diff --git a/tests/xapian_settings.py b/tests/xapian_settings.py
index 8508b2e..516106a 100755
--- a/tests/xapian_settings.py
+++ b/tests/xapian_settings.py
@@ -2,6 +2,7 @@ import os
 from .settings import *
 
 INSTALLED_APPS = [
+    'django.contrib.contenttypes',
     'test_haystack.core',
     'test_haystack.xapian_tests',
 ]
diff --git a/tests/xapian_tests/models.py b/tests/xapian_tests/models.py
index 3757eae..496c6b4 100644
--- a/tests/xapian_tests/models.py
+++ b/tests/xapian_tests/models.py
@@ -1,4 +1,5 @@
 from django.db import models
+from django.contrib.contenttypes.models import ContentType
 
 from ..core.models import MockTag, AnotherMockModel, MockModel, AFourthMockModel
 
@@ -34,3 +35,7 @@ class BlogEntry(models.Model):
     number = models.IntegerField()
     float_number = models.FloatField()
     decimal_number = models.DecimalField(max_digits=4, decimal_places=2)
+
+
+class DjangoContentType(models.Model):
+    content_type = models.ForeignKey(ContentType, on_delete=models.CASCADE)
diff --git a/tests/xapian_tests/search_indexes.py b/tests/xapian_tests/search_indexes.py
index 9d1c023..a588290 100644
--- a/tests/xapian_tests/search_indexes.py
+++ b/tests/xapian_tests/search_indexes.py
@@ -122,6 +122,13 @@ class XapianEdgeNGramIndex(indexes.SearchIndex):
         return models.BlogEntry
 
 
+class DjangoContentTypeIndex(indexes.SearchIndex):
+    text = indexes.CharField(document=True)
+
+    def get_model(self):
+        return models.DjangoContentType
+
+
 class MockSearchIndex(indexes.SearchIndex):
     text = indexes.CharField(document=True, use_template=True)
     name = indexes.CharField(model_attr='author', faceted=True)
diff --git a/tests/xapian_tests/tests/test_backend.py b/tests/xapian_tests/tests/test_backend.py
index f3625f0..1f8f353 100644
--- a/tests/xapian_tests/tests/test_backend.py
+++ b/tests/xapian_tests/tests/test_backend.py
@@ -8,6 +8,7 @@ import subprocess
 import os
 
 from django.apps import apps
+from django.contrib.contenttypes.models import ContentType
 from django.test import TestCase
 from django.utils.encoding import force_text
 
@@ -17,8 +18,8 @@ from haystack.models import SearchResult
 from haystack.utils.loading import UnifiedIndex
 
 from ..search_indexes import XapianNGramIndex, XapianEdgeNGramIndex, \
-    CompleteBlogEntryIndex, BlogSearchIndex
-from ..models import BlogEntry, AnotherMockModel, MockTag
+    CompleteBlogEntryIndex, BlogSearchIndex, DjangoContentTypeIndex
+from ..models import BlogEntry, AnotherMockModel, MockTag, DjangoContentType
 
 
 XAPIAN_VERSION = [int(x) for x in xapian.__version__.split('.')]
@@ -772,3 +773,22 @@ class IndexationEdgeNGramTestCase(HaystackBackendTestCase, TestCase):
                 [1])
         self.assertEqual(pks(self.backend.search(xapian.Query('da1'))['results']),
                 [2])
+
+
+class IndexationDjangoContentTypeTestCase(HaystackBackendTestCase, TestCase):
+    def get_index(self):
+        return DjangoContentTypeIndex()
+
+    def setUp(self):
+        super(IndexationDjangoContentTypeTestCase, self).setUp()
+
+        entry1 = ContentType(model='DjangoContentType')
+        entry1.save()
+        entry2 = DjangoContentType(content_type=entry1)
+        entry2.save()
+
+        self.backend.update(self.index, [entry2])
+
+    def test_basic(self):
+        terms = get_terms(self.backend, '-a')
+        self.assertTrue('CONTENTTYPExapian_tests.djangocontenttype' in terms)
diff --git a/tests/xapian_tests/tests/test_query.py b/tests/xapian_tests/tests/test_query.py
index f64acdc..24d3e1e 100644
--- a/tests/xapian_tests/tests/test_query.py
+++ b/tests/xapian_tests/tests/test_query.py
@@ -244,6 +244,10 @@ class XapianSearchQueryTestCase(HaystackBackendTestCase, TestCase):
                                  '(XTITLE^ PHRASE 3 XTITLE2 PHRASE 3 XTITLE$) OR '
                                  '(XTITLE^ PHRASE 3 XTITLE3 PHRASE 3 XTITLE$)))')
 
+    def test_content_type(self):
+        self.sq.add_filter(SQ(django_ct='time'))
+        self.assertExpectedQuery(self.sq.build_query(), 'CONTENTTYPEtime')
+
 
 class SearchQueryTestCase(HaystackBackendTestCase, TestCase):
     """