diff --git a/python/mach/mach/main.py b/python/mach/mach/main.py
index 6de9f92881e..83f01128513 100644
--- a/python/mach/mach/main.py
+++ b/python/mach/mach/main.py
@@ -16,7 +16,7 @@ import os
 import sys
 import traceback
 import uuid
-from collections import Iterable
+from collections.abc import Iterable
 
 from six import string_types
 
diff --git a/servo-tidy.toml b/servo-tidy.toml
index 0ef6ec937b5..9127ed67112 100644
--- a/servo-tidy.toml
+++ b/servo-tidy.toml
@@ -144,6 +144,7 @@ directories = [
   "./components/script/dom/bindings/codegen/parser",
   "./components/script/dom/bindings/codegen/ply",
   "./python/_virtualenv*",
+  "./python/mach",
   "./components/hashglobe/src",
   # Generated and upstream code combined with our own. Could use cleanup
   "./target",