diff --git a/homeassistant/components/smartthings/cover.py b/homeassistant/components/smartthings/cover.py
index 131da75f4fe..53602c3643c 100644
--- a/homeassistant/components/smartthings/cover.py
+++ b/homeassistant/components/smartthings/cover.py
@@ -135,6 +135,8 @@ class SmartThingsCover(SmartThingsEntity, CoverDevice):
     @property
     def current_cover_position(self):
         """Return current position of cover."""
+        if not self._supported_features & SUPPORT_SET_POSITION:
+            return None
         return self._device.status.level
 
     @property
diff --git a/tests/components/smartthings/test_cover.py b/tests/components/smartthings/test_cover.py
index 7e41237e3e7..fb90882eae8 100644
--- a/tests/components/smartthings/test_cover.py
+++ b/tests/components/smartthings/test_cover.py
@@ -142,7 +142,10 @@ async def test_set_cover_position_unsupported(hass, device_factory):
         COVER_DOMAIN, SERVICE_SET_COVER_POSITION,
         {ATTR_POSITION: 50}, blocking=True)
 
-    # Ensure API was notcalled
+    state = hass.states.get('cover.shade')
+    assert ATTR_CURRENT_POSITION not in state.attributes
+
+    # Ensure API was not called
     # pylint: disable=protected-access
     assert device._api.post_device_command.call_count == 0  # type: ignore