diff --git a/lib/cmd/debug.js b/lib/cmd/debug.js
index ff7abbb7..242e50a0 100644
--- a/lib/cmd/debug.js
+++ b/lib/cmd/debug.js
@@ -12,14 +12,21 @@ class DebugCommand extends Command {
       // set default to empty so `--inspect` will always pass to fork
       inspect: {
         description: 'V8 Inspector port',
-        default: newDebugger ? '' : undefined,
+        default() {
+          /* istanbul ignore next */
+          return newDebugger ? '' : undefined;
+        },
       },
       'inspect-brk': {
         description: 'whether break at start',
       },
+
       debug: {
         description: 'legacy debugger',
-        default: newDebugger ? undefined : '',
+        default() {
+          /* istanbul ignore next */
+          return newDebugger ? undefined : '';
+        },
       },
     };
     process.env.EGG_DEBUG = 'true';
diff --git a/lib/command.js b/lib/command.js
index 060971d7..3f7a93ee 100644
--- a/lib/command.js
+++ b/lib/command.js
@@ -35,7 +35,6 @@ class Command extends BaseCommand {
 
     // remove unuse args
     argv.$0 = undefined;
-    argv.v = undefined;
 
     return context;
   }
diff --git a/package.json b/package.json
index f8701309..b5fdcc53 100644
--- a/package.json
+++ b/package.json
@@ -11,7 +11,7 @@
     "autod": "^2.9.0",
     "change-case": "^3.0.1",
     "co-mocha": "^1.2.0",
-    "common-bin": "^2.6.0",
+    "common-bin": "^2.6.1",
     "debug": "^3.0.1",
     "detect-port": "^1.2.1",
     "egg-utils": "^2.2.0",
diff --git a/test/lib/cmd/autod.test.js b/test/lib/cmd/autod.test.js
index 89b508bc..60024762 100644
--- a/test/lib/cmd/autod.test.js
+++ b/test/lib/cmd/autod.test.js
@@ -6,10 +6,19 @@ const coffee = require('coffee');
 const eggBin = require.resolve('../../../bin/egg-bin.js');
 
 describe('test/lib/cmd/autod.test.js', () => {
+  it('should autod modify', function* () {
+    const cwd = path.join(__dirname, '../../fixtures/autod-missing');
+    yield coffee.fork(eggBin, [ 'autod' ], { cwd })
+      // .debug()
+      .expect('stdout', /"urllib": "\d+.\d+.\d+/)
+      .expect('code', 0)
+      .end();
+  });
+
   it('should autod check fail', function* () {
     const cwd = path.join(__dirname, '../../fixtures/autod-missing');
     yield coffee.fork(eggBin, [ 'autod', '--check' ], { cwd })
-      .debug()
+      // .debug()
       .expect('code', 1)
       .expect('stderr', /\[ERROR\] Missing dependencies: \["urllib"\]/)
       .end();
@@ -18,7 +27,7 @@ describe('test/lib/cmd/autod.test.js', () => {
   it('should autod check pass', function* () {
     const cwd = path.join(__dirname, '../../fixtures/autod-exists');
     yield coffee.fork(eggBin, [ 'autod', '--check' ], { cwd })
-      .debug()
+      // .debug()
       .expect('code', 0)
       .end();
   });
diff --git a/test/lib/cmd/cov.test.js b/test/lib/cmd/cov.test.js
index 9d83a4c6..d37883b0 100644
--- a/test/lib/cmd/cov.test.js
+++ b/test/lib/cmd/cov.test.js
@@ -42,7 +42,7 @@ describe('test/lib/cmd/cov.test.js', () => {
     mm(process.env, 'TESTS', 'test/**/*.test.js');
     mm(process.env, 'NYC_CWD', cwd);
     const child = coffee.fork(eggBin, [ 'cov' ], { cwd })
-      .debug()
+      // .debug()
       .beforeScript(path.join(__dirname, 'mock-win32.js'))
       .expect('stdout', /should success/)
       .expect('stdout', /a\.test\.js/)
@@ -79,8 +79,7 @@ describe('test/lib/cmd/cov.test.js', () => {
       child.expect('stdout', /Statements {3}: 75% \( 3[\/|\\]4 \)/);
     }
 
-    yield child.expect('code', 0)
-      .end();
+    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')));
@@ -101,8 +100,7 @@ describe('test/lib/cmd/cov.test.js', () => {
       child.expect('stdout', /Statements {3}: 75% \( 3[\/|\\]4 \)/);
     }
 
-    yield child.expect('code', 0)
-      .end();
+    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')));
@@ -123,8 +121,7 @@ describe('test/lib/cmd/cov.test.js', () => {
       child.expect('stdout', /Statements {3}: 75% \( 3[\/|\\]4 \)/);
     }
 
-    yield child.expect('code', 0)
-      .end();
+    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')));
diff --git a/test/lib/cmd/debug.test.js b/test/lib/cmd/debug.test.js
index c9a7f7d3..594cffa3 100644
--- a/test/lib/cmd/debug.test.js
+++ b/test/lib/cmd/debug.test.js
@@ -37,7 +37,7 @@ describe('test/lib/cmd/debug.test.js', () => {
   it('should debug with $NODE_DEBUG_OPTION', () => {
     const env = Object.assign({}, process.env, { NODE_DEBUG_OPTION: '--inspect=5555' });
     return coffee.fork(eggBin, [ 'debug' ], { cwd, env })
-      .debug()
+      // .debug()
       .expect('stderr', /Debugger listening.*5555/)
       .expect('stdout', /"workers":1/)
       .expect('code', 0)