diff --git a/tools/internal_ci/linux/grpc_xds_k8s.sh b/tools/internal_ci/linux/grpc_xds_k8s.sh
index 0ccc0370acb..6bcb40b182f 100755
--- a/tools/internal_ci/linux/grpc_xds_k8s.sh
+++ b/tools/internal_ci/linux/grpc_xds_k8s.sh
@@ -44,6 +44,7 @@ build_test_app_docker_images() {
   echo "Building C++ xDS interop test app Docker images"
   docker build -f "${SRC_DIR}/tools/dockerfile/interoptest/grpc_interop_cxx_xds/Dockerfile.xds_client" -t "${CLIENT_IMAGE_NAME}" "${SRC_DIR}"
   docker build -f "${SRC_DIR}/tools/dockerfile/interoptest/grpc_interop_cxx_xds/Dockerfile.xds_server" -t "${SERVER_IMAGE_NAME}" "${SRC_DIR}"
+  gcloud -q auth configure-docker
   docker push "${CLIENT_IMAGE_NAME}"
   docker push "${SERVER_IMAGE_NAME}"
 }