diff --git a/tests/anthropic/test_anthropic_header_with_invariant_key.py b/tests/anthropic/test_anthropic_header_with_invariant_key.py
index bbe5bf2..d5304c9 100644
--- a/tests/anthropic/test_anthropic_header_with_invariant_key.py
+++ b/tests/anthropic/test_anthropic_header_with_invariant_key.py
@@ -19,9 +19,8 @@ pytest_plugins = ("pytest_asyncio",)
 @pytest.mark.skipif(
     not os.getenv("ANTHROPIC_API_KEY"), reason="No ANTHROPIC_API_KEY set"
 )
-@pytest.mark.parametrize("push_to_explorer", [False, True])
-async def test_proxy_with_invariant_key_in_anthropic_key(
-    context, proxy_url, explorer_api_url, push_to_explorer
+async def test_proxy_with_invariant_key_in_anthropic_key_header(
+    context, proxy_url, explorer_api_url
 ):
     """Test the Anthropic proxy with Invariant key in the Anthropic key"""
     anthropic_api_key = os.getenv("ANTHROPIC_API_KEY")
@@ -37,9 +36,7 @@ async def test_proxy_with_invariant_key_in_anthropic_key(
     ):
         client = anthropic.Anthropic(
             http_client=Client(),
-            base_url=f"{proxy_url}/api/v1/proxy/{dataset_name}/anthropic"
-            if push_to_explorer
-            else f"{proxy_url}/api/v1/proxy/anthropic",
+            base_url=f"{proxy_url}/api/v1/proxy/{dataset_name}/anthropic",
         )
         response = client.messages.create(
             model="claude-3-5-sonnet-20241022",
@@ -56,22 +53,21 @@ async def test_proxy_with_invariant_key_in_anthropic_key(
         response_text = response.content[0].text
         assert "zurich" in response_text.lower()
 
-        if push_to_explorer:
-            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
+        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, Switzerland within 200 words.",
-                },
-                {"role": "assistant", "content": response_text},
-            ]
+        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, Switzerland within 200 words.",
+            },
+            {"role": "assistant", "content": response_text},
+        ]
diff --git a/tests/open_ai/test_chat_without_tool_calls.py b/tests/open_ai/test_chat_without_tool_calls.py
index 692edba..c3355d4 100644
--- a/tests/open_ai/test_chat_without_tool_calls.py
+++ b/tests/open_ai/test_chat_without_tool_calls.py
@@ -5,6 +5,7 @@ import os
 import sys
 import uuid
 from pathlib import Path
+from unittest.mock import patch
 
 import pytest
 from httpx import Client
@@ -173,6 +174,59 @@ async def test_chat_completion_with_image(
             ]
 
 
+@pytest.mark.skipif(not os.getenv("OPENAI_API_KEY"), reason="No OPENAI_API_KEY set")
+async def test_chat_completion_with_invariant_key_in_openai_key_header(
+    context, explorer_api_url, proxy_url
+):
+    """Test the chat completions proxy calls with the Invariant API Key in the OpenAI Key header."""
+    dataset_name = "test-dataset-open-ai-" + str(uuid.uuid4())
+    openai_api_key = os.getenv("OPENAI_API_KEY")
+    with patch.dict(
+        os.environ,
+        {"OPENAI_API_KEY": openai_api_key + "|invariant-auth: <not needed for test>"},
+    ):
+        client = OpenAI(
+            http_client=Client(),
+            base_url=f"{proxy_url}/api/v1/proxy/{dataset_name}/openai",
+        )
+
+        chat_response = client.chat.completions.create(
+            model="gpt-4o",
+            messages=[{"role": "user", "content": "What is the capital of France?"}],
+            stream=False,
+        )
+
+        # Verify the chat response
+        assert "PARIS" in chat_response.choices[0].message.content.upper()
+        expected_assistant_message = chat_response.choices[0].message.content
+
+        # Fetch the trace ids for the dataset
+        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"]
+
+        # Fetch the trace
+        trace_response = await context.request.get(
+            f"{explorer_api_url}/api/v1/trace/{trace_id}"
+        )
+        trace = await trace_response.json()
+
+        # Verify the trace messages
+        assert trace["messages"] == [
+            {
+                "role": "user",
+                "content": "What is the capital of France?",
+            },
+            {
+                "role": "assistant",
+                "content": expected_assistant_message,
+            },
+        ]
+
+
 @pytest.mark.skip(reason="Skipping this test: OpenAI error scenario")
 @pytest.mark.parametrize("do_stream", [True, False])
 async def test_chat_completion_with_openai_exception(proxy_url, do_stream):