost/user.py b/src/yunohost/user.py
index 313835fe0..1cec8922d 100644
--- a/src/yunohost/user.py
+++ b/src/yunohost/user.py
@@ -144,8 +144,7 @@ def user_create(operation_logger, auth, username, firstname, lastname, mail, pas
 
     # Check that the mail domain exists
     if mail.split("@")[1] not in domain_list(auth)['domains']:
-        raise YunohostError(m18n.n('mail_domain_unknown',
-                                     domain=mail.split("@")[1]))
+        raise YunohostError('mail_domain_unknown', domain=mail.split("@")[1])
 
     operation_logger.start()
 
@@ -323,8 +322,7 @@ def user_update(operation_logger, auth, username, firstname=None, lastname=None,
         ]
         auth.validate_uniqueness({'mail': mail})
         if mail[mail.find('@') + 1:] not in domains:
-            raise YunohostError(m18n.n('mail_domain_unknown',
-                                         domain=mail[mail.find('@') + 1:]))
+            raise YunohostError('mail_domain_unknown', domain=mail[mail.find('@') + 1:])
         if mail in aliases:
             raise YunohostError('mail_unavailable')
 
diff --git a/src/yunohost/utils/password.py b/src/yunohost/utils/password.py
index b86fa23b1..ddc59cbe9 100644
--- a/src/yunohost/utils/password.py
+++ b/src/yunohost/utils/password.py
@@ -91,7 +91,7 @@ class PasswordValidator(object):
 
         status, msg = self.validation_summary(password)
         if status == "error":
-            raise YunohostError(1, m18n.n(msg))
+            raise YunohostError(msg)
 
     def validation_summary(self, password):
         """