diff --git a/tests/components/google/test_diagnostics.py b/tests/components/google/test_diagnostics.py
index 5d6259309b8..78eb6d7ceea 100644
--- a/tests/components/google/test_diagnostics.py
+++ b/tests/components/google/test_diagnostics.py
@@ -11,7 +11,6 @@ from syrupy.assertion import SnapshotAssertion
 
 from homeassistant.auth.models import Credentials
 from homeassistant.core import HomeAssistant
-from homeassistant.setup import async_setup_component
 
 from .conftest import TEST_EVENT, ApiResult, ComponentSetup
 
@@ -55,12 +54,6 @@ def _get_test_client_generator(
     return auth_client
 
 
-@pytest.fixture(autouse=True)
-async def setup_diag(hass):
-    """Set up diagnostics platform."""
-    assert await async_setup_component(hass, "diagnostics", {})
-
-
 @freeze_time("2023-03-13 12:05:00-07:00")
 @pytest.mark.usefixtures("socket_enabled")
 async def test_diagnostics(
diff --git a/tests/components/local_calendar/test_diagnostics.py b/tests/components/local_calendar/test_diagnostics.py
index ed12391f8a9..30c857dad98 100644
--- a/tests/components/local_calendar/test_diagnostics.py
+++ b/tests/components/local_calendar/test_diagnostics.py
@@ -7,7 +7,6 @@ from syrupy.assertion import SnapshotAssertion
 
 from homeassistant.auth.models import Credentials
 from homeassistant.core import HomeAssistant
-from homeassistant.setup import async_setup_component
 
 from .conftest import TEST_ENTITY, Client
 
@@ -41,12 +40,6 @@ def _get_test_client_generator(
     return auth_client
 
 
-@pytest.fixture(autouse=True)
-async def setup_diag(hass):
-    """Set up diagnostics platform."""
-    assert await async_setup_component(hass, "diagnostics", {})
-
-
 @freeze_time("2023-03-13 12:05:00-07:00")
 @pytest.mark.usefixtures("socket_enabled")
 async def test_empty_calendar(