diff --git a/proxy/routes/anthropic.py b/proxy/routes/anthropic.py
index d4a8c26..a5882b7 100644
--- a/proxy/routes/anthropic.py
+++ b/proxy/routes/anthropic.py
@@ -53,7 +53,6 @@ async def anthropic_proxy(
         k: v for k, v in request.headers.items() if k.lower() not in IGNORED_HEADERS
     }
     headers["accept-encoding"] = "identity"
-
     if request.headers.get(
         "invariant-authorization"
     ) is None and "|invariant-auth:" not in request.headers.get(HEADER_AUTHORIZATION):
diff --git a/tests/anthropic/test_anthropic_header_with_invariant_key.py b/tests/anthropic/test_anthropic_header_with_invariant_key.py
new file mode 100644
index 0000000..20040d8
--- /dev/null
+++ b/tests/anthropic/test_anthropic_header_with_invariant_key.py
@@ -0,0 +1,64 @@
+from unittest.mock import patch
+import os
+import anthropic
+from httpx import Client
+import datetime
+
+import pytest
+import sys
+sys.path.append(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+
+from util import *  # needed for pytest fixtures
+
+pytest_plugins = ("pytest_asyncio")
+@pytest.mark.skipif(not os.getenv("ANTHROPIC_API_KEY"), reason="No ANTHROPIC_API_KEY set")
+async def test_header(
+        context, proxy_url, explorer_api_url
+):
+    anthropic_api_key = os.getenv("ANTHROPIC_API_KEY")
+    dataset_name = "claude_header_test" + str(
+            datetime.datetime.now().strftime("%Y%m%d%H%M%S")
+        )
+    print("before patch:",anthropic_api_key)
+    with patch.dict(os.environ, {"ANTHROPIC_API_KEY": anthropic_api_key + "|invariant-auth: <not needed for test>"}):
+        print("after patch:",os.environ.get("ANTHROPIC_API_KEY"))
+        client = anthropic.Anthropic(
+                http_client=Client(),
+                base_url = f"{proxy_url}/api/v1/proxy/{dataset_name}/anthropic",
+        )
+        response = client.messages.create(
+            model="claude-3-5-sonnet-20241022",
+            max_tokens=1024,
+            messages=[
+                {
+                    "role": "user",
+                    "content": "Give me an introduction to Zurich within 200 words."
+                }
+            ]
+        )
+
+        assert response is not None
+        response_text = response.content[0].text
+        assert "zurich" in response_text.lower()
+
+        traces_response = await context.request.get(
+            f"{explorer_api_url}/api/v1/dataset/byuser/developer/{dataset_name}/traces"
+        )
+        traces = await traces_response.json()
+        assert len(traces) == 1
+
+        trace_id = traces[0]["id"]
+        get_trace_response = await context.request.get(
+            f"{explorer_api_url}/api/v1/trace/{trace_id}"
+        )
+        trace = await get_trace_response.json()
+        assert trace["messages"] == [
+            {
+                "role": "user",
+                "content": "Give me an introduction to Zurich within 200 words."
+            },
+            {
+                "role": "assistant",
+                "content": response_text
+            }
+        ]
\ No newline at end of file
diff --git a/tests/anthropic/test_anthropic_with_tool_call.py b/tests/anthropic/test_anthropic_with_tool_call.py
index 56be242..30ecf37 100644
--- a/tests/anthropic/test_anthropic_with_tool_call.py
+++ b/tests/anthropic/test_anthropic_with_tool_call.py
@@ -156,7 +156,7 @@ class WeatherAgent:
         return response
 
 @pytest.mark.skipif(not os.getenv("ANTHROPIC_API_KEY"), reason="No ANTHROPIC_API_KEY set")
-async def test_chat_completion_without_streaming(
+async def test_response_with_toolcall(
     context, explorer_api_url, proxy_url
 ):
     """Test the chat completion without streaming for the weather agent."""
@@ -213,7 +213,7 @@ async def test_chat_completion_without_streaming(
 
 
 @pytest.mark.skipif(not os.getenv("ANTHROPIC_API_KEY"), reason="No ANTHROPIC_API_KEY set")
-async def test_chat_completion_with_streaming(
+async def test_streaming_response_with_toolcall(
     context, explorer_api_url, proxy_url
 ):
     """Test the chat completion with streaming for the weather agent."""
diff --git a/tests/anthropic/test_anthropic_without_tool_call.py b/tests/anthropic/test_anthropic_without_tool_call.py
index 91995f6..a2d05f3 100644
--- a/tests/anthropic/test_anthropic_without_tool_call.py
+++ b/tests/anthropic/test_anthropic_without_tool_call.py
@@ -10,7 +10,7 @@ from util import *  # needed for pytest fixtures
 
 pytest_plugins = ("pytest_asyncio")
 @pytest.mark.skipif(not os.getenv("ANTHROPIC_API_KEY"), reason="No ANTHROPIC_API_KEY set")
-async def test_chat_completion_without_streaming(
+async def test_response_without_toolcall(
     context, explorer_api_url,proxy_url
 ):
     dataset_name = "claude_streaming_response_without_toolcall_test" + str(datetime.datetime.now().strftime("%Y%m%d%H%M%S"))
@@ -71,7 +71,8 @@ async def test_chat_completion_without_streaming(
 async def test_streaming_response_without_toolcall(
     context,
     explorer_api_url,
-    proxy_url):    
+    proxy_url
+    ):    
 
     dataset_name = "claude_streaming_response_without_toolcall_test" + str(datetime.datetime.now().strftime("%Y%m%d%H%M%S"))
     invariant_api_key = os.environ.get("INVARIANT_API_KEY","None")