diff --git a/extensions/cpsection/webaccount/web_service.py b/extensions/cpsection/webaccount/web_service.py
index 998acb120d..bbb88c80a1 100644
--- a/extensions/cpsection/webaccount/web_service.py
+++ b/extensions/cpsection/webaccount/web_service.py
@@ -16,7 +16,7 @@
 
 class WebService():
     def get_icon_name(self):
-        raise "Not implemented"
+        raise NotImplementedError
 
     def config_service_cb(self, widget, event, container):
-        raise "Not implemented"
+        raise NotImplementedError
diff --git a/tests/extensions/cpsection/webaccount/web_service.py b/tests/extensions/cpsection/webaccount/web_service.py
index 998acb120d..bbb88c80a1 100644
--- a/tests/extensions/cpsection/webaccount/web_service.py
+++ b/tests/extensions/cpsection/webaccount/web_service.py
@@ -16,7 +16,7 @@
 
 class WebService():
     def get_icon_name(self):
-        raise "Not implemented"
+        raise NotImplementedError
 
     def config_service_cb(self, widget, event, container):
-        raise "Not implemented"
+        raise NotImplementedError