diff --git a/homeassistant/components/binary_sensor/bayesian.py b/homeassistant/components/binary_sensor/bayesian.py
index 4c62735a6f9fbe..ac328fd1f41e4c 100644
--- a/homeassistant/components/binary_sensor/bayesian.py
+++ b/homeassistant/components/binary_sensor/bayesian.py
@@ -126,7 +126,6 @@ def async_threshold_sensor_state_listener(entity, old_state,
             self.watchers[platform](entity_obs)
 
             prior = self.prior
-            print(self.current_obs.values())
             for obs in self.current_obs.values():
                 prior = update_probability(prior, obs['prob_true'],
                                            obs['prob_false'])
@@ -201,7 +200,7 @@ def device_state_attributes(self):
         """Return the state attributes of the sensor."""
         return {
             'observations': [val for val in self.current_obs.values()],
-            'probability': self.probability,
+            'probability': round(self.probability, 2),
             'probability_threshold': self._probability_threshold
         }
 
diff --git a/tests/components/binary_sensor/test_bayesian.py b/tests/components/binary_sensor/test_bayesian.py
index f86047f3a3df47..61b110f247f099 100644
--- a/tests/components/binary_sensor/test_bayesian.py
+++ b/tests/components/binary_sensor/test_bayesian.py
@@ -73,7 +73,7 @@ def test_sensor_numeric_state(self):
             'prob_false': 0.1,
             'prob_true': 0.9
         }], state.attributes.get('observations'))
-        self.assertAlmostEqual(0.7714285714285715,
+        self.assertAlmostEqual(0.77,
                                state.attributes.get('probability'))
 
         assert state.state == 'on'
@@ -141,7 +141,7 @@ def test_sensor_state(self):
             'prob_true': 0.8,
             'prob_false': 0.4
         }], state.attributes.get('observations'))
-        self.assertAlmostEqual(0.33333333, state.attributes.get('probability'))
+        self.assertAlmostEqual(0.33, state.attributes.get('probability'))
 
         assert state.state == 'on'