diff --git a/tests/xapian_tests/tests/xapian_backend.py b/tests/xapian_tests/tests/xapian_backend.py
index e21685e..457f14f 100644
--- a/tests/xapian_tests/tests/xapian_backend.py
+++ b/tests/xapian_tests/tests/xapian_backend.py
@@ -8,7 +8,6 @@ import xapian
 
 from django.conf import settings
 from django.db import models
-from django.utils.encoding import force_unicode
 from django.test import TestCase
 
 from haystack import indexes, sites
@@ -117,7 +116,6 @@ class XapianSearchBackendTestCase(TestCase):
     
     def test_update(self):
         self.sb.update(self.msi, self.sample_objs)
-        self.sb.update(self.msi, self.sample_objs) # Duplicates should be updated, not appended -- http://github.com/notanumber/xapian-haystack/issues/#issue/6
         
         self.assertEqual(len(self.xapian_search('')), 3)
         self.assertEqual([dict(doc) for doc in self.xapian_search('')], [
@@ -126,6 +124,12 @@ class XapianSearchBackendTestCase(TestCase):
             {'flag': u'true', 'name': u'david3', 'text': u'indexed!\n3', 'sites': u"['3', '6', '9']", 'pub_date': u'20090222000000', 'value': u'000000000015', 'id': u'tests.xapianmockmodel.3', 'slug': u'http://example.com/3', 'popularity': '\xcb\x98', 'django_id': u'3', 'django_ct': u'tests.xapianmockmodel'}
         ])
 
+    def test_duplicate_update(self):
+        self.sb.update(self.msi, self.sample_objs)
+        self.sb.update(self.msi, self.sample_objs) # Duplicates should be updated, not appended -- http://github.com/notanumber/xapian-haystack/issues/#issue/6
+        
+        self.assertEqual(len(self.xapian_search('')), 3)
+
     def test_remove(self):
         self.sb.update(self.msi, self.sample_objs)
         self.assertEqual(len(self.xapian_search('')), 3)
@@ -295,18 +299,7 @@ class XapianSearchBackendTestCase(TestCase):
     #     results = self.sb.more_like_this(self.sample_objs[0], additional_query_string='david3')
     #     self.assertEqual(results['hits'], 1)
     #     self.assertEqual([result.pk for result in results['results']], [3])
-    
-    # def test_document_count(self):
-    #     self.sb.update(self.msi, self.sample_objs)
-    #     self.assertEqual(self.sb.document_count(), 3)
-    
-    # def test_delete_index(self):
-    #     self.sb.update(self.msi, self.sample_objs)
-    #     self.assert_(self.sb.document_count() > 0)
-    #     
-    #     self.sb.delete_index()
-    #     self.assertRaises(InvalidIndexError, self.sb.document_count)
-    
+
     # def test_order_by(self):
     #     self.sb.update(self.msi, self.sample_objs)
     #     
diff --git a/xapian_backend.py b/xapian_backend.py
index 2e8243d..eb9acff 100755
--- a/xapian_backend.py
+++ b/xapian_backend.py
@@ -17,7 +17,7 @@ from django.core.exceptions import ImproperlyConfigured
 from django.utils.encoding import smart_unicode, force_unicode
 
 from haystack.backends import BaseSearchBackend, BaseSearchQuery, SearchNode, log_query
-from haystack.exceptions import MissingDependency, HaystackError
+from haystack.exceptions import MissingDependency
 from haystack.fields import DateField, DateTimeField, IntegerField, FloatField, BooleanField, MultiValueField
 from haystack.models import SearchResult
 from haystack.utils import get_identifier
@@ -309,15 +309,6 @@ class SearchBackend(BaseSearchBackend):
             'spelling_suggestion': spelling_suggestion,
         }
     
-    def delete_index(self):
-        """
-        Delete the index.
-        
-        This removes all indexes files and the `HAYSTACK_XAPIAN_PATH` folder.
-        """
-        if os.path.exists(settings.HAYSTACK_XAPIAN_PATH):
-            shutil.rmtree(settings.HAYSTACK_XAPIAN_PATH)
-    
     def more_like_this(self, model_instance, additional_query_string=None,
                        start_offset=0, end_offset=None, 
                        limit_to_registered_models=True, **kwargs):
@@ -613,7 +604,7 @@ class SearchBackend(BaseSearchBackend):
             database.set_metadata('content', pickle.dumps(self.content_field_name, pickle.HIGHEST_PROTOCOL))
         else:
             database = xapian.Database(settings.HAYSTACK_XAPIAN_PATH)
-            
+                
             self.schema = pickle.loads(database.get_metadata('schema'))
             self.content_field_name = pickle.loads(database.get_metadata('content'))