diff --git a/homeassistant/helpers/aiohttp_client.py b/homeassistant/helpers/aiohttp_client.py
index 2e56698db41..2ef96091d15 100644
--- a/homeassistant/helpers/aiohttp_client.py
+++ b/homeassistant/helpers/aiohttp_client.py
@@ -14,7 +14,6 @@ from aiohttp import web
 from aiohttp.hdrs import CONTENT_TYPE, USER_AGENT
 from aiohttp.web_exceptions import HTTPBadGateway, HTTPGatewayTimeout
 import async_timeout
-import orjson
 
 from homeassistant import config_entries
 from homeassistant.const import EVENT_HOMEASSISTANT_CLOSE, __version__
@@ -23,6 +22,7 @@ from homeassistant.loader import bind_hass
 from homeassistant.util import ssl as ssl_util
 
 from .frame import warn_use
+from .json import json_dumps
 
 DATA_CONNECTOR = "aiohttp_connector"
 DATA_CONNECTOR_NOTVERIFY = "aiohttp_connector_notverify"
@@ -98,7 +98,7 @@ def _async_create_clientsession(
     """Create a new ClientSession with kwargs, i.e. for cookies."""
     clientsession = aiohttp.ClientSession(
         connector=_async_get_connector(hass, verify_ssl),
-        json_serialize=lambda x: orjson.dumps(x).decode("utf-8"),
+        json_serialize=json_dumps,
         **kwargs,
     )
     # Prevent packages accidentally overriding our default headers
diff --git a/tests/helpers/test_aiohttp_client.py b/tests/helpers/test_aiohttp_client.py
index 599b2c6984e..1ffb4267167 100644
--- a/tests/helpers/test_aiohttp_client.py
+++ b/tests/helpers/test_aiohttp_client.py
@@ -19,6 +19,7 @@ from homeassistant.const import (
 )
 from homeassistant.core import EVENT_HOMEASSISTANT_CLOSE
 import homeassistant.helpers.aiohttp_client as client
+from homeassistant.util.color import RGBColor
 
 from tests.common import MockConfigEntry
 
@@ -215,6 +216,16 @@ async def test_async_aiohttp_proxy_stream_client_err(aioclient_mock, camera_clie
     assert resp.status == 502
 
 
+async def test_sending_named_tuple(hass, aioclient_mock):
+    """Test sending a named tuple in json."""
+    resp = aioclient_mock.post("http://127.0.0.1/rgb", json={"rgb": RGBColor(4, 3, 2)})
+    session = client.async_create_clientsession(hass)
+    resp = await session.post("http://127.0.0.1/rgb", json={"rgb": RGBColor(4, 3, 2)})
+    assert resp.status == 200
+    await resp.json() == {"rgb": RGBColor(4, 3, 2)}
+    aioclient_mock.mock_calls[0][2]["rgb"] == RGBColor(4, 3, 2)
+
+
 async def test_client_session_immutable_headers(hass):
     """Test we can't mutate headers."""
     session = client.async_get_clientsession(hass)
diff --git a/tests/helpers/test_json.py b/tests/helpers/test_json.py
index 54c488690fa..1e85338f152 100644
--- a/tests/helpers/test_json.py
+++ b/tests/helpers/test_json.py
@@ -2,6 +2,7 @@
 import datetime
 import json
 import time
+from typing import NamedTuple
 
 import pytest
 
@@ -13,6 +14,7 @@ from homeassistant.helpers.json import (
     json_dumps_sorted,
 )
 from homeassistant.util import dt as dt_util
+from homeassistant.util.color import RGBColor
 
 
 @pytest.mark.parametrize("encoder", (JSONEncoder, ExtendedJSONEncoder))
@@ -96,3 +98,23 @@ def test_json_dumps_tuple_subclass():
     tt = time.struct_time((1999, 3, 17, 32, 44, 55, 2, 76, 0))
 
     assert json_dumps(tt) == "[1999,3,17,32,44,55,2,76,0]"
+
+
+def test_json_dumps_named_tuple_subclass():
+    """Test the json dumps a tuple subclass."""
+
+    class NamedTupleSubclass(NamedTuple):
+        """A NamedTuple subclass."""
+
+        name: str
+
+    nts = NamedTupleSubclass("a")
+
+    assert json_dumps(nts) == '["a"]'
+
+
+def test_json_dumps_rgb_color_subclass():
+    """Test the json dumps of RGBColor."""
+    rgb = RGBColor(4, 2, 1)
+
+    assert json_dumps(rgb) == "[4,2,1]"
diff --git a/tests/test_util/aiohttp.py b/tests/test_util/aiohttp.py
index 9ed47109210..4ed81a3a577 100644
--- a/tests/test_util/aiohttp.py
+++ b/tests/test_util/aiohttp.py
@@ -111,7 +111,7 @@ class AiohttpClientMocker:
 
     def create_session(self, loop):
         """Create a ClientSession that is bound to this mocker."""
-        session = ClientSession(loop=loop)
+        session = ClientSession(loop=loop, json_serialize=json_dumps)
         # Setting directly on `session` will raise deprecation warning
         object.__setattr__(session, "_request", self.match_request)
         return session