diff --git a/src/actions/data.js b/src/actions/data.js
index c824fbc6..5ead20f5 100644
--- a/src/actions/data.js
+++ b/src/actions/data.js
@@ -5,8 +5,8 @@ const fetchData = require('../utils/fetch-data');
 
 /**
  * File information
- * @param  {Object} params.fileId
- * @param  {Object} [params.fields]
+ * @param  {Object}   params.uploadId
+ * @param  {String[]} [params.fields]
  * @return {Promise}
  */
 async function getFileData({ params }) {
diff --git a/test/suites/data.js b/test/suites/data.js
index 099bcbd4..dc8ba962 100644
--- a/test/suites/data.js
+++ b/test/suites/data.js
@@ -50,7 +50,7 @@ describe('data suite', () => {
     });
   });
 
-  it('400 on if one of the fields length exceeds 50 chars', async () => {
+  it('400 when any of the requested fields are not strings', async () => {
     const req = this.send(route, {
       uploadId: this.response.uploadId,
       fields: [