diff --git a/.eslintrc.js b/.eslintrc.js
index b300023..526ef78 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -21,6 +21,11 @@ module.exports = {
     'no-use-before-define': ['error', { functions: false }],
     '@typescript-eslint/no-use-before-define': ['error', { functions: false }],
     'import/prefer-default-export': 'off',
+    'lines-between-class-members': [
+      'error',
+      'always',
+      { exceptAfterSingleLine: true },
+    ],
     'import/extensions': [
       'error',
       'always',
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index a0d1be4..0c5d0fd 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -21,6 +21,8 @@ jobs:
         run: yarn lint
       - run: yarn build
         name: Compile Typescript
+      - run: yarn test
+        name: Run tests
       - name: Publish
         uses: mikeal/merge-release@master
         env:
diff --git a/package.json b/package.json
index be7d810..df58ff6 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "wetty",
-  "version": "1.2.2",
+  "version": "1.2.3",
   "description": "WeTTY = Web + TTY. Terminal access in browser over http/https",
   "homepage": "https://github.com/butlerx/wetty",
   "repository": {
diff --git a/src/client/download.ts b/src/client/download.ts
index cf15e59..7db2064 100644
--- a/src/client/download.ts
+++ b/src/client/download.ts
@@ -2,8 +2,14 @@ const DEFAULT_FILE_BEGIN = '\u001b[5i';
 const DEFAULT_FILE_END = '\u001b[4i';
 
 export class FileDownloader {
+  fileBuffer: string[];
+  fileBegin: string;
+  fileEnd: string;
+  partialFileBegin: string;
+  onCompleteFileCallback: Function;
+
   constructor(
-    onCompleteFileCallback: (file: string) => any,
+    onCompleteFileCallback: (file: string) => void,
     fileBegin: string = DEFAULT_FILE_BEGIN,
     fileEnd: string = DEFAULT_FILE_END
   ) {
@@ -87,10 +93,13 @@ export class FileDownloader {
     ) {
       return data;
     }
-    return data.split('').map(this.bufferCharacter.bind(this)).join('')
+    return data
+      .split('')
+      .map(this.bufferCharacter.bind(this))
+      .join('');
   }
 
-  onCompleteFile(bufferCharacters: string) {
+  onCompleteFile(bufferCharacters: string): void {
     this.onCompleteFileCallback(bufferCharacters);
   }
 }
diff --git a/src/client/index.ts b/src/client/index.ts
index eee0940..454f038 100644
--- a/src/client/index.ts
+++ b/src/client/index.ts
@@ -1,8 +1,8 @@
 import { Terminal } from 'xterm';
 import { isNull } from 'lodash';
 
-import { dom, library } from "@fortawesome/fontawesome-svg-core";
-import { faCogs } from "@fortawesome/free-solid-svg-icons/faCogs";
+import { dom, library } from '@fortawesome/fontawesome-svg-core';
+import { faCogs } from '@fortawesome/free-solid-svg-icons/faCogs';
 import Toastify from 'toastify-js';
 import * as fileType from 'file-type';
 import { socket } from './socket';
@@ -78,9 +78,7 @@ socket.on('connect', () => {
   term.focus();
   mobileKeyboard();
 
-  const fileDownloader = new FileDownloader(function (
-    bufferCharacters: string
-  ) {
+  const fileDownloader = new FileDownloader((bufferCharacters: string) => {
     let fileCharacters = bufferCharacters;
     // Try to decode it as base64, if it fails we assume it's not base64
     try {