diff --git a/tests/integration/Core/Tester.php b/tests/integration/Core/Tester.php
index d0348ee98b..875fc84b90 100644
--- a/tests/integration/Core/Tester.php
+++ b/tests/integration/Core/Tester.php
@@ -146,7 +146,7 @@ class Tester
     {
         $configData = $this->getTestConfigData();
 
-        if ($configData[$optionName] === $data) {
+        if (array_key_exists($optionName, $configData) && $configData[$optionName] === $data) {
             return true;
         }