diff --git a/.github/.OwlBot.lock.yaml b/.github/.OwlBot.lock.yaml
index 6c41b30..788f7a9 100644
--- a/.github/.OwlBot.lock.yaml
+++ b/.github/.OwlBot.lock.yaml
@@ -13,4 +13,4 @@
 # limitations under the License.
 docker:
   image: gcr.io/cloud-devrel-public-resources/owlbot-nodejs:latest
-  digest: sha256:f59941869d508c6825deeffce180579545fd528f359f549a80a18ec0458d7094
+  digest: sha256:fe04ae044dadf5ad88d979dbcc85e0e99372fb5d6316790341e6aca5e4e3fbc8
diff --git a/.kokoro/continuous/node12/system-test.cfg b/.kokoro/continuous/node12/system-test.cfg
index cdbad9a..24ea33e 100644
--- a/.kokoro/continuous/node12/system-test.cfg
+++ b/.kokoro/continuous/node12/system-test.cfg
@@ -5,3 +5,8 @@ env_vars: {
     key: "TRAMPOLINE_BUILD_FILE"
     value: "github/gcp-metadata/.kokoro/system-test.sh"
 }
+
+env_vars: {
+  key: "SECRET_MANAGER_KEYS"
+  value: "long-door-651-kokoro-system-test-service-account"
+}
\ No newline at end of file
diff --git a/.kokoro/presubmit/node12/system-test.cfg b/.kokoro/presubmit/node12/system-test.cfg
index cdbad9a..24ea33e 100644
--- a/.kokoro/presubmit/node12/system-test.cfg
+++ b/.kokoro/presubmit/node12/system-test.cfg
@@ -5,3 +5,8 @@ env_vars: {
     key: "TRAMPOLINE_BUILD_FILE"
     value: "github/gcp-metadata/.kokoro/system-test.sh"
 }
+
+env_vars: {
+  key: "SECRET_MANAGER_KEYS"
+  value: "long-door-651-kokoro-system-test-service-account"
+}
\ No newline at end of file
diff --git a/.kokoro/system-test.sh b/.kokoro/system-test.sh
index 87fa065..0201e9d 100755
--- a/.kokoro/system-test.sh
+++ b/.kokoro/system-test.sh
@@ -19,7 +19,7 @@ set -eo pipefail
 export NPM_CONFIG_PREFIX=${HOME}/.npm-global
 
 # Setup service account credentials.
-export GOOGLE_APPLICATION_CREDENTIALS=${KOKORO_GFILE_DIR}/service-account.json
+export GOOGLE_APPLICATION_CREDENTIALS=${KOKORO_GFILE_DIR}/secret_manager/long-door-651-kokoro-system-test-service-account
 export GCLOUD_PROJECT=long-door-651
 
 cd $(dirname $0)/..