diff --git a/app_check/integration_test/functions/functions/index.js b/app_check/integration_test/functions/functions/index.js
index 4d1a3435e5..b1e93b977b 100644
--- a/app_check/integration_test/functions/functions/index.js
+++ b/app_check/integration_test/functions/functions/index.js
@@ -14,9 +14,9 @@
  * limitations under the License.
  */
 
-const functions = require('firebase-functions');
+const functions = require('firebase-functions/v1');
 const admin = require('firebase-admin');
-admin.initializeApp(functions.config().firebase);
+admin.initializeApp();
 
 // Adds two numbers to each other.
 exports.addNumbers = functions
diff --git a/messaging/integration_test/functions/functions/index.js b/messaging/integration_test/functions/functions/index.js
index 62e5a7ae8f..9fe34b399c 100644
--- a/messaging/integration_test/functions/functions/index.js
+++ b/messaging/integration_test/functions/functions/index.js
@@ -15,7 +15,7 @@
  */
 
 // Import the Firebase SDK for Google Cloud Functions.
-const functions = require('firebase-functions');
+const functions = require('firebase-functions/v1');
 // Import and initialize the Firebase Admin SDK.
 const admin = require('firebase-admin');
 admin.initializeApp();