diff --git a/homeassistant/components/repetier/sensor.py b/homeassistant/components/repetier/sensor.py
index 393d8a16ae3..25c70cc2960 100644
--- a/homeassistant/components/repetier/sensor.py
+++ b/homeassistant/components/repetier/sensor.py
@@ -160,7 +160,7 @@ class RepetierJobEndSensor(RepetierSensor):
         print_time = data["print_time"]
         from_start = data["from_start"]
         time_end = start + round(print_time, 0)
-        self._state = datetime.utcfromtimestamp(time_end).isoformat()
+        self._state = datetime.utcfromtimestamp(time_end)
         remaining = print_time - from_start
         remaining_secs = int(round(remaining, 0))
         _LOGGER.debug(
@@ -182,7 +182,7 @@ class RepetierJobStartSensor(RepetierSensor):
         job_name = data["job_name"]
         start = data["start"]
         from_start = data["from_start"]
-        self._state = datetime.utcfromtimestamp(start).isoformat()
+        self._state = datetime.utcfromtimestamp(start)
         elapsed_secs = int(round(from_start, 0))
         _LOGGER.debug(
             "Job %s elapsed %s",