diff --git a/tests/api/test_all.py b/tests/api/test_all.py
index 9451c08b4..7247af4fc 100644
--- a/tests/api/test_all.py
+++ b/tests/api/test_all.py
@@ -125,33 +125,6 @@ def test_tracking_code(pub, auth, admin_user):
     resp = get_url('/api/code/%s' % code.id, status=404)
 
 
-def test_validate_expression(pub):
-    resp = get_app(pub).get('/api/validate-expression?expression=hello')
-    assert resp.json == {'klass': None, 'msg': ''}
-    resp = get_app(pub).get('/api/validate-expression?expression=[hello]')
-    assert resp.json == {'klass': None, 'msg': ''}
-    resp = get_app(pub).get('/api/validate-expression?expression==[hello')
-    assert resp.json['klass'] == 'error'
-    assert resp.json['msg'].startswith('syntax error')
-    resp = get_app(pub).get('/api/validate-expression?expression==[hello]')
-    assert resp.json['klass'] == 'warning'
-    assert resp.json['msg'].startswith('Make sure you want a Python expression,')
-    resp = get_app(pub).get('/api/validate-expression?expression==hello[0]')
-    assert resp.json == {'klass': None, 'msg': ''}
-    resp = get_app(pub).get('/api/validate-expression?expression==hello[\'plop\']')
-    assert resp.json == {'klass': None, 'msg': ''}
-    # django with unicode
-    resp = get_app(pub).get('/api/validate-expression?expression={{hello+%C3%A9l%C3%A9phant}}')
-    assert resp.json['klass'] == 'error'
-    assert resp.json['msg'].startswith('syntax error in Django template: Could not parse the remainder')
-    # broken ezt
-    resp = get_app(pub).get('/api/validate-expression?expression=[for]')
-    assert resp.json == {
-        'klass': 'error',
-        'msg': 'syntax error in ezt template: wrong number of arguments at line 1 and column 1',
-    }
-
-
 def test_validate_condition(pub):
     resp = get_app(pub).get('/api/validate-condition?type=python&value_python=hello')
     assert resp.json == {'klass': None, 'msg': ''}
diff --git a/wcs/api.py b/wcs/api.py
index 1c2f3b8ac..3fb5e0256 100644
--- a/wcs/api.py
+++ b/wcs/api.py
@@ -18,7 +18,6 @@ import base64
 import copy
 import datetime
 import json
-import re
 import time
 import urllib.parse
 
@@ -64,7 +63,6 @@ from .backoffice.management import ManagementDirectory
 from .backoffice.submission import SubmissionDirectory
 from .qommon import _, misc
 from .qommon.errors import AccessForbiddenError, TraversalError, UnknownNameIdAccessForbiddenError
-from .qommon.form import ComputedExpressionWidget
 from .qommon.template import Template, TemplateError
 
 
@@ -1464,21 +1462,6 @@ def geocoding(request, *args, **kwargs):
     return HttpResponse(misc.urlopen(url).read(), content_type='application/json')
 
 
-def validate_expression(request, *args, **kwargs):
-    expression = request.GET.get('expression')
-    hint = {'klass': None, 'msg': ''}
-    try:
-        ComputedExpressionWidget.validate(expression)
-    except ValidationError as e:
-        hint['klass'] = 'error'
-        hint['msg'] = str(e)
-    else:
-        if expression and re.match(r'^=.*\[[a-zA-Z_]\w*\]', expression):
-            hint['klass'] = 'warning'
-            hint['msg'] = _('Make sure you want a Python expression, not a simple template string.')
-    return JsonResponse(hint)
-
-
 def validate_condition(request, *args, **kwargs):
     condition = {}
     condition['type'] = request.GET.get('type') or ''
diff --git a/wcs/qommon/static/js/qommon.admin.js b/wcs/qommon/static/js/qommon.admin.js
index 457e17560..baee96be3 100644
--- a/wcs/qommon/static/js/qommon.admin.js
+++ b/wcs/qommon/static/js/qommon.admin.js
@@ -127,30 +127,6 @@ $(function() {
         });
     });
 
-    /* hints on the computed expression widget */
-    var validation_timeout_id = 0;
-    $('input[data-validation-url]').on('change focus input', function() {
-      var val = $(this).val();
-      var $widget = $(this).parents('.ComputedExpressionWidget');
-      var validation_url = $(this).data('validation-url');
-      clearTimeout(validation_timeout_id);
-      validation_timeout_id = setTimeout(function() {
-        $.ajax({
-          url: validation_url,
-          data: {expression: val},
-          dataType: 'json',
-          success: function(data) {
-            $widget.removeClass('hint-warning');
-            $widget.removeClass('hint-error');
-            if (data.klass) {
-              $widget.addClass('hint-' + data.klass);
-            }
-            $widget.prop('title', data.msg);
-          }
-        })}, 250);
-      return false;
-    });
-
     $('div[data-validation-url]').each(function(idx, elem) {
       var $widget = $(this);
       var widget_name = $widget.find('input').attr('name');
diff --git a/wcs/urls.py b/wcs/urls.py
index 34d3ebc8c..1726c7328 100644
--- a/wcs/urls.py
+++ b/wcs/urls.py
@@ -50,7 +50,6 @@ urlpatterns = [
         name='api-export-import-object-redirect',
     ),
     path('api/validate-condition', api.validate_condition, name='api-validate-condition'),
-    path('api/validate-expression', api.validate_expression, name='api-validate-expression'),
     path('api/reverse-geocoding', api.reverse_geocoding, name='api-reverse-geocoding'),
     path('api/geocoding', api.geocoding, name='api-geocoding'),
     path('api/statistics/', statistics_views.IndexView.as_view()),