diff --git a/libs/community/langchain_community/memory/kg.py b/libs/community/langchain_community/memory/kg.py
index 97d6a02e84..09787d396c 100644
--- a/libs/community/langchain_community/memory/kg.py
+++ b/libs/community/langchain_community/memory/kg.py
@@ -136,5 +136,5 @@ try:
             self.kg.clear()
 except ImportError:
     # Placeholder object
-    class ConversationKGMemory:
+    class ConversationKGMemory:  # type: ignore[no-redef]
         pass
diff --git a/libs/community/langchain_community/memory/motorhead_memory.py b/libs/community/langchain_community/memory/motorhead_memory.py
index 50f122c56d..1dbc117cc0 100644
--- a/libs/community/langchain_community/memory/motorhead_memory.py
+++ b/libs/community/langchain_community/memory/motorhead_memory.py
@@ -96,5 +96,5 @@ try:
             requests.delete(f"{self.url}/sessions/{self.session_id}/memory")
 except ImportError:
     # Placeholder object
-    class MotorheadMemory:
+    class MotorheadMemory:  # type: ignore[no-redef]
         pass
diff --git a/libs/community/langchain_community/memory/zep_memory.py b/libs/community/langchain_community/memory/zep_memory.py
index 9743aa8240..80d7caad0c 100644
--- a/libs/community/langchain_community/memory/zep_memory.py
+++ b/libs/community/langchain_community/memory/zep_memory.py
@@ -125,5 +125,5 @@ try:
             self.chat_memory.add_ai_message(output_str, metadata=metadata)
 except ImportError:
     # Placeholder object
-    class ZepMemory:
+    class ZepMemory:  # type: ignore[no-redef]
         pass