diff --git a/kiwi_lint/docstring.py b/kiwi_lint/docstring.py
index 1f0738b390..3ed502a731 100644
--- a/kiwi_lint/docstring.py
+++ b/kiwi_lint/docstring.py
@@ -58,7 +58,7 @@ def visit_functiondef(self, node):
 
     @utils.only_required_for_messages("use-triple-double-quotes")
     def _check_docstring(self, node):
-        if node.doc in self._string_tokens:
-            token = self._string_tokens[node.doc]
+        if node.doc_node and node.doc_node.value in self._string_tokens:
+            token = self._string_tokens[node.doc_node.value]
             if not token.startswith('"""'):
                 self.add_message("use-triple-double-quotes", node=node)
diff --git a/kiwi_lint/similar_string.py b/kiwi_lint/similar_string.py
index b0518b654a..ac37b0ee48 100644
--- a/kiwi_lint/similar_string.py
+++ b/kiwi_lint/similar_string.py
@@ -87,7 +87,7 @@ def check_similar_and_add_error_message(
 
         if similar_string:
             if isinstance(node, str):
-                error_message["node"] = astroid.Module(node, file=node, doc=None)
+                error_message["node"] = astroid.Module(node, file=node)
             else:
                 error_message["node"] = node
             error_message["args"] = (