1.5 version cacerts openssl verify

Hello,

I am trying to verify using openssl command if a cert is valid using root cert:

openssl verify -verbose -CAfile <((kubectl -n istio-system get secret cacerts -o json | ConvertFrom-Json).‘data.cert-chain.pem’ | base64 -d -) <((kubectl -n istio-system get secret istio.istio-mixer-service-account -o json | ConvertFrom-Json).‘data.cert-chain.pem’ | base64 -d -)

The command will work in Istio 1.4 version. I am trying to do the same in 1.5 version. How can i test this?