diff --git a/src/routes/test/backups-test.js b/src/routes/test/backups-test.js
index af441e067..08981ed49 100644
--- a/src/routes/test/backups-test.js
+++ b/src/routes/test/backups-test.js
@@ -56,7 +56,7 @@ function setup(done) {
         },
 
         function createSettings(callback) {
-            settings.setBackupConfig({ provider: 'caas', token: 'BACKUP_TOKEN' }, callback);
+            settings.setBackupConfig({ provider: 'caas', token: 'BACKUP_TOKEN', bucket: 'Bucket', prefix: 'Prefix' }, callback);
         }
     ], done);
 }
@@ -146,4 +146,3 @@ describe('Backups API', function () {
         });
     });
 });
-
diff --git a/src/storage/caas.js b/src/storage/caas.js
index d26745338..647249dfc 100644
--- a/src/storage/caas.js
+++ b/src/storage/caas.js
@@ -63,6 +63,8 @@ function getSignedUploadUrl(backupConfig, filename, callback) {
     assert.strictEqual(typeof filename, 'string');
     assert.strictEqual(typeof callback, 'function');
 
+    if (!backupConfig.bucket || !backupConfig.prefix) return new Error('Invalid configuration'); // prevent error in s3
+
     getBackupCredentials(backupConfig, function (error, credentials) {
         if (error) return callback(error);
 
@@ -85,6 +87,8 @@ function getSignedDownloadUrl(backupConfig, filename, callback) {
     assert.strictEqual(typeof filename, 'string');
     assert.strictEqual(typeof callback, 'function');
 
+    if (!backupConfig.bucket || !backupConfig.prefix) return new Error('Invalid configuration'); // prevent error in s3
+
     getBackupCredentials(backupConfig, function (error, credentials) {
         if (error) return callback(error);
 
@@ -108,6 +112,8 @@ function copyObject(backupConfig, from, to, callback) {
     assert.strictEqual(typeof to, 'string');
     assert.strictEqual(typeof callback, 'function');
 
+    if (!backupConfig.bucket || !backupConfig.prefix) return new Error('Invalid configuration'); // prevent error in s3
+
     getBackupCredentials(backupConfig, function (error, credentials) {
         if (error) return callback(error);