diff --git a/tests/components/guardian/conftest.py b/tests/components/guardian/conftest.py
index c7bffee4fff..acf59aeea86 100644
--- a/tests/components/guardian/conftest.py
+++ b/tests/components/guardian/conftest.py
@@ -1,6 +1,7 @@
 """Define fixtures for Elexa Guardian tests."""
+from collections.abc import Generator
 import json
-from unittest.mock import patch
+from unittest.mock import AsyncMock, patch
 
 import pytest
 
@@ -11,6 +12,15 @@ from homeassistant.setup import async_setup_component
 from tests.common import MockConfigEntry, load_fixture
 
 
+@pytest.fixture
+def mock_setup_entry() -> Generator[AsyncMock, None, None]:
+    """Override async_setup_entry."""
+    with patch(
+        "homeassistant.components.guardian.async_setup_entry", return_value=True
+    ) as mock_setup_entry:
+        yield mock_setup_entry
+
+
 @pytest.fixture(name="config_entry")
 def config_entry_fixture(hass, config, unique_id):
     """Define a config entry fixture."""
diff --git a/tests/components/guardian/test_config_flow.py b/tests/components/guardian/test_config_flow.py
index 2fdacdf29a7..cb28ea22a37 100644
--- a/tests/components/guardian/test_config_flow.py
+++ b/tests/components/guardian/test_config_flow.py
@@ -2,6 +2,7 @@
 from unittest.mock import patch
 
 from aioguardian.errors import GuardianError
+import pytest
 
 from homeassistant import data_entry_flow
 from homeassistant.components import dhcp, zeroconf
@@ -16,6 +17,8 @@ from homeassistant.core import HomeAssistant
 
 from tests.common import MockConfigEntry
 
+pytestmark = pytest.mark.usefixtures("mock_setup_entry")
+
 
 async def test_duplicate_error(
     hass: HomeAssistant, config, config_entry, setup_guardian