Fix CI pipeline

[achrinza]

As mentioned in #471 (review), issue is to track fixing the CI pipeline.

[forno]

I believe that it's come by JST(+9:00).

  1) MySQL datetime handling
       should allow use of fractional seconds:

      AssertionError: expected '1971-06-22T03:34:56.789Z' to equal '1971-06-22T12:34:56.789Z'
      + expected - actual

      -1971-06-22T03:34:56.789Z
      +1971-06-22T12:34:56.789Z

However, I don't know others.