diff --git a/gulpfile.js b/gulpfile.js
index 678fda527..6cf75e3fc 100644
--- a/gulpfile.js
+++ b/gulpfile.js
@@ -83,6 +83,8 @@ async function backTestOnce(done) {
         port: container.dbConf.port
     });
 
+    log('[Debug] dataSources', dataSources.vn);
+
     let bootOptions = {dataSources};
 
     let app = require(`./loopback/server/server`);
@@ -90,6 +92,8 @@ async function backTestOnce(done) {
     try {
         app.boot(bootOptions);
 
+        log('[Debug] back started');
+
         await new Promise((resolve, reject) => {
             const jasmine = require('gulp-jasmine');