diff --git a/rest_framework/fields.py b/rest_framework/fields.py
index 1b8387714..b5fafeaa3 100644
--- a/rest_framework/fields.py
+++ b/rest_framework/fields.py
@@ -1660,7 +1660,7 @@ class ListField(Field):
         """
         if html.is_html_input(data):
             data = html.parse_html_list(data, default=[])
-        if isinstance(data, type('')) or isinstance(data, Mapping) or not hasattr(data, '__iter__'):
+        if isinstance(data, (type(''), Mapping)) or not hasattr(data, '__iter__'):
             self.fail('not_a_list', input_type=type(data).__name__)
         if not self.allow_empty and len(data) == 0:
             self.fail('empty')