def METHOD_NAME(
    ocm_api: OCMBaseClient,
    cluster: OCMCluster,
    now: datetime,
) -> None:
    workload = "wl"
    org_upgrade_spec = build_organization_upgrade_spec(
        specs=[
            (
                cluster,
                build_upgrade_policy(workloads=[workload], soak_days=12),
            ),
        ],
    )
    diffs = base.calculate_diff(
        [],
        org_upgrade_spec,
        ocm_api,
        build_version_data(
            check_in=now,
            version=cluster.available_upgrades()[0],
            workload=workload,
            soak_days=11,
        ),
    )
    assert not diffs