  CIEMAT-QI4 is a quasi-isodynamic stellarator configuration that
simultaneously features very good fast-ion confinement in a broad range of
$\beta$ values, low neoclassical transport and bootstrap current, and ideal
magnetohydrodynamic stability up to $\beta=5\%$. In this paper it is shown that
CIEMAT-QI4 also exhibits reduced turbulent transport. This is demonstrated
through nonlinear electrostatic simulations with the gyrokinetic code stella,
including kinetic ions and electrons. The relation between reduced turbulent
transport and the fact that CIEMAT-QI4 very approximately satisfies the
so-called maximum-J property is discussed.
