From b3e5dd377e63309142573534f87a015785aa8723 Mon Sep 17 00:00:00 2001
From: BillionClaw <267901332+BillionClaw@users.noreply.github.com>
Date: Tue, 24 Mar 2026 07:38:24 +0800
Subject: [PATCH] test(anthropic): add regression test for tool_choice type
 'none'

---
 ...rimental_pass_through_adapters_transformation.py | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/tests/test_litellm/llms/anthropic/experimental_pass_through/adapters/test_anthropic_experimental_pass_through_adapters_transformation.py b/tests/test_litellm/llms/anthropic/experimental_pass_through/adapters/test_anthropic_experimental_pass_through_adapters_transformation.py
index ae970e1ff06..c14142fa6bd 100644
--- a/tests/test_litellm/llms/anthropic/experimental_pass_through/adapters/test_anthropic_experimental_pass_through_adapters_transformation.py
+++ b/tests/test_litellm/llms/anthropic/experimental_pass_through/adapters/test_anthropic_experimental_pass_through_adapters_transformation.py
@@ -2111,3 +2111,16 @@ class TestTranslateAnthropicOutputFormatToOpenAI:
         assert self.adapter.translate_anthropic_output_format_to_openai("invalid") is None
         assert self.adapter.translate_anthropic_output_format_to_openai({"type": "text"}) is None
         assert self.adapter.translate_anthropic_output_format_to_openai({"type": "json_schema"}) is None
+
+
+def test_translate_anthropic_tool_choice_none():
+    """
+    Regression test for issue #24443.
+
+    tool_choice={"type": "none"} should be translated to "none" for OpenAI format,
+    not raise a ValueError.
+    """
+    adapter = LiteLLMAnthropicMessagesAdapter()
+
+    result = adapter.translate_anthropic_tool_choice_to_openai({"type": "none"})
+    assert result == "none"