diff --git a/frontend/src/utils/exam-correct/exam-correct.js b/frontend/src/utils/exam-correct/exam-correct.js
index c0f0c84f0..bdf3a253d 100644
--- a/frontend/src/utils/exam-correct/exam-correct.js
+++ b/frontend/src/utils/exam-correct/exam-correct.js
@@ -2,11 +2,11 @@ import { Utility } from '../../core/utility';
 import { StorageManager, LOCATION } from '../../lib/storage-manager/storage-manager';
 import { HttpClient } from '../../services/http-client/http-client';
 
-import './exam-correct.sass';
-
 import Cookies from 'js-cookie';
 import moment from 'moment';
 
+import './exam-correct.sass';
+
 
 const EXAM_CORRECT_URL_POST = 'correct';
 const EXAM_CORRECT_HEADERS = {
@@ -26,8 +26,6 @@ const EXAM_CORRECT_INPUT_BODY_ID = 'exam-correct__new';
 const EXAM_CORRECT_USER_ATTR = 'exam-correct--user-id';
 const EXAM_CORRECT_USER_DNAME_ATTR = 'exam-correct--user-dname';
 
-const INPUT_EMPTY_CLASS = 'input--invalid';
-
 const STATUS = {
   NONE: null,
   SUCCESS: 'success',
@@ -110,7 +108,6 @@ export class ExamCorrect {
   destroy() {
     this._sendBtn.removeEventListener('click', this._sendCorrectionHandler);
     this._userInput.removeEventListener('change', this._validateUserInput);
-    this._userInput.removeEventListener('input', this._removeInputEmptyClassHandler);
     // TODO destroy handlers on user input candidate elements
   }
 
@@ -169,8 +166,6 @@ export class ExamCorrect {
 
     // abort send if the user input is empty
     if (!user && !userId) {
-      this._userInput.classList.add(INPUT_EMPTY_CLASS);
-      this._userInput.addEventListener('input', this._removeInputEmptyClassHandler.bind(this), { once: true });
       return;
     }
 
@@ -343,14 +338,6 @@ export class ExamCorrect {
     }
   }
 
-  _removeInputEmptyClassHandler() {
-    if (this._userInput.value) {
-      this._userInput.classList.remove(INPUT_EMPTY_CLASS);
-    } else {
-      this._userInput.addEventListener('input', this._removeInputEmptyClassHandler, { once: true });
-    }
-  }
-
   // TODO better name
   _showUserList(row, users, results) {
     let userElem = row.cells.item(this._cIndices.get('user'));