diff --git a/modules/oe_content_persistent/tests/src/Functional/PersistentUrlControllerTest.php b/modules/oe_content_persistent/tests/src/Functional/PersistentUrlControllerTest.php
index a546ffc3b..8bafa975d 100644
--- a/modules/oe_content_persistent/tests/src/Functional/PersistentUrlControllerTest.php
+++ b/modules/oe_content_persistent/tests/src/Functional/PersistentUrlControllerTest.php
@@ -83,7 +83,7 @@ public function testPersistentUrlController(): void {
     $this->assertResponse(404);
 
     // Not valid uuid.
-    $this->drupalGet('/content/' . $this->randomString());
+    $this->drupalGet('/content/' . $this->randomMachineName());
     $this->assertResponse(404);
 
     // Create a new node that will be sent to the home page by the controller.