diff --git a/homeassistant/components/binary_sensor/arest.py b/homeassistant/components/binary_sensor/arest.py
index efa6043a035..972d9ca835c 100644
--- a/homeassistant/components/binary_sensor/arest.py
+++ b/homeassistant/components/binary_sensor/arest.py
@@ -51,7 +51,7 @@ def setup_platform(hass, config, add_devices, discovery_info=None):
 
     add_devices([ArestBinarySensor(
         arest, resource, config.get(CONF_NAME, response[CONF_NAME]),
-        device_class, pin)])
+        device_class, pin)], True)
 
 
 class ArestBinarySensor(BinarySensorDevice):
@@ -64,7 +64,6 @@ class ArestBinarySensor(BinarySensorDevice):
         self._name = name
         self._device_class = device_class
         self._pin = pin
-        self.update()
 
         if self._pin is not None:
             request = requests.get(
diff --git a/homeassistant/components/sensor/arest.py b/homeassistant/components/sensor/arest.py
index 6edef785280..b7e224a7447 100644
--- a/homeassistant/components/sensor/arest.py
+++ b/homeassistant/components/sensor/arest.py
@@ -102,7 +102,7 @@ def setup_platform(hass, config, add_devices, discovery_info=None):
                 pin=pinnum, unit_of_measurement=pin.get(
                     CONF_UNIT_OF_MEASUREMENT), renderer=renderer))
 
-    add_devices(dev)
+    add_devices(dev, True)
 
 
 class ArestSensor(Entity):
@@ -119,7 +119,6 @@ class ArestSensor(Entity):
         self._state = STATE_UNKNOWN
         self._unit_of_measurement = unit_of_measurement
         self._renderer = renderer
-        self.update()
 
         if self._pin is not None:
             request = requests.get(