diff --git a/apps/iiif/kollections/models.py b/apps/iiif/kollections/models.py
index af9da0e8..77ca5e8c 100644
--- a/apps/iiif/kollections/models.py
+++ b/apps/iiif/kollections/models.py
@@ -67,7 +67,7 @@ def autocomplete_label(self):
         return self.label
 
     def __str__(self):
-        return self.label
+        return str(self.label)
 
     def get_absolute_url(self):
         """Concatenated property for collection's URI"""
@@ -95,7 +95,8 @@ def __make_thumbnail(self):
         size = (400, 500)
         image = Image.open(self.thumbnail)
 
-        # We need to test that this if else works correctly so that new files can be uploaded and existing files are not renamed.
+        # We need to test that this if else works correctly so that new files can be
+        # uploaded and existing files are not renamed.
         if 'thumbnails/' in self.thumbnail.name:
             return True
         else:
@@ -138,6 +139,7 @@ def __make_thumbnail(self):
             temp_thumb.seek(0)
 
             # set save=False, otherwise it will run in an infinite loop
+            # pylint: disable = no-member
             self.thumbnail.save(thumb_filename, ContentFile(temp_thumb.read()), save=False)
             temp_thumb.close()
             return True
@@ -211,6 +213,7 @@ def __make_header(self):
             temp_header.seek(0)
 
             # set save=False, otherwise it will run in an infinite loop
+            # pylint: disable = no-member
             self.header.save(thefilename, ContentFile(temp_header.read()), save=False)
             temp_header.close()
 
diff --git a/apps/iiif/manifests/tests/test_documents.py b/apps/iiif/manifests/tests/test_documents.py
index 7be4f88e..02b5d79c 100644
--- a/apps/iiif/manifests/tests/test_documents.py
+++ b/apps/iiif/manifests/tests/test_documents.py
@@ -104,13 +104,14 @@ def test_get_queryset(self):
         assert prefetched['collections'].count() == 1
         assert prefetched['collections'].first().pk == collection.pk
 
-    def test_get_instances_from_related(self):
-        """Should get manifests from related collections"""
-        manifest = ManifestFactory.create()
-        # connect a collection and manifest
-        collection = Collection(label="test collection")
-        collection.save()
-        manifest.collections.add(collection)
-        instances = self.doc.get_instances_from_related(related_instance=collection)
-        # should get the manifest related to this collection
-        self.assertQuerysetEqual(instances, [manifest])
+    # Removed test because we don't want to trigger a re-index when a collection is saved.
+    # def test_get_instances_from_related(self):
+    #     """Should get manifests from related collections"""
+    #     manifest = ManifestFactory.create()
+    #     # connect a collection and manifest
+    #     collection = Collection(label="test collection")
+    #     collection.save()
+    #     manifest.collections.add(collection)
+    #     instances = self.doc.get_instances_from_related(related_instance=collection)
+    #     # should get the manifest related to this collection
+    #     self.assertQuerysetEqual(instances, [manifest])