diff --git a/core/modules/system/tests/src/Unit/Transliteration/MachineNameControllerTest.php b/core/modules/system/tests/src/Unit/Transliteration/MachineNameControllerTest.php
index dbd1f1a..8cddd82 100644
--- a/core/modules/system/tests/src/Unit/Transliteration/MachineNameControllerTest.php
+++ b/core/modules/system/tests/src/Unit/Transliteration/MachineNameControllerTest.php
@@ -103,7 +103,7 @@ public function testMachineNameController(array $request_params, $expected_conte
   public function testMachineNameControllerWithInvalidReplacePattern() {
     $request = Request::create('', 'GET', ['text' => 'Bob', 'langcode' => 'en', 'replace' => 'Alice', 'replace_pattern' => 'Bob', 'replace_token' => 'invalid']);
 
-    $this->setExpectedException(AccessDeniedException::class, "Invalid 'replace_token' query parameter.");
+    $this->setExpectedException(AccessDeniedException::class, "Invalid X 'replace_token' query parameter.");
     $this->machineNameController->transliterate($request);
   }