diff --git a/functions/helloworld/index.js b/functions/helloworld/index.js
index e7dd86fff9..f28776148e 100644
--- a/functions/helloworld/index.js
+++ b/functions/helloworld/index.js
@@ -99,7 +99,7 @@ exports.helloGCS = function (event, callback) {
 
   if (file.resourceState === 'not_exists') {
     console.log(`File ${file.name} deleted.`);
-  } else if (file.metageneration === 1) {
+  } else if (file.metageneration === '1') {
     // metageneration attribute is updated on metadata changes.
     // on create value is 1
     console.log(`File ${file.name} uploaded.`);
diff --git a/functions/helloworld/test/index.test.js b/functions/helloworld/test/index.test.js
index 4812fb7928..66d0bf96ff 100644
--- a/functions/helloworld/test/index.test.js
+++ b/functions/helloworld/test/index.test.js
@@ -143,7 +143,7 @@ test.serial(`helloGCS: should print uploaded message`, (t) => {
     data: {
       name: `foo`,
       resourceState: `exists`,
-      metageneration: 1
+      metageneration: `1`
     }
   }, callback);
 
@@ -161,7 +161,7 @@ test.serial(`helloGCS: should print metadata updated message`, (t) => {
     data: {
       name: `foo`,
       resourceState: `exists`,
-      metageneration: 2
+      metageneration: `2`
     }
   }, callback);