diff --git a/homeassistant/components/nextbus/sensor.py b/homeassistant/components/nextbus/sensor.py
index f9df0d60412..3756c1853b7 100644
--- a/homeassistant/components/nextbus/sensor.py
+++ b/homeassistant/components/nextbus/sensor.py
@@ -218,6 +218,4 @@ class NextBusDepartureSensor(SensorEntity):
         )
 
         latest_prediction = maybe_first(predictions)
-        self._state = utc_from_timestamp(
-            int(latest_prediction["epochTime"]) / 1000
-        ).isoformat()
+        self._state = utc_from_timestamp(int(latest_prediction["epochTime"]) / 1000)