diff --git a/tests/bootstrap.php b/tests/bootstrap.php
index 35a98023f8..79e1918752 100644
--- a/tests/bootstrap.php
+++ b/tests/bootstrap.php
@@ -29,7 +29,7 @@
 
 require dirname(__DIR__) . '/config/bootstrap.php';
 
-if (empty($_SERVER['HTTP_HOST'])) {
+if (empty($_SERVER['HTTP_HOST']) && !Configure::read('App.fullBaseUrl')) {
     Configure::write('App.fullBaseUrl', 'http://localhost');
 }