  Using 1.63 fb$^{-1}$ of integrated luminosity collected by the KLOE
experiment about $7\times 10^4$ $K_S \rightarrow \pi^{\pm}e^{\mp}\nu$ decays
have been reconstructed. The measured value of the charge asymmetry for this
decay is $A_S = (-4.9 \pm 5.7_{stat} \pm 2.6_{syst}) \times 10^{-3}$, which is
almost twice more precise than the previous KLOE result. The combination of
these two measurements gives $A_S = (-3.8 \pm 5.0_{stat} \pm 2.6_{syst}) \times
10^{-3}$ and, together with the asymmetry of the $K_L$ semileptonic decay,
provides significant tests of the CPT symmetry. The obtained results are in
agreement with CPT invariance.
