diff --git a/billplz/billplz-tests.ts b/billplz/billplz-tests.ts
deleted file mode 100644
index 4f0e4633a2..0000000000
--- a/billplz/billplz-tests.ts
+++ /dev/null
@@ -1,46 +0,0 @@
-/// <reference path="billplz.d.ts" />
-
-import * as Billplz from 'billplz';
-
-const billplz = new Billplz({
-  key: 'your-api-key',
-  endpoint: 'http://localhost/',
-  sandbox: true
-});
-
-// test create collection
-billplz.create_collection({
-  title: 'your-title'
-});
-
-// test create open collection
-billplz.create_collectionOpen({
-  title: 'your-title',
-  description: 'your-description',
-  amount: 100
-});
-
-// test create bill
-billplz.create_bill({
-  collection_id: 'your-collection-id',
-  description: 'your-description',
-  email: 'your-email',
-  mobile: 12345,
-  name: 'your-name',
-  amount: 100,
-  callback_url: 'https://example.com/webhook/',
-  redirect_url: 'https://example.com/done',
-  due_at: '0000-00-00'
-});
-
-// test get bill
-billplz.get_bill('your-bill-id');
-
-// test delete bill
-billplz.delete_bill('your-bill-id');
-
-// test change collection status
-billplz.change_collection_status('your-collection-id', 'status-here');
-
-// test registration check
-billplz.registration_check('your-bank-account-number');
diff --git a/billplz/billplz.d.ts b/billplz/billplz.d.ts
deleted file mode 100644
index 53355f280b..0000000000
--- a/billplz/billplz.d.ts
+++ /dev/null
@@ -1,80 +0,0 @@
-// Type definitions for billplz 1.0.2
-// Project: https://github.com/suhz/node-billplz
-// Definitions by: Akim <https://github.com/Akim95>
-// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
-
-declare module Billplz {
-    // api options type
-    interface BillplzOptions {
-        key: string;
-        endpoint?: string;
-        sandbox?: boolean;
-    }
-
-    // collection type
-    interface CollectionArguments {
-        title: string;
-    }
-
-    // open collection type
-    interface OpenCollectionArguments {
-        title: string;
-        description: string;
-        amount: number;
-        fixed_amount?: boolean;
-        fixed_quantity?: boolean;
-        payment_button?: string;
-        reference_1_label?: string
-        reference_2_label?: string;
-        email_link?: string;
-        tax?: number;
-    }
-
-    // bill type
-    interface BillArguments {
-        collection_id: string;
-        email: string;
-        mobile: number;
-        name: string;
-        amount: number;
-        callback_url: string;
-        description: string;
-        due_at?: string;
-        redirect_url?: string;
-        deliver?: boolean;
-        reference_1_label?: string;
-        reference_1?: string;
-        reference_2_label?: string;
-        reference_2?: string;
-    }
-}
-
-declare class Billplz {
-    // constructor
-    constructor(options: string | Billplz.BillplzOptions);
-
-    // create_collection
-    create_collection(title: Billplz.CollectionArguments, callback?: (res: any, err: any) => void): void;
-
-    // create collectionOpen
-    create_collectionOpen(args: Billplz.OpenCollectionArguments, callback?: (res: any, err: any) => void): void;
-
-    // create bill
-    create_bill(args: Billplz.BillArguments, callback?: (res: any, err: any) => void): void;
-
-    // get bill
-    get_bill(billId: string, callback?: (res: any, err: any) => void): void;
-
-    // delete bill
-    delete_bill(billId: string, callback?: (res: any, err: any) => void): void;
-
-    // change_collection status
-    change_collection_status(collectionId: string, status: string, callback?: (res: any, err: any) => void): void;
-
-    // registration check
-    registration_check(bankAccountNumber: string, callback?: (res: any, err: any) => void): void;
-}
-
-declare module "billplz" {
-    export = Billplz;
-}