diff --git a/tests/PHPUnit/proxy/index.php b/tests/PHPUnit/proxy/index.php
index f9ef61fddc65de96a8336b49a0d07999495ed53b..e41b84edd90338d94893b83522a2886bd2717871 100644
--- a/tests/PHPUnit/proxy/index.php
+++ b/tests/PHPUnit/proxy/index.php
@@ -10,7 +10,7 @@ require realpath(dirname(__FILE__)) . "/includes.php";
 
 Piwik_TestingEnvironment::addHooks();
 
-if (empty($_GET['ignoreClearAllViewDataTableParameters'])) {
+if (\Piwik\SettingsPiwik::isPiwikInstalled()) {
     \Piwik\ViewDataTable\Manager::clearAllViewDataTableParameters();
 }