diff --git a/lib/process.js b/lib/process.js
index d8e90a8..01ead27 100644
--- a/lib/process.js
+++ b/lib/process.js
@@ -14,7 +14,11 @@
   module.exports = (command, args, opt) => {
     const childProcess = require('child_process');
     const merge = require('merge');
-    const finalOpt = merge({'shell': true}, opt);
+    const defaultOptions = {
+      'shell': true,
+      'stdio': [process.stdin, 'pipe', 'pipe'],
+    };
+    const finalOpt = merge(defaultOptions, opt);
     return new Promise((res, rej) => {
       const proc = childProcess.spawn(
         [].concat(command).join('&&'), args, finalOpt
diff --git a/package.json b/package.json
index 5807a53..0460a89 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "simple-process",
-  "version": "1.0.8",
+  "version": "1.0.9",
   "description": "Child process that uses Promise Object",
   "main": "index.js",
   "scripts": {
diff --git a/tests/unit/test_pyvenv.js b/tests/unit/test_pyvenv.js
index ef7b82d..4f86a9f 100644
--- a/tests/unit/test_pyvenv.js
+++ b/tests/unit/test_pyvenv.js
@@ -30,10 +30,10 @@
       });
       it('Should call processCall with proper args.', () => {
         expect(promiseProcessMock.calledOnce).to.be.true;
-        expect(promiseProcessMock.getCall(0).args[0]).to.eql([
+        expect(promiseProcessMock.getCall(0).args).to.eql([[
           `. ${path.join(process.cwd(), 'venv', 'bin', 'activate')}`,
           testCommand, 'deactivate',
-        ]);
+        ]]);
       });
       it('The return value should be an instance of promise', () => {
         expect(ret).to.eql({});
@@ -56,10 +56,10 @@
       });
       it('Should call processCall with proper args.', () => {
         expect(promiseProcessMock.calledOnce).to.be.true;
-        expect(promiseProcessMock.getCall(0).args[0]).to.eql([].concat(
+        expect(promiseProcessMock.getCall(0).args).to.eql([[].concat(
           `. ${path.join(process.cwd(), 'venv', 'bin', 'activate')}`,
           testCommand, 'deactivate'
-        ));
+        )]);
       });
       it('The return value should be an instance of promise', () => {
         expect(ret).to.eql({});
@@ -78,10 +78,10 @@
       });
       it('Should call processCall with proper args.', () => {
         expect(promiseProcessMock.calledOnce).to.be.true;
-        expect(promiseProcessMock.getCall(0).args[0]).to.eql([
+        expect(promiseProcessMock.getCall(0).args).to.eql([[
           `. ${path.join('test', 'bin', 'activate')}`,
           testCommand, 'deactivate',
-        ]);
+        ]]);
       });
       it('The return value should be an instance of promise', () => {
         expect(ret).to.eql({});
@@ -100,10 +100,10 @@
       });
       it('Should call processCall with proper args.', () => {
         expect(promiseProcessMock.calledOnce).to.be.true;
-        expect(promiseProcessMock.getCall(0).args[0]).to.eql([
+        expect(promiseProcessMock.getCall(0).args).to.eql([[
           `. ${path.join('test', 'bin', 'activate')}`,
           testCommand, 'deactivate',
-        ]);
+        ]]);
       });
       it('The return value should be an instance of promise', () => {
         expect(ret).to.eql({});
diff --git a/tests/unit/test_spawn.js b/tests/unit/test_spawn.js
index 90294f5..3ba3986 100644
--- a/tests/unit/test_spawn.js
+++ b/tests/unit/test_spawn.js
@@ -49,6 +49,7 @@
           expect(spawn.callCount).to.equal(1);
           expect(spawn.calledWithExactly(expectedCommand, undefined, {
             'shell': true,
+            'stdio': [process.stdin, 'pipe', 'pipe'],
           })).is.true;
         });
         it('Should assign stdout data event', () => {
@@ -72,12 +73,14 @@
       const testCommand = 'jugemjugemgokohnosurikire';
       const testArgs = ['--kayjare=\'suygyo\'', '--soygyo=\'matsu\''];
       beforeEach(() => {
-        promiseProcess(testCommand, testArgs, {'shell': false});
+        promiseProcess(
+          testCommand, testArgs, {'shell': false, 'stdio': 'pipe'}
+        );
       });
       it('Should call spawn with the command', () => {
         expect(spawn.callCount).to.equal(1);
         expect(spawn.calledWithExactly(testCommand, testArgs, {
-          'shell': false,
+          'shell': false, 'stdio': 'pipe',
         })).is.true;
       });
       it('Should assign stdout data event', () => {