diff --git a/index.test.js b/index.test.js
index 9725109..a6f1485 100644
--- a/index.test.js
+++ b/index.test.js
@@ -19,5 +19,5 @@ test('wait 500 ms', async() => {
 test('test runs', () => {
     process.env['INPUT_MILLISECONDS'] = 500;
     const ip = path.join(__dirname, 'index.js');
-    console.log(cp.execSync(`node ${ip}`).toString());
+    console.log(cp.execSync(`node ${ip}`, { env: process.env }).toString());
 })