diff --git a/components/script/dom/Test_mapping.json b/components/script/dom/Test_mapping.json
index fea1022609b..3a66bae87ac 100644
--- a/components/script/dom/Test_mapping.json
+++ b/components/script/dom/Test_mapping.json
@@ -1,8 +1,8 @@
-{
-  "xmlhttprequest.rs": [
-    "XMLHttpRequest"
-  ],
-  "range.rs": [
-    "dom/ranges"
-  ]
-}
+{
+  "xmlhttprequest.rs": [
+    "XMLHttpRequest"
+  ],
+  "range.rs": [
+    "dom/ranges"
+  ]
+}