diff --git a/lib/app_handler.js b/lib/app_handler.js
index 96cb09b..7a7218f 100644
--- a/lib/app_handler.js
+++ b/lib/app_handler.js
@@ -1,4 +1,4 @@
-const debug = require('util').debuglog('egg-mock:bootstrap');
+const debug = require('util').debuglog('egg-mock:bootstrap:app_handler');
 const mockParallelApp = require('./parallel/app');
 const { setupAgent } = require('./agent_handler');
 const mock = require('../index').default;
@@ -8,10 +8,10 @@ let app;
 
 exports.setupApp = () => {
   if (app) {
+    debug('return exists app');
     return app;
   }
 
-
   const options = getEggOptions();
   debug('env.ENABLE_MOCHA_PARALLEL: %s, process.env.AUTO_AGENT: %s',
     process.env.ENABLE_MOCHA_PARALLEL, process.env.AUTO_AGENT);
@@ -47,6 +47,9 @@ exports.getApp = async suite => {
   if (getAppCallback) {
     return getAppCallback(suite);
   }
+  if (app) {
+    await app.ready();
+  }
   return app;
 };
 
diff --git a/lib/inject_context.js b/lib/inject_context.js
index 45e8686..2972bb5 100644
--- a/lib/inject_context.js
+++ b/lib/inject_context.js
@@ -18,8 +18,9 @@ function injectContext(mocha) {
 
   // Inject ctx for before/after.
   Runner.prototype.runSuite = async function(suite, fn) {
-    debug('run suite: %s %b', suite.title, !!(suite.ctx && suite[EGG_CONTEXT]));
+    debug('run suite: %j %s', suite.title, !!(suite.ctx && suite[EGG_CONTEXT]));
     const app = await appHandler.getApp(suite);
+    debug('get app: %s', !!app);
     const self = this;
     if (!app) {
       return runSuite.call(self, suite, fn);
@@ -47,6 +48,7 @@ function injectContext(mocha) {
   // Inject ctx for beforeEach/it/afterEach.
   // And ctx with before/after is not same as beforeEach/it/afterEach.
   Runner.prototype.runTests = async function(suite, fn) {
+    debug('run tests: %j %s', suite.title);
     const app = await appHandler.getApp(suite);
     const self = this;
     if (!app) {
diff --git a/lib/parallel/agent.js b/lib/parallel/agent.js
index 8c2eafb..4b9a069 100644
--- a/lib/parallel/agent.js
+++ b/lib/parallel/agent.js
@@ -58,7 +58,6 @@ class MockAgent extends Base {
     this[APP_INIT] = true;
     debug('this[APP_INIT] = true');
     this[BIND_EVENT]();
-    debug('http server instantiate');
     await agent.ready();
 
     const msg = {