diff --git a/tools/runners/run-mongo.js b/tools/runners/run-mongo.js
index 9f888c858c..8f9798cf9b 100644
--- a/tools/runners/run-mongo.js
+++ b/tools/runners/run-mongo.js
@@ -543,7 +543,7 @@ var launchMongo = function (options) {
         maybeReadyToTalk();
       }
 
-      if (/ \[rsSync\] transition to primary complete/.test(data)) {
+      if (/ \[rsSync-0\] transition to primary complete/.test(data)) {
         replSetReady = true;
         maybeReadyToTalk();
       }