diff --git a/python/mozbuild/mozbuild/action/test_archive.py b/python/mozbuild/mozbuild/action/test_archive.py
index 42faf631f8fa..bf6871e13702 100644
--- a/python/mozbuild/mozbuild/action/test_archive.py
+++ b/python/mozbuild/mozbuild/action/test_archive.py
@@ -57,6 +57,11 @@ ARCHIVE_FILES = {
             'base': 'testing',
             'pattern': 'firefox-ui/**',
         },
+        {
+            'source': buildconfig.topsrcdir,
+            'base': 'dom/media/test',
+            'pattern': 'external-media-tests/**',
+        },
         {
             'source': buildconfig.topsrcdir,
             'base': 'js/src',