diff --git a/mongoengine/base/fields.py b/mongoengine/base/fields.py
index 6ebba36..3929a3a 100644
--- a/mongoengine/base/fields.py
+++ b/mongoengine/base/fields.py
@@ -295,7 +295,7 @@ class ComplexBaseField(BaseField):
                     meta = getattr(v, '_meta', {})
                     allow_inheritance = (
                         meta.get('allow_inheritance', ALLOW_INHERITANCE)
-                        == True)
+                        is True)
                     if not allow_inheritance and not self.field:
                         value_dict[k] = GenericReferenceField().to_mongo(v)
                     else:
diff --git a/mongoengine/document.py b/mongoengine/document.py
index c4542a2..bd6ce19 100644
--- a/mongoengine/document.py
+++ b/mongoengine/document.py
@@ -548,7 +548,7 @@ class Document(BaseDocument):
         # If _cls is being used (for polymorphism), it needs an index,
         # only if another index doesn't begin with _cls
         if (index_cls and not cls_indexed and
-            cls._meta.get('allow_inheritance', ALLOW_INHERITANCE) == True):
+           cls._meta.get('allow_inheritance', ALLOW_INHERITANCE) is True):
             collection.ensure_index('_cls', background=background,
                                     **index_opts)
 
diff --git a/mongoengine/queryset/queryset.py b/mongoengine/queryset/queryset.py
index 5c7c7c8..65d6553 100644
--- a/mongoengine/queryset/queryset.py
+++ b/mongoengine/queryset/queryset.py
@@ -66,7 +66,7 @@ class QuerySet(object):
 
         # If inheritance is allowed, only return instances and instances of
         # subclasses of the class being used
-        if document._meta.get('allow_inheritance') == True:
+        if document._meta.get('allow_inheritance') is True:
             self._initial_query = {"_cls": {"$in": self._document._subclasses}}
             self._loaded_fields = QueryFieldList(always_include=['_cls'])
         self._cursor_obj = None