              'Watch out! Letters, numbers, underscores and hyphens only.',
          )
  
      def test_error_messages_overrides(self):
          form = FieldOverridesTroughFormMetaForm(data={
              'name': 'Category',
              'url': '/category/',
              'slug': '!%#*@',
          })
          form.full_clean()
 
</s> remove         form = FieldOverridesTroughFormMetaForm()
 </s> add         form = FieldOverridesByFormMetaForm() </s> remove         form = FieldOverridesTroughFormMetaForm()
 </s> add         form = FieldOverridesByFormMetaForm() </s> remove         form = FieldOverridesTroughFormMetaForm()
 </s> add         form = FieldOverridesByFormMetaForm() </s> remove class FieldOverridesTroughFormMetaForm(forms.ModelForm):
 </s> add class FieldOverridesByFormMetaForm(forms.ModelForm): </s> remove class TestFieldOverridesTroughFormMeta(TestCase):
 </s> add class TestFieldOverridesByFormMeta(TestCase):
        form = FieldOverridesByFormMetaForm(data={
              'Watch out! Letters, numbers, underscores and hyphens only.',
          )
  
      def test_error_messages_overrides(self):
        form = FieldOverridesByFormMetaForm(data={
              'name': 'Category',
              'url': '/category/',
              'slug': '!%#*@',
          })
          form.full_clean()
keep keep keep keep replace keep keep keep keep keep
 Fixed spelling in model_forms test class names 
tests/model_forms/tests.py