diff --git a/lib/helper.js b/lib/helper.js
index 1480489..9c5f29e 100644
--- a/lib/helper.js
+++ b/lib/helper.js
@@ -49,7 +49,7 @@ exports.forkNode = (modulePath, args = [], options = {}) => {
   const proc = cp.fork(modulePath, args, options);
   gracefull(proc);
 
-  return new Promise((resolve, reject) => {
+  const promise = new Promise((resolve, reject) => {
     proc.once('exit', code => {
       childs.delete(proc);
       if (code !== 0) {
@@ -61,6 +61,10 @@ exports.forkNode = (modulePath, args = [], options = {}) => {
       }
     });
   });
+
+  promise.proc = proc;
+
+  return promise;
 };
 
 /**
diff --git a/test/fixtures/my-helper/command/fork.js b/test/fixtures/my-helper/command/fork.js
index 9448ad2..b72d02f 100644
--- a/test/fixtures/my-helper/command/fork.js
+++ b/test/fixtures/my-helper/command/fork.js
@@ -14,7 +14,9 @@ class ForkCommand extends Command {
   }
 
   * run({ argv, rawArgv }) {
-    yield this.helper.forkNode(path.join(__dirname, '../scripts', argv.target), rawArgv.concat('--from=test'));
+    const task = this.helper.forkNode(path.join(__dirname, '../scripts', argv.target), rawArgv.concat('--from=test'));
+    console.log('task proc: %s', !!task.proc);
+    yield task;
   }
 
   get description() {
diff --git a/test/fixtures/my-helper/scripts/test_script.js b/test/fixtures/my-helper/scripts/test_script.js
index 4852dfe..7a6ae1b 100644
--- a/test/fixtures/my-helper/scripts/test_script.js
+++ b/test/fixtures/my-helper/scripts/test_script.js
@@ -4,3 +4,4 @@
 
 console.log('node version: %s', process.version);
 console.log('process.argv: %j', process.argv.slice(2));
+console.log('process.pid: %s, process.ppid: %s', process.pid, process.ppid);
diff --git a/test/my-helper.test.js b/test/my-helper.test.js
index 4402cda..e495915 100644
--- a/test/my-helper.test.js
+++ b/test/my-helper.test.js
@@ -35,6 +35,7 @@ describe('test/my-helper.test.js', () => {
     coffee.fork(myBin, [ 'fork', '--target=test_script' ], { cwd })
       // .debug()
       // .coverage(false)
+      .expect('stdout', /task proc: true/)
       .expect('stdout', /process.argv: \["--target=test_script","--from=test"]/)
       .expect('code', 0)
       .end(done);