diff --git a/media/webrtc/trunk/tools/gyp/pylib/gyp/common.py b/media/webrtc/trunk/tools/gyp/pylib/gyp/common.py
index b268d229a483..4f9cb0eca728 100644
--- a/media/webrtc/trunk/tools/gyp/pylib/gyp/common.py
+++ b/media/webrtc/trunk/tools/gyp/pylib/gyp/common.py
@@ -494,7 +494,7 @@ def uniquer(seq, idfun=None):
 
 
 # Based on http://code.activestate.com/recipes/576694/.
-class OrderedSet(collections.MutableSet):
+class OrderedSet(collections.abc.MutableSet):
   def __init__(self, iterable=None):
     self.end = end = []
     end += [None, end, end]         # sentinel node for doubly linked list
diff --git a/testing/mozbase/manifestparser/manifestparser/filters.py b/testing/mozbase/manifestparser/manifestparser/filters.py
index 3bc7c3a60541..cd5b8268358c 100644
--- a/testing/mozbase/manifestparser/manifestparser/filters.py
+++ b/testing/mozbase/manifestparser/manifestparser/filters.py
@@ -8,7 +8,8 @@ dictionary of values, and returns a new iterable of test objects. It is
 possible to define custom filters if the built-in ones are not enough.
 """
 
-from collections import defaultdict, MutableSequence
+from collections import defaultdict
+from collections.abc import MutableSequence
 import itertools
 import os