diff --git a/tests/conftest.py b/tests/conftest.py
index 1d4699647c9..161ff458ac0 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -5,6 +5,7 @@ from __future__ import annotations
 import asyncio
 from collections.abc import Callable, Coroutine
 from contextlib import asynccontextmanager, contextmanager
+import datetime
 import functools
 import gc
 import itertools
@@ -76,7 +77,7 @@ from homeassistant.helpers.dispatcher import async_dispatcher_send
 from homeassistant.helpers.translation import _TranslationsCacheData
 from homeassistant.helpers.typing import ConfigType
 from homeassistant.setup import BASE_PLATFORMS, async_setup_component
-from homeassistant.util import location
+from homeassistant.util import dt as dt_util, location
 from homeassistant.util.async_ import create_eager_task
 from homeassistant.util.json import json_loads
 
@@ -385,6 +386,13 @@ def verify_cleanup(
             "waitpid-"
         )
 
+    try:
+        # Verify the default time zone has been restored
+        assert dt_util.DEFAULT_TIME_ZONE is datetime.UTC
+    finally:
+        # Restore the default time zone to not break subsequent tests
+        dt_util.DEFAULT_TIME_ZONE = datetime.UTC
+
 
 @pytest.fixture(autouse=True)
 def reset_hass_threading_local_object() -> Generator[None]: