diff --git a/.kokoro/continuous/node14/system-test.cfg b/.kokoro/continuous/node14/system-test.cfg
index 9ba9ad1c7..c7c9507a8 100644
--- a/.kokoro/continuous/node14/system-test.cfg
+++ b/.kokoro/continuous/node14/system-test.cfg
@@ -8,5 +8,5 @@ env_vars: {
 
 env_vars: {
   key: "SECRET_MANAGER_KEYS"
-  value: "long-door-651-kokoro-system-test-service-account"
+  value: "long-door-651-kokoro-system-test-service-account,client-library-test-universe-domain-credential"
 }
\ No newline at end of file
diff --git a/.kokoro/presubmit/node14/system-test.cfg b/.kokoro/presubmit/node14/system-test.cfg
index 9ba9ad1c7..c7c9507a8 100644
--- a/.kokoro/presubmit/node14/system-test.cfg
+++ b/.kokoro/presubmit/node14/system-test.cfg
@@ -8,5 +8,5 @@ env_vars: {
 
 env_vars: {
   key: "SECRET_MANAGER_KEYS"
-  value: "long-door-651-kokoro-system-test-service-account"
+  value: "long-door-651-kokoro-system-test-service-account,client-library-test-universe-domain-credential"
 }
\ No newline at end of file
diff --git a/.kokoro/release/publish.cfg b/.kokoro/release/publish.cfg
index baea5db3c..019cc24a5 100644
--- a/.kokoro/release/publish.cfg
+++ b/.kokoro/release/publish.cfg
@@ -18,7 +18,7 @@ before_action {
 
 env_vars: {
   key: "SECRET_MANAGER_KEYS"
-  value: "releasetool-publish-reporter-app,releasetool-publish-reporter-googleapis-installation,releasetool-publish-reporter-pem"
+  value: "releasetool-publish-reporter-app,releasetool-publish-reporter-googleapis-installation,releasetool-publish-reporter-pem,client-library-test-universe-domain-credential"
 }
 
 # Download trampoline resources.
diff --git a/.kokoro/system-test.sh b/.kokoro/system-test.sh
index 0b3043d26..e219954ae 100755
--- a/.kokoro/system-test.sh
+++ b/.kokoro/system-test.sh
@@ -22,6 +22,12 @@ export NPM_CONFIG_PREFIX=${HOME}/.npm-global
 export GOOGLE_APPLICATION_CREDENTIALS=${KOKORO_GFILE_DIR}/secret_manager/long-door-651-kokoro-system-test-service-account
 export GCLOUD_PROJECT=long-door-651
 
+# For universe domain testing
+export TEST_UNIVERSE_DOMAIN_CREDENTIAL=${KOKORO_GFILE_DIR}/secret_manager/client-library-test-universe-domain-credential
+export TEST_UNIVERSE_DOMAIN=$(gcloud secrets versions access latest --project cloud-devrel-kokoro-resources --secret=client-library-test-universe-domain)
+export TEST_UNIVERSE_PROJECT_ID=$(gcloud secrets versions access latest --project cloud-devrel-kokoro-resources --secret=client-library-test-universe-project-id)
+export TEST_UNIVERSE_LOCATION=$(gcloud secrets versions access latest --project cloud-devrel-kokoro-resources --secret=client-library-test-universe-storage-location)
+
 cd $(dirname $0)/..
 
 # Run a pre-test hook, if a pre-system-test.sh is in the project