diff --git a/miio/tests/test_waterpurifier.py b/miio/tests/test_waterpurifier.py
index db45cdda1..3467859a5 100644
--- a/miio/tests/test_waterpurifier.py
+++ b/miio/tests/test_waterpurifier.py
@@ -9,6 +9,23 @@ class DummyWaterPurifier(DummyDevice, WaterPurifier):
     def __init__(self, *args, **kwargs):
         self.state = {
             'power': 'on',
+            'mode': 'unknown',
+            'tds': 'unknown',
+            'filter1_life': -1,
+            'filter1_state': -1,
+            'filter_life': -1,
+            'filter_state': -1,
+            'life': -1,
+            'state': -1,
+            'level': 'unknown',
+            'volume': 'unknown',
+            'filter': 'unknown',
+            'usage': 'unknown',
+            'temperature': 'unknown',
+            'uv_life': -1,
+            'uv_state': -1,
+            'elecval_state': 'unknown'
+
         }
         self.return_values = {
             'get_prop': self._get_state,