diff --git a/homeassistant/components/cert_expiry/icons.json b/homeassistant/components/cert_expiry/icons.json
new file mode 100644
index 00000000000..9d86e701997
--- /dev/null
+++ b/homeassistant/components/cert_expiry/icons.json
@@ -0,0 +1,9 @@
+{
+  "entity": {
+    "sensor": {
+      "certificate_expiry": {
+        "default": "mdi:certificate"
+      }
+    }
+  }
+}
diff --git a/homeassistant/components/cert_expiry/sensor.py b/homeassistant/components/cert_expiry/sensor.py
index 68e18fddc14..3e171006bdc 100644
--- a/homeassistant/components/cert_expiry/sensor.py
+++ b/homeassistant/components/cert_expiry/sensor.py
@@ -77,7 +77,6 @@ async def async_setup_entry(
 class CertExpiryEntity(CoordinatorEntity[CertExpiryDataUpdateCoordinator]):
     """Defines a base Cert Expiry entity."""
 
-    _attr_icon = "mdi:certificate"
     _attr_has_entity_name = True
 
     @property