diff --git a/src/DIRAC/Core/DISET/ThreadConfig.py b/src/DIRAC/Core/DISET/ThreadConfig.py
index a42dac9bf3e..8961b508518 100644
--- a/src/DIRAC/Core/DISET/ThreadConfig.py
+++ b/src/DIRAC/Core/DISET/ThreadConfig.py
@@ -131,7 +131,7 @@ def wrapper(*args, **kwargs):
 
         :return: wrapped method
         """
-        deco = tc.getDecorator()
+        deco = tc.getDecorator()  # pylint: disable=no-member
         if not deco:
             return method(*args, **kwargs)
         # Deco is a decorator sooo....
diff --git a/src/DIRAC/Core/DISET/private/BaseClient.py b/src/DIRAC/Core/DISET/private/BaseClient.py
index 2a4fc3aa956..41c965517b7 100755
--- a/src/DIRAC/Core/DISET/private/BaseClient.py
+++ b/src/DIRAC/Core/DISET/private/BaseClient.py
@@ -1,6 +1,7 @@
-""" This module exposes the BaseClient class,
-    which serves as base for InnerRPCClient and TransferClient.
+"""This module exposes the BaseClient class,
+which serves as base for InnerRPCClient and TransferClient.
 """
+
 import time
 
 import _thread
@@ -130,7 +131,7 @@ def __discoverSetup(self):
         if self.KW_SETUP in self.kwargs and self.kwargs[self.KW_SETUP]:
             self.setup = str(self.kwargs[self.KW_SETUP])
         else:
-            self.setup = self.__threadConfig.getSetup()
+            self.setup = self.__threadConfig.getSetup()  # pylint: disable=no-member
             if not self.setup:
                 self.setup = gConfig.getValue("/DIRAC/Setup", "Test")
         return S_OK()
@@ -258,8 +259,10 @@ def __discoverExtraCredentials(self):
             self.__extraCredentials = self.kwargs[self.KW_EXTRA_CREDENTIALS]
 
         # Are we delegating something?
-        delegatedDN = self.kwargs.get(self.KW_DELEGATED_DN) or self.__threadConfig.getDN()
-        delegatedGroup = self.kwargs.get(self.KW_DELEGATED_GROUP) or self.__threadConfig.getGroup()
+        delegatedDN = self.kwargs.get(self.KW_DELEGATED_DN) or self.__threadConfig.getDN()  # pylint: disable=no-member
+        delegatedGroup = (
+            self.kwargs.get(self.KW_DELEGATED_GROUP) or self.__threadConfig.getGroup()  # pylint: disable=no-member
+        )
         if delegatedDN:
             self.kwargs[self.KW_DELEGATED_DN] = delegatedDN
             if not delegatedGroup:
diff --git a/src/DIRAC/Core/Tornado/Client/private/TornadoBaseClient.py b/src/DIRAC/Core/Tornado/Client/private/TornadoBaseClient.py
index ef4ea30fb2f..5199509e717 100644
--- a/src/DIRAC/Core/Tornado/Client/private/TornadoBaseClient.py
+++ b/src/DIRAC/Core/Tornado/Client/private/TornadoBaseClient.py
@@ -142,7 +142,7 @@ def __discoverSetup(self):
         if self.KW_SETUP in self.kwargs and self.kwargs[self.KW_SETUP]:
             self.setup = str(self.kwargs[self.KW_SETUP])
         else:
-            self.setup = self.__threadConfig.getSetup()
+            self.setup = self.__threadConfig.getSetup()  # pylint: disable=no-member
             if not self.setup:
                 self.setup = gConfig.getValue("/DIRAC/Setup", "Test")
         return S_OK()
@@ -284,7 +284,7 @@ def __discoverExtraCredentials(self):
         if self.KW_EXTRA_CREDENTIALS in self.kwargs:
             self.__extraCredentials = self.kwargs[self.KW_EXTRA_CREDENTIALS]
         # Are we delegating something?
-        delegatedDN, delegatedGroup = self.__threadConfig.getID()
+        delegatedDN, delegatedGroup = self.__threadConfig.getID()  # pylint: disable=no-member
         if self.KW_DELEGATED_DN in self.kwargs and self.kwargs[self.KW_DELEGATED_DN]:
             delegatedDN = self.kwargs[self.KW_DELEGATED_DN]
         elif delegatedDN:
diff --git a/src/DIRAC/DataManagementSystem/Service/S3GatewayHandler.py b/src/DIRAC/DataManagementSystem/Service/S3GatewayHandler.py
index bfbf7e28a7a..fde22548d77 100644
--- a/src/DIRAC/DataManagementSystem/Service/S3GatewayHandler.py
+++ b/src/DIRAC/DataManagementSystem/Service/S3GatewayHandler.py
@@ -116,8 +116,8 @@ def export_createPresignedUrl(self, storageName, s3_method, urls, expiration):
             # If we can't obtain remote credentials, consider it permission denied
             return S_ERROR(errno.EACCES, "Could not obtain remote credentials")
 
-        self._tc.setDN(credDict["DN"])
-        self._tc.setGroup(credDict["group"])
+        self._tc.setDN(credDict["DN"])  # pylint: disable=no-member
+        self._tc.setGroup(credDict["group"])  # pylint: disable=no-member
 
         successful = {}
         failed = {}
diff --git a/src/DIRAC/FrameworkSystem/private/authorization/AuthServer.py b/src/DIRAC/FrameworkSystem/private/authorization/AuthServer.py
index 02824ca377d..33145d62c48 100644
--- a/src/DIRAC/FrameworkSystem/private/authorization/AuthServer.py
+++ b/src/DIRAC/FrameworkSystem/private/authorization/AuthServer.py
@@ -397,7 +397,7 @@ def create_authorization_response(self, response, username):
         """
         try:
             response = super().create_authorization_response(response, username)
-            response.clear_cookie("auth_session")
+            response.clear_cookie("auth_session")  # pylint: disable=no-member
             return response
         except Exception as e:
             sLog.exception(e)
diff --git a/src/DIRAC/Resources/Catalog/ConditionPlugins/ProxyPlugin.py b/src/DIRAC/Resources/Catalog/ConditionPlugins/ProxyPlugin.py
index c320f47855a..967de9b61ba 100644
--- a/src/DIRAC/Resources/Catalog/ConditionPlugins/ProxyPlugin.py
+++ b/src/DIRAC/Resources/Catalog/ConditionPlugins/ProxyPlugin.py
@@ -60,8 +60,8 @@ def __init__(self, conditions):
         # We may not have a proxy, check the thread local
         if not self.proxyInfo:
             tc = ThreadConfig()
-            userDN = tc.getDN()
-            userGroup = tc.getGroup()
+            userDN = tc.getDN()  # pylint: disable=no-member
+            userGroup = tc.getGroup()  # pylint: disable=no-member
             if userDN and userGroup:
                 userName = Registry.getUsernameForDN(userDN).get("Value")
                 if userName:
diff --git a/src/DIRAC/__init__.py b/src/DIRAC/__init__.py
index f4dbd83a241..da398d8c8da 100755
--- a/src/DIRAC/__init__.py
+++ b/src/DIRAC/__init__.py
@@ -60,7 +60,7 @@
 import sys
 import warnings
 from pkgutil import extend_path
-from typing import Any, Optional, Union
+from typing import Any, NoReturn, Optional, Union
 
 
 __path__ = extend_path(__path__, __name__)
@@ -298,7 +298,7 @@ def siteName():
 from DIRAC.Core.Utilities.Platform import getPlatformString, getPlatform, getPlatformTuple
 
 
-def exit(exitCode=0):
+def exit(exitCode=0) -> NoReturn:
     """
     Finish execution using callbacks
     """