diff --git a/homeassistant/components/google_assistant/const.py b/homeassistant/components/google_assistant/const.py
index efeb62deb8e..db0916fab02 100644
--- a/homeassistant/components/google_assistant/const.py
+++ b/homeassistant/components/google_assistant/const.py
@@ -62,6 +62,7 @@ DEFAULT_EXPOSED_DOMAINS = [
     "vacuum",
 ]
 
+# https://developers.google.com/assistant/smarthome/guides
 PREFIX_TYPES = "action.devices.types."
 TYPE_CAMERA = f"{PREFIX_TYPES}CAMERA"
 TYPE_LIGHT = f"{PREFIX_TYPES}LIGHT"
@@ -85,6 +86,7 @@ TYPE_SETTOP = f"{PREFIX_TYPES}SETTOP"
 TYPE_HUMIDIFIER = f"{PREFIX_TYPES}HUMIDIFIER"
 TYPE_DEHUMIDIFIER = f"{PREFIX_TYPES}DEHUMIDIFIER"
 TYPE_RECEIVER = f"{PREFIX_TYPES}AUDIO_VIDEO_RECEIVER"
+TYPE_CURTAIN = f"{PREFIX_TYPES}CURTAIN"
 
 SERVICE_REQUEST_SYNC = "request_sync"
 HOMEGRAPH_URL = "https://homegraph.googleapis.com/"
@@ -149,6 +151,7 @@ DEVICE_CLASS_TO_GOOGLE_TYPES = {
     (cover.DOMAIN, cover.CoverDeviceClass.DOOR): TYPE_DOOR,
     (cover.DOMAIN, cover.CoverDeviceClass.AWNING): TYPE_AWNING,
     (cover.DOMAIN, cover.CoverDeviceClass.SHUTTER): TYPE_SHUTTER,
+    (cover.DOMAIN, cover.CoverDeviceClass.CURTAIN): TYPE_CURTAIN,
     (switch.DOMAIN, switch.SwitchDeviceClass.SWITCH): TYPE_SWITCH,
     (switch.DOMAIN, switch.SwitchDeviceClass.OUTLET): TYPE_OUTLET,
     (binary_sensor.DOMAIN, binary_sensor.BinarySensorDeviceClass.DOOR): TYPE_DOOR,
diff --git a/tests/components/google_assistant/test_smart_home.py b/tests/components/google_assistant/test_smart_home.py
index 911f66bb428..a97333f40e4 100644
--- a/tests/components/google_assistant/test_smart_home.py
+++ b/tests/components/google_assistant/test_smart_home.py
@@ -1021,10 +1021,14 @@ async def test_device_class_binary_sensor(hass, device_class, google_type):
         ("non_existing_class", "action.devices.types.BLINDS"),
         ("door", "action.devices.types.DOOR"),
         ("garage", "action.devices.types.GARAGE"),
+        ("gate", "action.devices.types.GARAGE"),
+        ("awning", "action.devices.types.AWNING"),
+        ("shutter", "action.devices.types.SHUTTER"),
+        ("curtain", "action.devices.types.CURTAIN"),
     ],
 )
 async def test_device_class_cover(hass, device_class, google_type):
-    """Test that a binary entity syncs to the correct device type."""
+    """Test that a cover entity syncs to the correct device type."""
     sensor = DemoCover(None, hass, "Demo Sensor", device_class=device_class)
     sensor.hass = hass
     sensor.entity_id = "cover.demo_sensor"