diff --git a/test/addons/dlopen-ping-pong/test.js b/test/addons/dlopen-ping-pong/test.js
index 9f07715cf1..c533593496 100644
--- a/test/addons/dlopen-ping-pong/test.js
+++ b/test/addons/dlopen-ping-pong/test.js
@@ -11,7 +11,7 @@ const os = require('os');
 const bindingPath = require.resolve(`./build/${common.buildType}/binding`);
 process.dlopen(module, bindingPath,
                os.constants.dlopen.RTLD_NOW | os.constants.dlopen.RTLD_GLOBAL);
-module.exports.load(path.dirname(bindingPath) + '/ping.so');
+module.exports.load(`${path.dirname(bindingPath)}/ping.so`);
 assert.strictEqual(module.exports.ping(), 'pong');
 
 // Check that after the addon is loaded with