diff --git a/packages/http/httpx/kiota_http/httpx_request_adapter.py b/packages/http/httpx/kiota_http/httpx_request_adapter.py
index e7c3b20..23f1dfa 100644
--- a/packages/http/httpx/kiota_http/httpx_request_adapter.py
+++ b/packages/http/httpx/kiota_http/httpx_request_adapter.py
@@ -87,9 +87,7 @@ def __init__(
         if not http_client:
             http_client = KiotaClientFactory.create_with_default_middleware()
         self._http_client: httpx.AsyncClient = http_client
-        if not base_url:
-            base_url = str(http_client.base_url) if http_client.base_url is not None else ""
-        self._base_url: str = base_url
+        self._base_url: str = str(http_client.base_url) if http_client.base_url is not None else ""
         if not observability_options:
             observability_options = ObservabilityOptions()
         self.observability_options = observability_options
diff --git a/packages/http/httpx/tests/test_httpx_request_adapter.py b/packages/http/httpx/tests/test_httpx_request_adapter.py
index 67c622e..ab3e627 100644
--- a/packages/http/httpx/tests/test_httpx_request_adapter.py
+++ b/packages/http/httpx/tests/test_httpx_request_adapter.py
@@ -449,8 +449,11 @@ async def test_send_primitive_async_302_with_location_header_does_not_throw(
     assert "location" in resp.headers
     await request_adapter.send_primitive_async(request_info, "float", {})
 
+def test_httpx_request_adapter_ignores_base_url_parameter(auth_provider):
+    request_adapter = HttpxRequestAdapter(auth_provider, base_url="https://no.com")
+    assert request_adapter.base_url == ""
 
 def test_httpx_request_adapter_uses_http_client_base_url(auth_provider):
     http_client = httpx.AsyncClient(base_url=BASE_URL)
-    request_adapter = HttpxRequestAdapter(auth_provider, http_client=http_client)
+    request_adapter = HttpxRequestAdapter(auth_provider, http_client=http_client, base_url="https://no.com")
     assert request_adapter.base_url == BASE_URL