diff --git a/test/test-runfiles.js b/test/test-runfiles.js
index a66bcb0f5..b9ef754f2 100644
--- a/test/test-runfiles.js
+++ b/test/test-runfiles.js
@@ -111,7 +111,7 @@ exports.testEmptyDir = function (test) {
     // git doesn't like empty directories, so we have to create one
     path.exists(dir2, function (exists) {
         if (!exists) {
-            fs.mkdirSync(dir2, 777);
+            fs.mkdirSync(dir2, 0777);
         }
 
         // runFiles on empty directory: