diff --git a/buildscripts/kokoro/xds-k8s.sh b/buildscripts/kokoro/xds-k8s.sh
index 44f9d77425c..bc0da15ba81 100755
--- a/buildscripts/kokoro/xds-k8s.sh
+++ b/buildscripts/kokoro/xds-k8s.sh
@@ -6,6 +6,7 @@ readonly GITHUB_REPOSITORY_NAME="grpc-java"
 # GKE Cluster
 readonly GKE_CLUSTER_NAME="interop-test-psm-sec-testing-api"
 readonly GKE_CLUSTER_ZONE="us-west1-b"
+export CLOUDSDK_API_ENDPOINT_OVERRIDES_CONTAINER="https://test-container.sandbox.googleapis.com/"
 ## xDS test server/client Docker images
 readonly SERVER_IMAGE_NAME="gcr.io/grpc-testing/xds-interop/java-server"
 readonly CLIENT_IMAGE_NAME="gcr.io/grpc-testing/xds-interop/java-client"