diff --git a/libcxx/utils/libcxx/test/executor.py b/libcxx/utils/libcxx/test/executor.py
--- a/libcxx/utils/libcxx/test/executor.py
+++ b/libcxx/utils/libcxx/test/executor.py
@@ -6,6 +6,7 @@
 #
 #===----------------------------------------------------------------------===##
 
+import platform
 import os
 
 from pathlib import PurePosixPath