Spring test H2 truncates nanoseconds during consequente queries

I am using H2 in-memory database in Spring integration test.

I have following column on my entity

    @Column(nullable = false)
    private LocalDateTime lastUpdateDateTime;

However I noticed some problems in H2, sometimes it truncates nanoseconds part eg:

Saved datetime: 2020-07-02T13:36:40.459145400

After few moments 2020-07-02T13:36:40.459145

It seems that H2 is not able to store nanoseconds and just round up nanoseconds part.

My integration tests cannot pass because of this inconsistency. Could You please help ?