diff --git a/homeassistant/components/cert_expiry/__init__.py b/homeassistant/components/cert_expiry/__init__.py
index babf81048df..22339b9f4c4 100644
--- a/homeassistant/components/cert_expiry/__init__.py
+++ b/homeassistant/components/cert_expiry/__init__.py
@@ -6,7 +6,7 @@ import logging
 from typing import Optional
 
 from homeassistant.config_entries import ConfigEntry
-from homeassistant.const import CONF_HOST, CONF_PORT
+from homeassistant.const import CONF_HOST, CONF_PORT, EVENT_HOMEASSISTANT_STARTED
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers.update_coordinator import DataUpdateCoordinator, UpdateFailed
 
@@ -27,7 +27,6 @@ async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
     port = entry.data[CONF_PORT]
 
     coordinator = CertExpiryDataUpdateCoordinator(hass, host, port)
-    await coordinator.async_config_entry_first_refresh()
 
     hass.data.setdefault(DOMAIN, {})
     hass.data[DOMAIN][entry.entry_id] = coordinator
@@ -35,7 +34,13 @@ async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
     if entry.unique_id is None:
         hass.config_entries.async_update_entry(entry, unique_id=f"{host}:{port}")
 
-    hass.config_entries.async_setup_platforms(entry, PLATFORMS)
+    async def async_finish_startup(_):
+        await coordinator.async_refresh()
+        hass.config_entries.async_setup_platforms(entry, PLATFORMS)
+
+    entry.async_on_unload(
+        hass.bus.async_listen_once(EVENT_HOMEASSISTANT_STARTED, async_finish_startup)
+    )
 
     return True
 
diff --git a/tests/components/cert_expiry/test_init.py b/tests/components/cert_expiry/test_init.py
index dbe5e74d891..25771c39250 100644
--- a/tests/components/cert_expiry/test_init.py
+++ b/tests/components/cert_expiry/test_init.py
@@ -9,6 +9,7 @@ from homeassistant.const import (
     CONF_HOST,
     CONF_PORT,
     EVENT_HOMEASSISTANT_START,
+    EVENT_HOMEASSISTANT_STARTED,
     STATE_UNAVAILABLE,
 )
 from homeassistant.setup import async_setup_component
@@ -87,6 +88,7 @@ async def test_unload_config_entry(mock_now, hass):
         return_value=timestamp,
     ):
         assert await async_setup_component(hass, DOMAIN, {}) is True
+        hass.bus.async_fire(EVENT_HOMEASSISTANT_STARTED)
         await hass.async_block_till_done()
 
     assert entry.state is ConfigEntryState.LOADED
diff --git a/tests/components/cert_expiry/test_sensors.py b/tests/components/cert_expiry/test_sensors.py
index 099fe78ca39..0ca228dc344 100644
--- a/tests/components/cert_expiry/test_sensors.py
+++ b/tests/components/cert_expiry/test_sensors.py
@@ -5,8 +5,13 @@ import ssl
 from unittest.mock import patch
 
 from homeassistant.components.cert_expiry.const import DOMAIN
-from homeassistant.config_entries import ConfigEntryState
-from homeassistant.const import CONF_HOST, CONF_PORT, STATE_UNAVAILABLE, STATE_UNKNOWN
+from homeassistant.const import (
+    CONF_HOST,
+    CONF_PORT,
+    EVENT_HOMEASSISTANT_STARTED,
+    STATE_UNAVAILABLE,
+    STATE_UNKNOWN,
+)
 from homeassistant.util.dt import utcnow
 
 from .const import HOST, PORT
@@ -32,6 +37,7 @@ async def test_async_setup_entry(mock_now, hass):
     ):
         entry.add_to_hass(hass)
         assert await hass.config_entries.async_setup(entry.entry_id)
+        hass.bus.async_fire(EVENT_HOMEASSISTANT_STARTED)
         await hass.async_block_till_done()
 
     state = hass.states.get("sensor.cert_expiry_timestamp_example_com")
@@ -56,6 +62,7 @@ async def test_async_setup_entry_bad_cert(hass):
     ):
         entry.add_to_hass(hass)
         assert await hass.config_entries.async_setup(entry.entry_id)
+        hass.bus.async_fire(EVENT_HOMEASSISTANT_STARTED)
         await hass.async_block_till_done()
 
     state = hass.states.get("sensor.cert_expiry_timestamp_example_com")
@@ -65,36 +72,6 @@ async def test_async_setup_entry_bad_cert(hass):
     assert not state.attributes.get("is_valid")
 
 
-async def test_async_setup_entry_host_unavailable(hass):
-    """Test async_setup_entry when host is unavailable."""
-    entry = MockConfigEntry(
-        domain=DOMAIN,
-        data={CONF_HOST: HOST, CONF_PORT: PORT},
-        unique_id=f"{HOST}:{PORT}",
-    )
-
-    with patch(
-        "homeassistant.components.cert_expiry.helper.get_cert",
-        side_effect=socket.gaierror,
-    ):
-        entry.add_to_hass(hass)
-        assert await hass.config_entries.async_setup(entry.entry_id) is False
-        await hass.async_block_till_done()
-
-    assert entry.state is ConfigEntryState.SETUP_RETRY
-
-    next_update = utcnow() + timedelta(seconds=45)
-    async_fire_time_changed(hass, next_update)
-    with patch(
-        "homeassistant.components.cert_expiry.helper.get_cert",
-        side_effect=socket.gaierror,
-    ):
-        await hass.async_block_till_done()
-
-    state = hass.states.get("sensor.cert_expiry_timestamp_example_com")
-    assert state is None
-
-
 async def test_update_sensor(hass):
     """Test async_update for sensor."""
     entry = MockConfigEntry(
@@ -112,6 +89,7 @@ async def test_update_sensor(hass):
     ):
         entry.add_to_hass(hass)
         assert await hass.config_entries.async_setup(entry.entry_id)
+        hass.bus.async_fire(EVENT_HOMEASSISTANT_STARTED)
         await hass.async_block_till_done()
 
     state = hass.states.get("sensor.cert_expiry_timestamp_example_com")
@@ -154,6 +132,7 @@ async def test_update_sensor_network_errors(hass):
     ):
         entry.add_to_hass(hass)
         assert await hass.config_entries.async_setup(entry.entry_id)
+        hass.bus.async_fire(EVENT_HOMEASSISTANT_STARTED)
         await hass.async_block_till_done()
 
     state = hass.states.get("sensor.cert_expiry_timestamp_example_com")