diff --git a/packages/http/httpx/kiota_http/httpx_request_adapter.py b/packages/http/httpx/kiota_http/httpx_request_adapter.py
index 11276110..9f379fe5 100644
--- a/packages/http/httpx/kiota_http/httpx_request_adapter.py
+++ b/packages/http/httpx/kiota_http/httpx_request_adapter.py
@@ -86,9 +86,9 @@ def __init__(
         self._serialization_writer_factory = serialization_writer_factory
         if not http_client:
             http_client = KiotaClientFactory.create_with_default_middleware()
-        self._http_client = http_client
+        self._http_client: httpx.AsyncClient = http_client
         if not base_url:
-            base_url = ""
+            base_url = str(http_client.base_url) if http_client.base_url is not None else ""
         self._base_url: str = base_url
         if not observability_options:
             observability_options = ObservabilityOptions()
@@ -101,7 +101,9 @@ def base_url(self) -> str:
         Returns:
             str: The base url
         """
-        return self._base_url
+        return self._base_url or str(
+            self._http_client.base_url
+        ) if self._http_client.base_url is not None else ""
 
     @base_url.setter
     def base_url(self, value: str) -> None:
diff --git a/packages/http/httpx/kiota_http/kiota_client_factory.py b/packages/http/httpx/kiota_http/kiota_client_factory.py
index 93481ecc..9d70d3ff 100644
--- a/packages/http/httpx/kiota_http/kiota_client_factory.py
+++ b/packages/http/httpx/kiota_http/kiota_client_factory.py
@@ -55,7 +55,7 @@ def create_with_default_middleware(
             instantiating default middleware. Defaults to dict[str, RequestOption]=None.
 
         Returns:
-            httpx.AsycClient: An instance of the AsyncClient object
+            httpx.AsyncClient: An instance of the AsyncClient object
         """
 
         kiota_async_client = KiotaClientFactory.get_default_client() if client is None else client
diff --git a/packages/http/httpx/tests/middleware_tests/test_retry_handler.py b/packages/http/httpx/tests/middleware_tests/test_retry_handler.py
index de7dd4f9..e576ac0c 100644
--- a/packages/http/httpx/tests/middleware_tests/test_retry_handler.py
+++ b/packages/http/httpx/tests/middleware_tests/test_retry_handler.py
@@ -224,7 +224,7 @@ def request_handler(request: httpx.Request):
             return httpx.Response(200, )
         return httpx.Response(
             TOO_MANY_REQUESTS,
-            headers={RETRY_AFTER: "200"}, # value exceeds max delay of 180 secs
+            headers={RETRY_AFTER: "200"},  # value exceeds max delay of 180 secs
         )
 
     # Retry-after value takes precedence over the RetryHandlerOption value specified here
@@ -238,6 +238,7 @@ def request_handler(request: httpx.Request):
     assert resp.status_code == 429
     assert RETRY_ATTEMPT not in resp.request.headers
 
+
 @pytest.mark.asyncio
 async def test_max_retries_respected():
     """Test that a request is not retried more than max_retries configured"""
@@ -245,16 +246,14 @@ async def test_max_retries_respected():
     def request_handler(request: httpx.Request):
         if RETRY_ATTEMPT in request.headers:
             return httpx.Response(200, )
-        return httpx.Response(
-            TOO_MANY_REQUESTS,
-        )
+        return httpx.Response(TOO_MANY_REQUESTS, )
 
     # Retry-after value takes precedence over the RetryHandlerOption value specified here
     handler = RetryHandler(RetryHandlerOption(10, 3, True))
     request = httpx.Request(
         'GET',
         BASE_URL,
-        headers={RETRY_ATTEMPT: '5'} # value exceeds max retries configured
+        headers={RETRY_ATTEMPT: '5'}  # value exceeds max retries configured
     )
     mock_transport = httpx.MockTransport(request_handler)
     resp = await handler.send(request, mock_transport)
@@ -262,6 +261,7 @@ def request_handler(request: httpx.Request):
     assert RETRY_ATTEMPT in resp.request.headers
     assert resp.request.headers[RETRY_ATTEMPT] == '5'
 
+
 @pytest.mark.asyncio
 async def test_retry_options_apply_per_request():
     """Test that a request options are applied per request"""
diff --git a/packages/http/httpx/tests/test_httpx_request_adapter.py b/packages/http/httpx/tests/test_httpx_request_adapter.py
index 0df147ec..20757cec 100644
--- a/packages/http/httpx/tests/test_httpx_request_adapter.py
+++ b/packages/http/httpx/tests/test_httpx_request_adapter.py
@@ -400,3 +400,9 @@ async def test_retries_on_cae_failure(
         ),
     ]
     request_adapter._authentication_provider.authenticate_request.assert_has_awaits(calls)
+
+
+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)
+    assert request_adapter.base_url == BASE_URL