diff --git a/mongoengine/queryset/base.py b/mongoengine/queryset/base.py
index bba63da0..647eafc6 100644
--- a/mongoengine/queryset/base.py
+++ b/mongoengine/queryset/base.py
@@ -363,6 +363,11 @@ class BaseQuerySet(object):
         except pymongo.errors.DuplicateKeyError as err:
             message = 'Could not save document (%s)'
             raise NotUniqueError(message % six.text_type(err))
+        except pymongo.errors.BulkWriteError as err:
+            # inserting documents that already have an _id field will
+            # give huge performance debt or raise
+            message = u'Document must not have _id value before bulk write (%s)'
+            raise NotUniqueError(message % six.text_type(err))
         except pymongo.errors.OperationFailure as err:
             message = 'Could not save document (%s)'
             if re.match('^E1100[01] duplicate key', six.text_type(err)):
@@ -371,11 +376,6 @@ class BaseQuerySet(object):
                 message = u'Tried to save duplicate unique keys (%s)'
                 raise NotUniqueError(message % six.text_type(err))
             raise OperationError(message % six.text_type(err))
-        except pymongo.errors.BulkWriteError as err:
-            # inserting documents that already have an _id field will
-            # give huge performance debt or raise
-            message = u'Document must not have _id value before bulk write (%s)'
-            raise NotUniqueError(message % six.text_type(err))
 
         if not load_bulk:
             signals.post_bulk_insert.send(