diff --git a/lib/start.js b/lib/start.js
index 8c26b87e6d..df80cfb884 100644
--- a/lib/start.js
+++ b/lib/start.js
@@ -1,8 +1,7 @@
 'use strict';
 
 const detectPort = require('detect-port');
-const Application = require('./application');
-const Agent = require('./agent');
+const path = require('path');
 
 module.exports = async (options = {}) => {
   console.warn('single process mode is still in experiment, please don\'t use it in production environment');
@@ -11,6 +10,25 @@ module.exports = async (options = {}) => {
   options.mode = 'single';
   // FIXME: cluster-client support single process mode
   options.clusterPort = await detectPort();
+
+  // get agent from options.framework and package.egg.framework
+  if (!options.framework) {
+    try {
+      options.framework = require(path.join(options.baseDir, 'package.json')).egg.framework;
+    } catch (_) {
+      // ignore
+    }
+  }
+  let Agent;
+  let Application;
+  if (options.framework) {
+    Agent = require(options.framework).Agent;
+    Application = require(options.framework).Application;
+  } else {
+    Application = require('./application');
+    Agent = require('./agent');
+  }
+
   const agent = new Agent(Object.assign({}, options));
   await agent.ready();
   const application = new Application(Object.assign({}, options));
diff --git a/test/fixtures/apps/custom-framework-demo/app.js b/test/fixtures/apps/custom-framework-demo/app.js
new file mode 100644
index 0000000000..d0eece8635
--- /dev/null
+++ b/test/fixtures/apps/custom-framework-demo/app.js
@@ -0,0 +1,9 @@
+'use strict';
+
+module.exports = app => {
+  app.ready(() => {
+    app.config.tips = 'hello egg started';
+    // dynamic router
+    app.all('/all', app.controller.home);
+  });
+};
diff --git a/test/fixtures/apps/custom-framework-demo/app/controller/foo.js b/test/fixtures/apps/custom-framework-demo/app/controller/foo.js
new file mode 100644
index 0000000000..d6f9cd47a1
--- /dev/null
+++ b/test/fixtures/apps/custom-framework-demo/app/controller/foo.js
@@ -0,0 +1,9 @@
+'use strict';
+
+module.exports = app => {
+  return class Foo extends app.Controller {
+    * bar() {
+      this.ctx.body = 'this is bar!';
+    }
+  };
+};
diff --git a/test/fixtures/apps/custom-framework-demo/app/controller/hello.js b/test/fixtures/apps/custom-framework-demo/app/controller/hello.js
new file mode 100644
index 0000000000..1c9d1b71cb
--- /dev/null
+++ b/test/fixtures/apps/custom-framework-demo/app/controller/hello.js
@@ -0,0 +1,6 @@
+'use strict';
+
+module.exports = function*() {
+  this.cookies.set('hi', 'foo');
+  this.body = 'hello';
+};
diff --git a/test/fixtures/apps/custom-framework-demo/app/controller/home.js b/test/fixtures/apps/custom-framework-demo/app/controller/home.js
new file mode 100644
index 0000000000..fb335b81ac
--- /dev/null
+++ b/test/fixtures/apps/custom-framework-demo/app/controller/home.js
@@ -0,0 +1,5 @@
+module.exports = function* () {
+  this.body = {
+    workerTitle: process.title
+  };
+};
diff --git a/test/fixtures/apps/custom-framework-demo/app/controller/ip.js b/test/fixtures/apps/custom-framework-demo/app/controller/ip.js
new file mode 100644
index 0000000000..8b3fe6df6d
--- /dev/null
+++ b/test/fixtures/apps/custom-framework-demo/app/controller/ip.js
@@ -0,0 +1,10 @@
+'use strict';
+
+module.exports = function* () {
+  if (this.query.set_ip) {
+    this.ip = this.query.set_ip;
+  }
+  this.body = {
+    ip: this.ip,
+  };
+};
diff --git a/test/fixtures/apps/custom-framework-demo/app/controller/logger.js b/test/fixtures/apps/custom-framework-demo/app/controller/logger.js
new file mode 100644
index 0000000000..d56ffddb83
--- /dev/null
+++ b/test/fixtures/apps/custom-framework-demo/app/controller/logger.js
@@ -0,0 +1,17 @@
+'use strict';
+
+module.exports = function*() {
+  const message = this.query.message;
+
+  this.logger.debug('debug %s', message);
+  this.logger.info('info %s', message);
+  this.logger.warn('warn %s', message);
+  this.logger.error(new Error('error ' + message));
+
+  this.coreLogger.debug('core debug %s', message);
+  this.coreLogger.info('core info %s', message);
+  this.coreLogger.warn('core warn %s', message);
+  this.coreLogger.error(new Error('core error ' + message));
+
+  this.body = 'logger';
+};
diff --git a/test/fixtures/apps/custom-framework-demo/app/controller/obj.js b/test/fixtures/apps/custom-framework-demo/app/controller/obj.js
new file mode 100644
index 0000000000..260b80c6e6
--- /dev/null
+++ b/test/fixtures/apps/custom-framework-demo/app/controller/obj.js
@@ -0,0 +1,19 @@
+'use strict';
+
+module.exports = app => {
+  return {
+    * bar() {
+      this.ctx.body = 'this is obj bar!';
+    },
+
+    * error() {
+      aaa;
+    },
+
+    subObj: {
+      * hello() {
+        this.ctx.body = 'this is subObj hello!';
+      },
+    },
+  };
+};
diff --git a/test/fixtures/apps/custom-framework-demo/app/controller/obj2.js b/test/fixtures/apps/custom-framework-demo/app/controller/obj2.js
new file mode 100644
index 0000000000..9817c45eee
--- /dev/null
+++ b/test/fixtures/apps/custom-framework-demo/app/controller/obj2.js
@@ -0,0 +1,19 @@
+'use strict';
+
+module.exports = {
+  * bar() {
+    this.ctx.body = 'this is obj bar!';
+  },
+
+  subObj: {
+    * hello() {
+      this.ctx.body = 'this is subObj hello!';
+    },
+
+    subSubObj: {
+      * hello() {
+        this.ctx.body = 'this is subSubObj hello!';
+      },
+    },
+  },
+};
diff --git a/test/fixtures/apps/custom-framework-demo/app/router.js b/test/fixtures/apps/custom-framework-demo/app/router.js
new file mode 100644
index 0000000000..80a81c057e
--- /dev/null
+++ b/test/fixtures/apps/custom-framework-demo/app/router.js
@@ -0,0 +1,23 @@
+module.exports = app => {
+  app.get('home', '/', 'home');
+  app.get('/hello', app.controller.hello);
+  app.get('/logger', app.controller.logger);
+  app.get('/protocol', function*() {
+    this.body = this.protocol;
+  });
+
+  app.get('/user.json', app.jsonp(), function*() {
+    this.body = { name: 'fengmk2' };
+  });
+  app.get('/ip', app.controller.ip);
+
+  app.get('/class-controller', 'foo.bar');
+
+  app.get('/obj-controller', 'obj.bar');
+  app.get('/obj-error', 'obj.error');
+  app.get('/subobj-controller', 'obj.subObj.hello');
+
+  app.get('/obj2-controller', app.controller.obj2.bar);
+  app.get('/subobj2-controller', app.controller.obj2.subObj.hello);
+  app.get('/subSubObj-hello', app.controller.obj2.subObj.subSubObj.hello);
+};
diff --git a/test/fixtures/apps/custom-framework-demo/config/config.default.js b/test/fixtures/apps/custom-framework-demo/config/config.default.js
new file mode 100644
index 0000000000..446cf4d7e6
--- /dev/null
+++ b/test/fixtures/apps/custom-framework-demo/config/config.default.js
@@ -0,0 +1,22 @@
+exports.keys = 'foo';
+exports.proxy = true;
+exports.buffer = Buffer.from('test');
+
+exports.pass = 'this is pass';
+exports.pwd = 'this is pwd';
+exports.password = 'this is password';
+exports.passwordNew = 'this is passwordNew';
+exports.mysql = {
+  passd: 'this is passd',
+  passwd: 'this is passwd',
+  secret: 'secret 123',
+  secretNumber: 123,
+  secretBoolean: true,
+  masterKey: 'this is masterKey',
+  accessKey: 'this is accessKey',
+  accessId: 'this is accessId',
+  consumerSecret: 'this is consumerSecret',
+  someSecret: null,
+};
+
+exports.tips = 'hello egg';
diff --git a/test/fixtures/apps/custom-framework-demo/index.js b/test/fixtures/apps/custom-framework-demo/index.js
new file mode 100644
index 0000000000..472f1895cf
--- /dev/null
+++ b/test/fixtures/apps/custom-framework-demo/index.js
@@ -0,0 +1,6 @@
+const egg = require('../../../../');
+
+egg.start().then(app => {
+  app.listen(3000);
+  console.log('listen 3000');
+});
diff --git a/test/fixtures/apps/custom-framework-demo/package.json b/test/fixtures/apps/custom-framework-demo/package.json
new file mode 100644
index 0000000000..f44b4b1990
--- /dev/null
+++ b/test/fixtures/apps/custom-framework-demo/package.json
@@ -0,0 +1,6 @@
+{
+  "name": "custom-framework-demo",
+  "egg": {
+    "framework": "../test/fixtures/custom-egg"
+  }
+}
diff --git a/test/fixtures/custom-egg/index.js b/test/fixtures/custom-egg/index.js
index 8f3703b506..0a9055c252 100644
--- a/test/fixtures/custom-egg/index.js
+++ b/test/fixtures/custom-egg/index.js
@@ -1,3 +1,13 @@
 'use strict';
 
 module.exports = require('../../../index');
+module.exports.Application = class Application extends module.exports.Application {
+  constructor(...args) {
+    super(...args);
+    this.customEgg = true;
+  }
+
+  get [Symbol.for('egg#eggPath')]() {
+    return __dirname;
+  }
+};
diff --git a/test/lib/start.test.js b/test/lib/start.test.js
index e6a5340c0d..fc475ec546 100644
--- a/test/lib/start.test.js
+++ b/test/lib/start.test.js
@@ -4,16 +4,15 @@ const utils = require('../utils');
 const assert = require('assert');
 const path = require('path');
 
+let app;
+
 describe('test/lib/start.test.js', () => {
+  afterEach(() => app.close());
+
   describe('start', () => {
-    const baseDir = utils.getFilepath('apps/demo');
-    let app;
-    before(async () => {
+    it('should dump config and plugins', async () => {
       app = await utils.singleProcessApp('apps/demo');
-    });
-    after(() => app.close());
-
-    it('should dump config and plugins', () => {
+      const baseDir = utils.getFilepath('apps/demo');
       let json = require(path.join(baseDir, 'run/agent_config.json'));
       assert(/\d+\.\d+\.\d+/.test(json.plugins.onerror.version));
       assert(json.config.name === 'demo');
@@ -33,6 +32,40 @@ describe('test/lib/start.test.js', () => {
     });
 
     it('should request work', async () => {
+      app = await utils.singleProcessApp('apps/demo');
+      await app.httpRequest().get('/protocol')
+        .expect(200)
+        .expect('http');
+
+      await app.httpRequest().get('/class-controller')
+        .expect(200)
+        .expect('this is bar!');
+    });
+
+    it('should env work', async () => {
+      app = await utils.singleProcessApp('apps/demo', { env: 'prod' });
+      assert(app.config.env === 'prod');
+    });
+  });
+
+  describe('custom framework work', () => {
+    it('should work with options.framework', async () => {
+      app = await utils.singleProcessApp('apps/demo', { framework: path.join(__dirname, '../fixtures/custom-egg') });
+      assert(app.customEgg);
+
+      await app.httpRequest().get('/protocol')
+        .expect(200)
+        .expect('http');
+
+      await app.httpRequest().get('/class-controller')
+        .expect(200)
+        .expect('this is bar!');
+    });
+
+    it('should work with package.egg.framework', async () => {
+      app = await utils.singleProcessApp('apps/custom-framework-demo');
+      assert(app.customEgg);
+
       await app.httpRequest().get('/protocol')
         .expect(200)
         .expect('http');