diff --git a/.autod.conf b/.autod.conf
index d5d0bbd3..1ca8ef14 100644
--- a/.autod.conf
+++ b/.autod.conf
@@ -13,9 +13,11 @@ module.exports = {
     'co-mocha',
     'intelli-espower-loader',
     'power-assert',
+    'espower-typescript',
     'ypkgfiles',
   ],
   devdep: [
+    'egg',
     'autod',
     'eslint-config-egg',
     'egg-ci',
diff --git a/.gitignore b/.gitignore
index 348042ed..f22ee7c5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,10 +1,18 @@
 node_modules/
 coverage/
-!test/fixtures/custom-framework-app/node_modules/
+test/fixtures/custom-framework-app/node_modules/
+
+test/fixtures/demo-app/node_modules/aliyun-egg/
 !test/fixtures/demo-app/node_modules/aliyun-egg/node_modules/
+
+test/fixtures/ts/node_modules/aliyun-egg/
+!test/fixtures/ts/node_modules/aliyun-egg/node_modules/
+
 !test/fixtures/test-files-glob/**
 !test/fixtures/test-files-stack/node_modules/
 !test/fixtures/example/node_modules/
+
+
 **/run/*.json
 .tmp
 .vscode
diff --git a/.travis.yml b/.travis.yml
index 47cc542e..7212f2a9 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,9 +3,19 @@ language: node_js
 node_js:
   - '6'
   - '8'
+env:
+  - EGG_VERSION=1
+  - EGG_VERSION=2
+matrix:
+  exclude:
+  - node_js: '6'
+    env: EGG_VERSION=2
 install:
-  - npm i npminstall && npminstall
+  - npm i npminstall
+  - sed -i.bak '/"egg":/d' package.json
+  - npminstall -d
 script:
+  - eval "npminstall -d egg@$EGG_VERSION"
   - npm run ci
 after_script:
   - npminstall codecov && codecov
diff --git a/README.md b/README.md
index 3e10ed6f..c7637d8d 100644
--- a/README.md
+++ b/README.md
@@ -80,6 +80,8 @@ $ egg-bin dev
 - `--port` server port, default to `7001`.
 - `--cluster` worker process number, skip this argvs will start only `1` worker, provide this without value will start `cpu` count worker.
 - `--sticky` start a sticky cluster server, default to `false`.
+- `--typescript` / `--ts` enable typescript support, default to `false`.
+- `--require` will add to `execArgv`, support multiple.
 
 ### debug
 
@@ -130,6 +132,7 @@ You can pass any mocha argv.
 - `--grep` only run tests matching <pattern>
 - `--timeout` milliseconds, default to 30000
 - `--full-trace` display the full stack trace, default to false.
+- `--typescript` / `--ts` enable typescript support, default to `false`.
 - see more at https://mochajs.org/#usage
 
 #### environment
diff --git a/appveyor.yml b/appveyor.yml
index 3d15e523..c274b7d3 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,6 +1,5 @@
 environment:
   matrix:
-    - nodejs_version: '6'
     - nodejs_version: '8'
 
 install:
diff --git a/lib/cmd/dev.js b/lib/cmd/dev.js
index a187ee26..3ae25083 100644
--- a/lib/cmd/dev.js
+++ b/lib/cmd/dev.js
@@ -33,6 +33,11 @@ class DevCommand extends Command {
         description: 'specify framework that can be absolute path or npm package',
         type: 'string',
       },
+      require: {
+        description: 'will add to execArgv --require',
+        type: 'array',
+        alias: 'r',
+      },
     };
   }
 
@@ -40,6 +45,18 @@ class DevCommand extends Command {
     return 'Start server at local dev mode';
   }
 
+  get context() {
+    const context = super.context;
+    const { argv, execArgvObj } = context;
+    execArgvObj.require = execArgvObj.require || [];
+    // add require to execArgv
+    if (argv.require) {
+      execArgvObj.require.push(...argv.require);
+      argv.require = undefined;
+    }
+    return context;
+  }
+
   * run(context) {
     const devArgs = yield this.formatArgs(context);
     const env = {
diff --git a/lib/cmd/test.js b/lib/cmd/test.js
index dd04ef6a..c14b1efd 100644
--- a/lib/cmd/test.js
+++ b/lib/cmd/test.js
@@ -85,13 +85,19 @@ class TestCommand extends Command {
       requireArr.push(require.resolve('intelli-espower-loader'));
     }
 
+    // for power-assert
+    if (testArgv.typescript) {
+      requireArr.push(require.resolve('espower-typescript/guess'));
+    }
+
     testArgv.require = requireArr;
 
     // collect test files
     let files = testArgv._.slice();
     if (!files.length) {
-      files = [ process.env.TESTS || 'test/**/*.test.js' ];
+      files = [ process.env.TESTS || `test/**/*.test.${testArgv.typescript ? 'ts' : 'js'}` ];
     }
+
     // expand glob and skip node_modules and fixtures
     files = globby.sync(files.concat('!test/**/{fixtures, node_modules}/**/*.test.js'));
     files.sort();
@@ -108,6 +114,7 @@ class TestCommand extends Command {
     testArgv.r = undefined;
     testArgv.t = undefined;
     testArgv.g = undefined;
+    testArgv.typescript = undefined;
 
     return this.helper.unparseArgv(testArgv);
   }
diff --git a/lib/command.js b/lib/command.js
index 096a9966..a52b8758 100644
--- a/lib/command.js
+++ b/lib/command.js
@@ -1,5 +1,6 @@
 'use strict';
 
+const path = require('path');
 const BaseCommand = require('common-bin');
 
 class Command extends BaseCommand {
@@ -9,16 +10,33 @@ class Command extends BaseCommand {
       execArgv: true,
       removeAlias: true,
     };
+
+    // common-bin setter, don't care about override at sub class
+    // https://github.com/node-modules/common-bin/blob/master/lib/command.js#L158
+    this.options = {
+      typescript: {
+        description: 'whether enable typescript support, will load `ts-node/register` etc',
+        type: 'boolean',
+        alias: 'ts',
+      },
+    };
   }
 
   get context() {
     const context = super.context;
+    const { argv, debugPort, execArgvObj } = context;
 
     // compatible
-    if (context.debugPort) context.debug = context.debugPort;
+    if (debugPort) context.debug = debugPort;
 
     // remove unuse args
-    context.argv.$0 = undefined;
+    argv.$0 = undefined;
+
+    // execArgv
+    if (argv.typescript) {
+      execArgvObj.require = execArgvObj.require || [];
+      execArgvObj.require.push(path.join(__dirname, './ts-helper.js'));
+    }
 
     return context;
   }
diff --git a/lib/ts-helper.js b/lib/ts-helper.js
new file mode 100644
index 00000000..e43dfa76
--- /dev/null
+++ b/lib/ts-helper.js
@@ -0,0 +1,5 @@
+'use strict';
+
+require('ts-node').register({
+  typeCheck: true,
+});
diff --git a/package.json b/package.json
index 60159475..4dbdcad6 100644
--- a/package.json
+++ b/package.json
@@ -9,33 +9,36 @@
   },
   "dependencies": {
     "autod": "^3.0.1",
-    "chalk": "^2.3.1",
-    "co-mocha": "^1.2.1",
-    "common-bin": "^2.7.1",
+    "chalk": "^2.3.2",
+    "co-mocha": "^1.2.2",
+    "common-bin": "^2.7.2",
     "debug": "^3.1.0",
     "detect-port": "^1.2.2",
     "egg-utils": "^2.3.0",
+    "espower-typescript": "^8.1.3",
     "globby": "^8.0.1",
     "inspector-proxy": "^1.2.1",
     "intelli-espower-loader": "^1.0.1",
-    "mocha": "^5.0.1",
+    "mocha": "^5.0.5",
     "mz-modules": "^2.1.0",
-    "nyc": "^11.4.1",
+    "nyc": "^11.6.0",
     "power-assert": "^1.4.4",
     "semver": "^5.5.0",
-    "test-exclude": "^4.2.0",
+    "test-exclude": "^4.2.1",
+    "ts-node": "^5.0.1",
     "ypkgfiles": "^1.5.0"
   },
   "devDependencies": {
+    "@types/mocha": "^5.0.0",
     "autod": "^3.0.1",
     "babel": "^6.3.26",
     "babel-preset-airbnb": "^1.0.1",
     "babel-register": "^6.4.3",
     "coffee": "^4.1.0",
     "cross-env": "^3.1.3",
-    "egg": "^1.8.0",
+    "egg": "^2.5.0",
     "egg-ci": "^1.8.0",
-    "egg-mock": "^3.14.0",
+    "egg-mock": "^3.15.1",
     "enzyme": "^2.0.0",
     "eslint": "^4.12.1",
     "eslint-config-egg": "^7.0.0",
@@ -45,7 +48,8 @@
     "react": "^0.14.7",
     "react-addons-test-utils": "^0.14.7",
     "react-dom": "^0.14.7",
-    "semver": "^5.4.1"
+    "semver": "^5.4.1",
+    "typescript": "^2.7.2"
   },
   "repository": {
     "type": "git",
@@ -63,7 +67,7 @@
     "test-local": "node bin/egg-bin.js test -t 3600000",
     "cov": "nyc -r lcov -r text-summary npm run test-local",
     "ci-test-only": "TESTS=test/lib/cmd/cov.test.js npm run test-local",
-    "ci": "npm run lint && npm run pkgfiles -- --check && npm run autod -- --check && npm run ci-test-only && npm run cov",
+    "ci": "npm run lint && npm run pkgfiles -- --check && npm run ci-test-only && npm run cov",
     "autod": "node bin/egg-bin.js autod"
   },
   "engines": {
diff --git a/test/fixtures/example-ts/app.ts b/test/fixtures/example-ts/app.ts
new file mode 100644
index 00000000..a063672b
--- /dev/null
+++ b/test/fixtures/example-ts/app.ts
@@ -0,0 +1,7 @@
+'use strict';
+
+import { Application } from 'egg';
+
+export default (app: Application) => {
+  console.log(`hi, egg, ${app.config.keys}`);
+};
diff --git a/test/fixtures/example-ts/app/router.ts b/test/fixtures/example-ts/app/router.ts
new file mode 100644
index 00000000..46c83b7d
--- /dev/null
+++ b/test/fixtures/example-ts/app/router.ts
@@ -0,0 +1,9 @@
+'use strict';
+
+import { Application, Context } from 'egg';
+
+export default (app: Application) => {
+  app.router.get('/', function* (this: Context) {
+    this.body = `hi, egg`;
+  });
+};
\ No newline at end of file
diff --git a/test/fixtures/example-ts/config/config.default.ts b/test/fixtures/example-ts/config/config.default.ts
new file mode 100644
index 00000000..446264a9
--- /dev/null
+++ b/test/fixtures/example-ts/config/config.default.ts
@@ -0,0 +1,7 @@
+'use strict';
+
+export default () => {
+  const config: any = {};
+  config.keys = '123456';
+  return config;
+};
diff --git a/test/fixtures/example-ts/node_modules/egg/index.js b/test/fixtures/example-ts/node_modules/egg/index.js
new file mode 100644
index 00000000..d1757bf0
--- /dev/null
+++ b/test/fixtures/example-ts/node_modules/egg/index.js
@@ -0,0 +1,8 @@
+'use strict';
+
+module.exports = require('../../../../../node_modules/egg');
+
+setTimeout(() => {
+  console.log('exit by master test end')
+  process.exit(0);
+}, 6000);
diff --git a/test/fixtures/example-ts/node_modules/egg/package.json b/test/fixtures/example-ts/node_modules/egg/package.json
new file mode 100644
index 00000000..6697ad3f
--- /dev/null
+++ b/test/fixtures/example-ts/node_modules/egg/package.json
@@ -0,0 +1,3 @@
+{
+  "name": "egg"
+}
diff --git a/test/fixtures/example-ts/package.json b/test/fixtures/example-ts/package.json
new file mode 100644
index 00000000..1ab2c3f9
--- /dev/null
+++ b/test/fixtures/example-ts/package.json
@@ -0,0 +1,3 @@
+{
+  "name": "example-ts"
+}
\ No newline at end of file
diff --git a/test/fixtures/example-ts/test/index.test.ts b/test/fixtures/example-ts/test/index.test.ts
new file mode 100644
index 00000000..25c83639
--- /dev/null
+++ b/test/fixtures/example-ts/test/index.test.ts
@@ -0,0 +1,21 @@
+'use strict';
+
+import { Application, Context } from 'egg';
+import { default as mock, MockOption, BaseMockApplication } from 'egg-mock';
+import * as path from 'path';
+
+describe('test/index.test.ts', () => {
+  let app: BaseMockApplication<Application, Context>;
+  before(() => {
+    app = mock.app({ typescript: true } as MockOption);
+    return app.ready();
+  });
+  after(() => app.close());
+  it('should work', async () => {
+    await app
+      .httpRequest()
+      .get('/')
+      .expect('hi, egg')
+      .expect(200);
+  });
+});
diff --git a/test/fixtures/example-ts/tsconfig.json b/test/fixtures/example-ts/tsconfig.json
new file mode 100644
index 00000000..4f10abf7
--- /dev/null
+++ b/test/fixtures/example-ts/tsconfig.json
@@ -0,0 +1,19 @@
+{
+  "compilerOptions": {
+    "target": "es2017",
+    "module": "commonjs",
+    "strict": true,
+    "noImplicitAny": false,
+    "moduleResolution": "node",
+    "experimentalDecorators": true,
+    "emitDecoratorMetadata": true,
+    "pretty": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "noFallthroughCasesInSwitch": true,
+    "skipLibCheck": true,
+    "skipDefaultLibCheck": true,
+    "inlineSourceMap": true,
+    "importHelpers": true
+  },
+}
\ No newline at end of file
diff --git a/test/fixtures/require-script.js b/test/fixtures/require-script.js
new file mode 100644
index 00000000..00d46285
--- /dev/null
+++ b/test/fixtures/require-script.js
@@ -0,0 +1,3 @@
+'use strict';
+
+console.log('hey, you require me by --require');
diff --git a/test/fixtures/ts/app.js b/test/fixtures/ts/app.js
new file mode 100644
index 00000000..e46106f7
--- /dev/null
+++ b/test/fixtures/ts/app.js
@@ -0,0 +1,6 @@
+'use strict';
+
+
+module.exports = app => {
+  app.logger.info('###', require('./test.ts').default.name);
+};
diff --git a/test/fixtures/ts/config/config.default.js b/test/fixtures/ts/config/config.default.js
new file mode 100644
index 00000000..762c2647
--- /dev/null
+++ b/test/fixtures/ts/config/config.default.js
@@ -0,0 +1,3 @@
+'use strict';
+
+exports.key = '12345';
diff --git a/test/fixtures/ts/node_modules/aliyun-egg/index.js b/test/fixtures/ts/node_modules/aliyun-egg/index.js
new file mode 100644
index 00000000..c1500965
--- /dev/null
+++ b/test/fixtures/ts/node_modules/aliyun-egg/index.js
@@ -0,0 +1,20 @@
+'use strict';
+
+const egg = require('../../../../../node_modules/egg');
+
+module.exports = Object.assign({}, egg);
+
+module.exports.startCluster = options => {
+  console.log('options.typescript=%s', options.typescript);
+  console.log('options: %j', options);
+  if (process.execArgv.length) {
+    console.log('process.execArgv:', process.execArgv);
+  }
+
+  // make sure exit
+  setTimeout(() => {
+    console.log('exit by master test end')
+    process.exit(0);
+  }, 5000);
+  return egg.startCluster(options);
+};
diff --git a/test/fixtures/ts/node_modules/aliyun-egg/package.json b/test/fixtures/ts/node_modules/aliyun-egg/package.json
new file mode 100644
index 00000000..4e36e661
--- /dev/null
+++ b/test/fixtures/ts/node_modules/aliyun-egg/package.json
@@ -0,0 +1,6 @@
+{
+  "name": "aliyun-egg",
+  "dependencies": {
+    "egg": "*"
+  }
+}
diff --git a/test/fixtures/ts/package.json b/test/fixtures/ts/package.json
new file mode 100644
index 00000000..3cb71fd5
--- /dev/null
+++ b/test/fixtures/ts/package.json
@@ -0,0 +1,6 @@
+{
+  "name": "ts",
+  "egg": {
+    "framework": "aliyun-egg"
+  }
+}
\ No newline at end of file
diff --git a/test/fixtures/ts/test.ts b/test/fixtures/ts/test.ts
new file mode 100644
index 00000000..61519692
--- /dev/null
+++ b/test/fixtures/ts/test.ts
@@ -0,0 +1,3 @@
+'use strict';
+
+export default { name: 'egg from ts' };
diff --git a/test/fixtures/ts/test/a.test.js b/test/fixtures/ts/test/a.test.js
new file mode 100644
index 00000000..32c1eddc
--- /dev/null
+++ b/test/fixtures/ts/test/a.test.js
@@ -0,0 +1,7 @@
+'use strict';
+
+describe('a.test.js', () => {
+  it('should success', () => {
+    throw 'should not load js files';
+  });
+});
diff --git a/test/fixtures/ts/test/sub.ts b/test/fixtures/ts/test/sub.ts
new file mode 100644
index 00000000..61519692
--- /dev/null
+++ b/test/fixtures/ts/test/sub.ts
@@ -0,0 +1,3 @@
+'use strict';
+
+export default { name: 'egg from ts' };
diff --git a/test/fixtures/ts/test/typescript.test.ts b/test/fixtures/ts/test/typescript.test.ts
new file mode 100644
index 00000000..afe066d7
--- /dev/null
+++ b/test/fixtures/ts/test/typescript.test.ts
@@ -0,0 +1,17 @@
+'use strict';
+
+const assert = require('assert');
+
+describe('typescript.test.ts', () => {
+  it('should success', () => {
+    const obj = require('./sub');
+    console.log('###', obj.default.name);
+    assert(obj.default.name === 'egg from ts');
+  });
+
+  it('should fail', () => {
+    const obj = require('./sub');
+    console.log('###', obj.default.name);
+    assert(obj.default.name === 'wrong assert ts');
+  });
+});
diff --git a/test/fixtures/ts/tsconfig.json b/test/fixtures/ts/tsconfig.json
new file mode 100644
index 00000000..4f10abf7
--- /dev/null
+++ b/test/fixtures/ts/tsconfig.json
@@ -0,0 +1,19 @@
+{
+  "compilerOptions": {
+    "target": "es2017",
+    "module": "commonjs",
+    "strict": true,
+    "noImplicitAny": false,
+    "moduleResolution": "node",
+    "experimentalDecorators": true,
+    "emitDecoratorMetadata": true,
+    "pretty": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "noFallthroughCasesInSwitch": true,
+    "skipLibCheck": true,
+    "skipDefaultLibCheck": true,
+    "inlineSourceMap": true,
+    "importHelpers": true
+  },
+}
\ No newline at end of file
diff --git a/test/lib/cmd/cov.test.js b/test/lib/cmd/cov.test.js
index 727ebe81..16064e51 100644
--- a/test/lib/cmd/cov.test.js
+++ b/test/lib/cmd/cov.test.js
@@ -14,7 +14,14 @@ describe('test/lib/cmd/cov.test.js', () => {
   beforeEach(() => rimraf(path.join(cwd, 'coverage')));
   afterEach(mm.restore);
 
-  it('should success', done => {
+  function assertCoverage(cwd) {
+    assert.ok(fs.existsSync(path.join(cwd, 'coverage/coverage-final.json')));
+    assert.ok(fs.existsSync(path.join(cwd, 'coverage/coverage-summary.json')));
+    assert.ok(fs.existsSync(path.join(cwd, 'coverage/lcov-report/index.html')));
+    assert.ok(fs.existsSync(path.join(cwd, 'coverage/lcov.info')));
+  }
+
+  it('should success', function* () {
     mm(process.env, 'TESTS', 'test/**/*.test.js');
     mm(process.env, 'NYC_CWD', cwd);
     const child = coffee.fork(eggBin, [ 'cov' ], { cwd })
@@ -29,18 +36,12 @@ describe('test/lib/cmd/cov.test.js', () => {
       child.expect('stdout', /Statements {3}: 80% \( 4[\/|\\]5 \)/);
     }
 
-    child.expect('code', 0)
-      .end(err => {
-        assert.ifError(err);
-        assert.ok(fs.existsSync(path.join(cwd, 'coverage/coverage-final.json')));
-        assert.ok(fs.existsSync(path.join(cwd, 'coverage/coverage-summary.json')));
-        assert.ok(fs.existsSync(path.join(cwd, 'coverage/lcov-report/index.html')));
-        assert.ok(fs.existsSync(path.join(cwd, 'coverage/lcov.info')));
-        done();
-      });
+    yield child.expect('code', 0).end();
+    // only test on npm run test
+    if (!process.env.NYC_ROOT_ID) assertCoverage(cwd);
   });
 
-  it('should hotfixSpawnWrap success on mock windows', done => {
+  it('should hotfixSpawnWrap success on mock windows', function* () {
     mm(process.env, 'TESTS', 'test/**/*.test.js');
     mm(process.env, 'NYC_CWD', cwd);
     const child = coffee.fork(eggBin, [ 'cov' ], { cwd })
@@ -55,15 +56,10 @@ describe('test/lib/cmd/cov.test.js', () => {
     if (!process.env.NYC_ROOT_ID) {
       child.expect('stdout', /Statements {3}: 80% \( 4[\/|\\]5 \)/);
     }
-    child.expect('code', 0)
-      .end(err => {
-        assert.ifError(err);
-        assert.ok(fs.existsSync(path.join(cwd, 'coverage/coverage-final.json')));
-        assert.ok(fs.existsSync(path.join(cwd, 'coverage/coverage-summary.json')));
-        assert.ok(fs.existsSync(path.join(cwd, 'coverage/lcov-report/index.html')));
-        assert.ok(fs.existsSync(path.join(cwd, 'coverage/lcov.info')));
-        done();
-      });
+
+    yield child.expect('code', 0).end();
+    // only test on npm run test
+    if (!process.env.NYC_ROOT_ID) assertCoverage(cwd);
   });
 
   it('should success with COV_EXCLUDES', function* () {
@@ -82,11 +78,12 @@ describe('test/lib/cmd/cov.test.js', () => {
     }
 
     yield child.expect('code', 0).end();
-    assert(fs.existsSync(path.join(cwd, 'coverage/coverage-final.json')));
-    assert(fs.existsSync(path.join(cwd, 'coverage/lcov-report/index.html')));
-    assert(fs.existsSync(path.join(cwd, 'coverage/lcov.info')));
-    const lcov = fs.readFileSync(path.join(cwd, 'coverage/lcov.info'), 'utf8');
-    assert(!/ignore[\/|\\]a.js/.test(lcov));
+    // only test on npm run test
+    if (!process.env.NYC_ROOT_ID) {
+      assertCoverage(cwd);
+      const lcov = fs.readFileSync(path.join(cwd, 'coverage/lcov.info'), 'utf8');
+      assert(!/ignore[\/|\\]a.js/.test(lcov));
+    }
   });
 
   it('should success with -x to ignore one dirs', function* () {
@@ -103,11 +100,12 @@ describe('test/lib/cmd/cov.test.js', () => {
     }
 
     yield child.expect('code', 0).end();
-    assert(fs.existsSync(path.join(cwd, 'coverage/coverage-final.json')));
-    assert(fs.existsSync(path.join(cwd, 'coverage/lcov-report/index.html')));
-    assert(fs.existsSync(path.join(cwd, 'coverage/lcov.info')));
-    const lcov = fs.readFileSync(path.join(cwd, 'coverage/lcov.info'), 'utf8');
-    assert(!/ignore[\/|\\]a.js/.test(lcov));
+    // only test on npm run test
+    if (!process.env.NYC_ROOT_ID) {
+      assertCoverage(cwd);
+      const lcov = fs.readFileSync(path.join(cwd, 'coverage/lcov.info'), 'utf8');
+      assert(!/ignore[\/|\\]a.js/.test(lcov));
+    }
   });
 
   it('should success with -x to ignore multi dirs', function* () {
@@ -124,11 +122,12 @@ describe('test/lib/cmd/cov.test.js', () => {
     }
 
     yield child.expect('code', 0).end();
-    assert(fs.existsSync(path.join(cwd, 'coverage/coverage-final.json')));
-    assert(fs.existsSync(path.join(cwd, 'coverage/lcov-report/index.html')));
-    assert(fs.existsSync(path.join(cwd, 'coverage/lcov.info')));
-    const lcov = fs.readFileSync(path.join(cwd, 'coverage/lcov.info'), 'utf8');
-    assert(!/ignore[\/|\\]a.js/.test(lcov));
+    // only test on npm run test
+    if (!process.env.NYC_ROOT_ID) {
+      assertCoverage(cwd);
+      const lcov = fs.readFileSync(path.join(cwd, 'coverage/lcov.info'), 'utf8');
+      assert(!/ignore[\/|\\]a.js/.test(lcov));
+    }
   });
 
   it('should fail when test fail', done => {
diff --git a/test/lib/cmd/dev.test.js b/test/lib/cmd/dev.test.js
index cdaf7c13..230d5dca 100644
--- a/test/lib/cmd/dev.test.js
+++ b/test/lib/cmd/dev.test.js
@@ -137,4 +137,14 @@ describe('test/lib/cmd/dev.test.js', () => {
       .expect('code', 0)
       .end(done);
   });
+
+  it('should support --require', () => {
+    const script = path.join(__dirname, '../../fixtures/require-script');
+    mm(process.env, 'NODE_ENV', 'development');
+    return coffee.fork(eggBin, [ 'dev', '--require', script ], { cwd })
+      // .debug()
+      .expect('stdout', /hey, you require me by --require/)
+      .expect('code', 0)
+      .end();
+  });
 });
diff --git a/test/ts.test.js b/test/ts.test.js
new file mode 100644
index 00000000..3993cd02
--- /dev/null
+++ b/test/ts.test.js
@@ -0,0 +1,64 @@
+'use strict';
+
+const path = require('path');
+const coffee = require('coffee');
+const mm = require('mm');
+
+describe('test/ts.test.js', () => {
+  const eggBin = require.resolve('../bin/egg-bin');
+  let cwd;
+
+  afterEach(mm.restore);
+
+  it('should support ts', () => {
+    cwd = path.join(__dirname, './fixtures/ts');
+    mm(process.env, 'NODE_ENV', 'development');
+    return coffee.fork(eggBin, [ 'dev', '--typescript' ], { cwd })
+      .debug()
+      .expect('stdout', /### egg from ts/)
+      .expect('stdout', /options.typescript=true/)
+      .expect('stdout', /started/)
+      .expect('code', 0)
+      .end();
+  });
+
+  it('should support ts test', () => {
+    cwd = path.join(__dirname, './fixtures/ts');
+    mm(process.env, 'NODE_ENV', 'development');
+    return coffee.fork(eggBin, [ 'test', '--typescript' ], { cwd })
+      .debug()
+      .notExpect('stdout', /false == true/)
+      .notExpect('stdout', /should not load js files/)
+      .expect('stdout', /--- \[string\] 'wrong assert ts'/)
+      .expect('code', 1)
+      .end();
+  });
+
+  it('should start app', () => {
+    if (process.env.EGG_VERSION && process.env.EGG_VERSION === '1') {
+      console.log('skip egg@1');
+      return;
+    }
+    cwd = path.join(__dirname, './fixtures/example-ts');
+    return coffee.fork(eggBin, [ 'dev', '--ts' ], { cwd })
+      .debug()
+      .expect('stdout', /hi, egg, 12345/)
+      .expect('stdout', /started/)
+      .expect('code', 0)
+      .end();
+  });
+
+  it('should test app', () => {
+    if (process.env.EGG_VERSION && process.env.EGG_VERSION === '1') {
+      console.log('skip egg@1');
+      return;
+    }
+    cwd = path.join(__dirname, './fixtures/example-ts');
+    return coffee.fork(eggBin, [ 'test', '--ts' ], { cwd })
+      .debug()
+      .expect('stdout', /hi, egg, 123456/)
+      .expect('stdout', /should work/)
+      .expect('code', 0)
+      .end();
+  });
+});