diff --git a/modoboa/core/forms.py b/modoboa/core/forms.py
index a52bb8610..3c1d8e0de 100644
--- a/modoboa/core/forms.py
+++ b/modoboa/core/forms.py
@@ -49,7 +49,7 @@ class ProfileForm(forms.ModelForm):
         widget=forms.PasswordInput(attrs={"class": "form-control"})
     )
 
-    class Meta(object):
+    class Meta:
         model = User
         fields = ("first_name", "last_name", "language",
                   "phone_number", "secondary_email")
diff --git a/modoboa/core/tests/test_core.py b/modoboa/core/tests/test_core.py
index a0c6a36bf..c722432da 100644
--- a/modoboa/core/tests/test_core.py
+++ b/modoboa/core/tests/test_core.py
@@ -148,15 +148,26 @@ class ProfileTestCase(ModoTestCase):
 
         self.ajax_post(
             reverse("core:user_profile"),
-            {"oldpassword": "toto",
+            {"language": "en",
+             "oldpassword": "toto",
              "confirmation": "tutu"},
             status=400
         )
 
         self.ajax_post(
             reverse("core:user_profile"),
-            {"oldpassword": "toto",
-             "newpassword": "tutu", "confirmation": "tutu"},
+            {"language": "en",
+             "oldpassword": "toto",
+             "newpassword": "tutu"},
+            status=400
+        )
+
+        self.ajax_post(
+            reverse("core:user_profile"),
+            {"language": "en",
+             "oldpassword": "toto",
+             "newpassword": "tutu",
+             "confirmation": "tutu"},
             status=400
         )