diff --git a/test_server/server.py b/test_server/server.py
index 823da96..6cb8cce 100644
--- a/test_server/server.py
+++ b/test_server/server.py
@@ -6,7 +6,11 @@
 import time
 import types
 from six.moves.urllib.parse import urljoin
-from collections import defaultdict, Iterable
+from collections import defaultdict
+try:
+    from collections.abc import Iterable
+except ImportError:
+    from collections import Iterable
 
 import six
 from webtest.http import StopableWSGIServer