diff --git a/lib/private/AppFramework/Utility/SimpleContainer.php b/lib/private/AppFramework/Utility/SimpleContainer.php
index 97cb772e3b..c2c2964b02 100644
--- a/lib/private/AppFramework/Utility/SimpleContainer.php
+++ b/lib/private/AppFramework/Utility/SimpleContainer.php
@@ -66,7 +66,7 @@ class SimpleContainer extends Container implements IContainer {
 				try {
 					$parameters[] = $this->query($resolveName);
 				} catch (\Exception $e) {
-					if (class_exists("PHPUnit_Framework_AssertionFailedError") &&
+					if (class_exists("PHPUnit_Framework_AssertionFailedError", false) &&
 						$e instanceof \PHPUnit_Framework_AssertionFailedError) {
 						// Easier debugging of "Your test case is not allowed to access the database."
 						throw $e;