diff --git a/package.json b/package.json
index 6f954a6..ef1a94a 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ci-task-runner",
-  "version": "1.0.4-beta",
+  "version": "1.0.4",
   "description": "this is a multiprocess building tasks scheduler",
   "main": "src/index.js",
   "bin": "bin/ci-task-runner",
diff --git a/src/run-cmd.js b/src/run-cmd.js
index 6ff5f93..7e617bd 100644
--- a/src/run-cmd.js
+++ b/src/run-cmd.js
@@ -18,11 +18,10 @@ const run = (cmd, { env, cwd, uid, gid }, callback) => {
 
     proc.on('error', procError);
     proc.on('close', function (code, signal) {
-        let er;
         if (signal) {
             process.kill(process.pid, signal);
         } else if (code) {
-            er = new Error('Exit status ' + code);
+            const er = new Error(`child process exited with code ${code}`);
             er.errno = code;
             procError(er)
         } else {
@@ -89,7 +88,7 @@ module.exports = (command, options = {}) => {
             clearTimeout(timer);
 
             if (errors) {
-                errors.messsage = `"${command}": ${errors.messsage}`;
+                errors.message = `run "${command}" failed: ${errors.message}`;
                 reject(errors);
             } else {
                 resolve(data);
diff --git a/src/run-tasks.js b/src/run-tasks.js
index 0f931a8..c51b224 100644
--- a/src/run-tasks.js
+++ b/src/run-tasks.js
@@ -1,6 +1,6 @@
 const queue = require('./queue');
 const Loger = require('./loger');
-const worker = require('./run-cmd');
+const runCmd = require('./run-cmd');
 const PACKAGE = require('../package.json');
 
 
@@ -30,7 +30,7 @@ module.exports = (tasks, parallel = require('os').cpus().length) => {
         const loger = new Loger([null, ...logStyles]);
         loger.log('░░', `${PACKAGE.name}:`, task.name, '[running]');
 
-        return worker(program.command, program.options).then(() => {
+        return runCmd(program.command, program.options).then(() => {
 
             const loger = new Loger([{ color: 'green' }, ...logStyles]);
             const timeEnd = Math.round((Date.now() - time) / 1000)
diff --git a/test/run-cmd.test.js b/test/run-cmd.test.js
index 8141a1f..bd53b26 100644
--- a/test/run-cmd.test.js
+++ b/test/run-cmd.test.js
@@ -1,13 +1,13 @@
 const assert = require('assert');
-const worker = require('../src/run-cmd');
+const runCmd = require('../src/run-cmd');
 
-describe('#worker', () => {
+describe('#runCmd', () => {
     it('exec script', () => {
-        return worker('echo "hello"');
+        return runCmd('echo "hello"');
     });
 
     // it('childProcess.exec error', () => {
-    //     return worker("", {
+    //     return runCmd("", {
     //         cwd: {}
     //     }).then(() => {
     //         throw new Error('error');
@@ -17,7 +17,7 @@ describe('#worker', () => {
     // });
 
     it('exec error', () => {
-        return worker(`@error%`, {
+        return runCmd(`@error%`, {
             timeout: 100
         }).then(() => {
             throw new Error('error');
@@ -27,7 +27,7 @@ describe('#worker', () => {
     });
 
     it('options.timeout', () => {
-        return worker(`node -e "setTimeout(()=> {}, 3000)"`, {
+        return runCmd(`node -e "setTimeout(()=> {}, 3000)"`, {
             timeout: 100
         }).then(() => {
             throw new Error('options.timeout: error');