diff --git a/test/function/samples/resolveid-is-entry/_config.js b/test/function/samples/resolveid-is-entry/_config.js
index 2cbc44ca45e..fc810508a42 100644
--- a/test/function/samples/resolveid-is-entry/_config.js
+++ b/test/function/samples/resolveid-is-entry/_config.js
@@ -1,7 +1,7 @@
 const assert = require('assert');
 const path = require('path');
 
-const ID_MAIN = path.join(__dirname, 'main.js');
+const ID_MAIN = path.resolve(__dirname, 'main.js');
 
 module.exports = {
 	description: 'sends correct isEntry information to resolveId hooks',