diff --git a/.kokoro/psm_interop_kokoro_lib.sh b/.kokoro/psm_interop_kokoro_lib.sh
index 51d68308..ad5bb10e 100644
--- a/.kokoro/psm_interop_kokoro_lib.sh
+++ b/.kokoro/psm_interop_kokoro_lib.sh
@@ -211,6 +211,7 @@ psm::dualstack::run_test() {
 #######################################
 psm::fallback::setup() {
   NO_GKE_CLUSTER=1
+  gcloud -q auth configure-docker "${DOCKER_REGISTRY}"
 }
 
 #######################################