Refresh sensor template don't work

Hello everybody.
I am desperate. I’m trying to create my own sensor, which should update itself in dependence of the time. I have already read all about it, but I can’t find a solution.
I have configured the time_date platform. I add the sensor.time entity to refresh the sensor. Now I want to create a senor, which always shows me the current minute. Unfortunately the value does not update.

sensor:
  - platform: time_date
    display_options:
      - 'time'
      - 'date'
      - 'date_time'
      - 'date_time_utc'
      - 'date_time_iso'
      - 'time_date'
      - 'time_utc'
      - 'beat'
  - platform: template
    sensors:
      test_value:
        entity_id: sensor.time
        value_template: '{{ now().minute }}'
        friendly_name: 'TestValue'

When I restart home assistant, I look at the current states in the developer tools. However, the value does not change after the restart and remains at the minute I restarted. Can somebody help me?

Which version of HA are you using.normally this sensor should update once a minute simce 0.1116 or 0.117.

i using 0.116.2. I try an update.

It works…OK…thx!!!