diff --git a/test/api-test.js b/test/api-test.js
index d925e6ac..02130ff3 100644
--- a/test/api-test.js
+++ b/test/api-test.js
@@ -584,7 +584,7 @@ describe('API tests', function () {
             expect(messageData.attachments).to.deep.equal([
                 {
                     contentType: 'image/png',
-                    disposition: 'attachment',
+                    disposition: 'inline',
                     filename: 'attachment-1.png',
                     hash: '6bb932138c9062004611ca0170d773e78d79154923c5daaf6d8a2f27361c33a2',
                     id: 'ATT00001',