diff --git a/testing/web-platform/meta/native-file-system/__dir__.ini b/testing/web-platform/meta/native-file-system/__dir__.ini
new file mode 100644
index 000000000000..daf68383df9a
--- /dev/null
+++ b/testing/web-platform/meta/native-file-system/__dir__.ini
@@ -0,0 +1 @@
+leak-threshold: [default:51200]