diff --git a/test/lib/PackageOverrideFile.js b/test/lib/PackageOverrideFile.js
index 8235418..0d65489 100644
--- a/test/lib/PackageOverrideFile.js
+++ b/test/lib/PackageOverrideFile.js
@@ -21,9 +21,11 @@ var ALLOWED_PROPERTIES = [
 	'files',
 	'ignore',
 	'shim',
-
 	'jspmNodeConversion',
-	'browser'
+	'browser',
+	'meta',
+	'systemjs',
+	'defaultExtension'
 ];
 
 /**