diff --git a/api/core/model_runtime/entities/message_entities.py b/api/core/model_runtime/entities/message_entities.py
index c307fc5515..0d104204bf 100644
--- a/api/core/model_runtime/entities/message_entities.py
+++ b/api/core/model_runtime/entities/message_entities.py
@@ -1,4 +1,3 @@
-from collections.abc import Sequence
 from enum import Enum, StrEnum
 from typing import Any, Annotated, Literal, Optional, Union, Union
 
diff --git a/api/tests/unit_tests/core/prompt/test_prompt_message.py b/api/tests/unit_tests/core/prompt/test_prompt_message.py
index 4e93ad7957..5de713b81a 100644
--- a/api/tests/unit_tests/core/prompt/test_prompt_message.py
+++ b/api/tests/unit_tests/core/prompt/test_prompt_message.py
@@ -1,4 +1,8 @@
-from core.model_runtime.entities.message_entities import ImagePromptMessageContent, TextPromptMessageContent, UserPromptMessage
+from core.model_runtime.entities.message_entities import (
+    ImagePromptMessageContent,
+    TextPromptMessageContent,
+    UserPromptMessage,
+)
 
 
 def test_build_prompt_message_with_prompt_message_contents():