diff --git a/src/test/java/gageot/net/MainWebTest.java b/src/test/java/gageot/net/MainWebTest.java
index bbeb730..06f64b3 100644
--- a/src/test/java/gageot/net/MainWebTest.java
+++ b/src/test/java/gageot/net/MainWebTest.java
@@ -39,9 +39,10 @@ public void create(String message) {
     }
   };
 
-  WebServer webServer = new WebServer().configure(
-      override(new MainWeb.WebConfiguration())
-          .with(routes -> routes.setIocAdapter(new Singletons().register(Messages.class, messages))));
+  WebServer webServer = new WebServer()
+    .configure(override(new MainWeb.WebConfiguration())
+      .with(routes -> routes.setIocAdapter(new Singletons().register(Messages.class, messages))))
+    .startOnRandomPort();
 
   @Override
   protected String getDefaultBaseUrl() {