Skip DeconstructTestCase with Django < 1.7

tests/tests.py

 from __future__ import unicode_literals, absolute_import
 
 from unittest import TestCase as UnitTestCase
+from unittest import skipIf
 
 import django
 from django.conf import settings
@@ -540,6 +541,7 @@ class TagStringParseTestCase(UnitTestCase):
         self.assertEqual(edit_string_for_tags([comma, spaces]), '"com,ma", "spa ces"')
 
 
+@skipIf(django.VERSION < (1, 7), "not relevant for Django < 1.7")
 class DeconstructTestCase(UnitTestCase):
     def test_deconstruct_kwargs_kept(self):
         instance = TaggableManager(through=OfficialThroughModel)