diff --git a/letta/llm_api/anthropic.py b/letta/llm_api/anthropic.py
index 2d47a817..fd8d1195 100644
--- a/letta/llm_api/anthropic.py
+++ b/letta/llm_api/anthropic.py
@@ -743,6 +743,8 @@ def anthropic_chat_completions_request(
         anthropic_client = anthropic.Anthropic(api_key=anthropic_override_key)
     elif model_settings.anthropic_api_key:
         anthropic_client = anthropic.Anthropic()
+    else:
+        raise ValueError("No available Anthropic API key")
     data = _prepare_anthropic_request(
         data=data,
         inner_thoughts_xml_tag=inner_thoughts_xml_tag,
diff --git a/tests/test_agent_serialization.py b/tests/test_agent_serialization.py
index 6d8c25c9..14a4bb35 100644
--- a/tests/test_agent_serialization.py
+++ b/tests/test_agent_serialization.py
@@ -351,9 +351,9 @@ def test_append_copy_suffix_simple(local_client, server, serialize_test_agent, d
     """Test deserializing JSON into an Agent instance."""
     result = server.agent_manager.serialize(agent_id=serialize_test_agent.id, actor=default_user)
 
-    # write file 
+    # write file
     with open("test_agent_serialization.json", "w") as f:
-        # write json 
+        # write json
         f.write(json.dumps(result.model_dump(), indent=4))
 
     # Deserialize the agent