diff --git a/src/index.ts b/src/index.ts
index 117ec79..5a135bb 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -15,6 +15,8 @@ export const unpluginFactory: UnpluginFactory<Options | undefined> = (rawOptions
   const options = resolveOptions(rawOptions)
 
   async function detectPort() {
+    // eslint-disable-next-line no-console
+    console.log('detect port')
     const isAvailable = await checkPort(options.port!)
     if (!isAvailable)
       options.port = await getRandomPort()