diff --git a/colab/accounts/forms.py b/colab/accounts/forms.py
index 418a67f..0310863 100644
--- a/colab/accounts/forms.py
+++ b/colab/accounts/forms.py
@@ -12,8 +12,6 @@ from django.utils.encoding import force_bytes
 from django.utils.http import urlsafe_base64_encode
 from django.utils.text import capfirst
 from django.utils.translation import ugettext_lazy as _
-from django.core.validators import validate_email
-from django.core.exceptions import ValidationError
 from django.utils.safestring import mark_safe
 
 from conversejs.models import XMPPAccount
@@ -66,10 +64,12 @@ class UserForm(forms.ModelForm):
         email = self.cleaned_data.get('email')
         username = self.cleaned_data.get('username')
 
-        if email and User.objects.filter(email=email).exclude(
-                                                    username=username).count():
-            raise forms.ValidationError(
-                        mark_safe("Try login in: <a href='login'>sign in<a/>"))
+        user_qs = User.objects.filter(email=email).exclude(username=username)
+
+        if email and user_qs.exists():
+            msg = mark_safe("Try login in: <a href='login'>sign in<a/>")
+            raise forms.ValidationError(msg)
+
         return email
 
     def clean_username(self):
diff --git a/colab/accounts/tests/test_forms.py b/colab/accounts/tests/test_forms.py
index 892b7d7..be6a323 100644
--- a/colab/accounts/tests/test_forms.py
+++ b/colab/accounts/tests/test_forms.py
@@ -2,12 +2,13 @@
 Test Form class.
 Objective: Test parameters, and behavior.
 """
+from re import search
+
+from django.test import TestCase
+
 from colab.accounts.forms import UserForm
 from colab.accounts.models import User
-from django.test import TestCase, Client
-from django import forms
-from django.core.exceptions import ValidationError
-from re import search
+
 
 class FormTest(TestCase):
 
@@ -24,12 +25,12 @@ class FormTest(TestCase):
         user.save()
 
     def create_form_data(self):
-        form_data = {'email': 'usertest@colab.com.br', 
-                    'first_name': 'colabName', 
-                    'last_name': 'secondName', 
-                    'username': 'colab',
-                    'password1': '123colab4',
-                    'password2': '123colab4'}
+        form_data = {'email': 'usertest@colab.com.br',
+                     'first_name': 'colabName',
+                     'last_name': 'secondName',
+                     'username': 'colab',
+                     'password1': '123colab4',
+                     'password2': '123colab4'}
         form = UserForm(data=form_data)
         return form
 
--
libgit2 0.21.2