After checking some jobs run I saw that some of the failures that can happen during the test execution of the test suite are not causing the prow job fails. For example:
https://prow.ci.openshift.org/view/gs/test-platform-results/pr-logs/pull/openshift-service-mesh_istio/27/pull-ci-openshift-service-mesh-istio-master-istio-integration-pilot/1793289550475300864

This can be happening because of the use of a custom script to run the test over OCP. We need to check what is causing this behaviour