diff --git a/homeassistant/components/frontend/www_static/home-assistant-polymer b/homeassistant/components/frontend/www_static/home-assistant-polymer
index af4af1e9332af..77f4dd1fed3d2 160000
--- a/homeassistant/components/frontend/www_static/home-assistant-polymer
+++ b/homeassistant/components/frontend/www_static/home-assistant-polymer
@@ -1 +1 @@
-Subproject commit af4af1e9332afef90d25d61589840d239baf7ded
+Subproject commit 77f4dd1fed3d29c7ad8960c704a748af80748a59
diff --git a/tests/components/device_tracker/test_owntracks.py b/tests/components/device_tracker/test_owntracks.py
index 16fb1c4a4ce6d..a539afe02f307 100644
--- a/tests/components/device_tracker/test_owntracks.py
+++ b/tests/components/device_tracker/test_owntracks.py
@@ -108,6 +108,31 @@
     '_type': 'transition'}
 
 
+REGION_ENTER_ZERO_MESSAGE = {
+    'lon': 1.0,
+    'event': 'enter',
+    'tid': 'user',
+    'desc': 'inner',
+    'wtst': 1,
+    't': 'b',
+    'acc': 0,
+    'tst': 2,
+    'lat': 2.0,
+    '_type': 'transition'}
+
+REGION_LEAVE_ZERO_MESSAGE = {
+    'lon': 10.0,
+    'event': 'leave',
+    'tid': 'user',
+    'desc': 'inner',
+    'wtst': 1,
+    't': 'b',
+    'acc': 0,
+    'tst': 2,
+    'lat': 20.0,
+    '_type': 'transition'}
+
+
 class TestDeviceTrackerOwnTracks(unittest.TestCase):
     """Test the OwnTrack sensor."""
 
@@ -293,6 +318,24 @@ def test_event_entry_exit_inaccurate(self):
         # But does exit region correctly
         self.assertFalse(owntracks.REGIONS_ENTERED[USER])
 
+    def test_event_entry_exit_zero_accuracy(self):
+        self.send_message(EVENT_TOPIC, REGION_ENTER_ZERO_MESSAGE)
+
+        # Enter uses the zone's gps co-ords
+        self.assert_location_latitude(2.1)
+        self.assert_location_accuracy(10.0)
+        self.assert_location_state('inner')
+
+        self.send_message(EVENT_TOPIC, REGION_LEAVE_ZERO_MESSAGE)
+
+        # Exit doesn't use zero gps
+        self.assert_location_latitude(2.1)
+        self.assert_location_accuracy(10.0)
+        self.assert_location_state('inner')
+
+        # But does exit region correctly
+        self.assertFalse(owntracks.REGIONS_ENTERED[USER])
+
     def test_event_exit_outside_zone_sets_away(self):
         """Test the event for exit zone."""
         self.send_message(EVENT_TOPIC, REGION_ENTER_MESSAGE)