diff --git a/dropboxjs/dropboxjs-tests.ts b/dropboxjs/dropboxjs-tests.ts
index efc6a3693..ad8e608a4 100644
--- a/dropboxjs/dropboxjs-tests.ts
+++ b/dropboxjs/dropboxjs-tests.ts
@@ -37,7 +37,7 @@ browserClient.authenticate((error:any, client:Dropbox.Client) => {
         alert(data);  // data has the file's contents
     });
 
-    client.readdir("/", (err: Dropbox.ApiError, filenames: string[], stat: Dropbox.File.Stat, folderEntries?: Dropbox.File.Stat[]) => {
+    client.readdir("/", (err: Dropbox.ApiError, filenames: string[], stat: Dropbox.File.Stat, folderEntries: Dropbox.File.Stat[]) => {
         if (error) {
             alert(error);  // Something went wrong.
         }
@@ -46,7 +46,7 @@ browserClient.authenticate((error:any, client:Dropbox.Client) => {
     });
 });
 
-var serverClient:Dropbox.Client = new Dropbox.Client({
+var serverClient = new Dropbox.Client({
     key: "your-key-here",
     secret: "your-secret-here"
 });
diff --git a/dropboxjs/dropboxjs.d.ts b/dropboxjs/dropboxjs.d.ts
index c40a69f4b..ab3dbe2ee 100644
--- a/dropboxjs/dropboxjs.d.ts
+++ b/dropboxjs/dropboxjs.d.ts
@@ -455,12 +455,12 @@ declare module Dropbox {
         resumableUploadStep(data: any, cursor: Http.UploadCursor, callback: ResumableUploadStepCallback): XMLHttpRequest;
         resumableUploadFinish(path: string, cursor: Http.UploadCursor, callback: ClientFileWriteCallback): XMLHttpRequest;
         resumableUploadFinish(path: string, cursor: Http.UploadCursor, options: ClientFileWriteOptions, callback: ClientFileWriteCallback): XMLHttpRequest;
-        stat(path: string, callback: (err: ApiError, stat: File.Stat, folderEntries?: File.Stat[]) => void): XMLHttpRequest;
-        stat(path: string, options: File.StatOptions, callback: (err: ApiError, stat: File.Stat, folderEntries?: File.Stat[]) => void): XMLHttpRequest;
-        readdir(path: string, callback: (err: ApiError, filenames: string[], stat: File.Stat, folderEntries?: File.Stat[]) => void): XMLHttpRequest;
-        readdir(path: string, options: ReadDirOptions, callback: (err: ApiError, filenames: string[], stat: File.Stat, folderEntries?: File.Stat[]) => void): XMLHttpRequest;
-        metadata(path: string, callback: (err: ApiError, stat: File.Stat, folderEntries?: File.Stat[]) => void): void;
-        metadata(path: string, options: File.StatOptions, callback: (err: ApiError, stat: File.Stat, folderEntries?: File.Stat[]) => void): void;
+        stat(path: string, callback: (err: ApiError, stat: File.Stat, folderEntries: File.Stat[]) => void): XMLHttpRequest;
+        stat(path: string, options: File.StatOptions, callback: (err: ApiError, stat: File.Stat, folderEntries: File.Stat[]) => void): XMLHttpRequest;
+        readdir(path: string, callback: (err: ApiError, filenames: string[], stat: File.Stat, folderEntries: File.Stat[]) => void): XMLHttpRequest;
+        readdir(path: string, options: ReadDirOptions, callback: (err: ApiError, filenames: string[], stat: File.Stat, folderEntries: File.Stat[]) => void): XMLHttpRequest;
+        metadata(path: string, callback: (err: ApiError, stat: File.Stat, folderEntries: File.Stat[]) => void): void;
+        metadata(path: string, options: File.StatOptions, callback: (err: ApiError, stat: File.Stat, folderEntries: File.Stat[]) => void): void;
         makeUrl(path: string, callback: (err: ApiError, shareUrl: File.ShareUrl) => void): XMLHttpRequest;
         makeUrl(path: string, options: MakeURLOptions, callback: (err: ApiError, shareUrl: File.ShareUrl) => void): XMLHttpRequest;
         history(path: string, callback: (err: ApiError, fileVersions: File.Stat[]) => void): XMLHttpRequest;