diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 280252b..960f5a7 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -1,5 +1,5 @@
 ---
-on: [push, pull_request]
+on: [pull_request]
 
 name: Run tests
 jobs:
@@ -14,6 +14,8 @@ jobs:
           node-version: 12
       - run: yarn
         name: Install dependencies
+      - name: ESLint checks
+        run: yarn lint
       - run: yarn build
         name: Compile Typescript
       - run: yarn test
diff --git a/src/client/download.ts b/src/client/download.ts
index 5050025..cf15e59 100644
--- a/src/client/download.ts
+++ b/src/client/download.ts
@@ -87,11 +87,7 @@ export class FileDownloader {
     ) {
       return data;
     }
-    let newData = '';
-    for (let i = 0; i < data.length; i += 1) {
-      newData += this.bufferCharacter(data[i]);
-    }
-    return newData;
+    return data.split('').map(this.bufferCharacter.bind(this)).join('')
   }
 
   onCompleteFile(bufferCharacters: string) {