diff --git a/tests/Unit/TestCase.php b/tests/Unit/TestCase.php
index 20b756db79..769e30e1da 100644
--- a/tests/Unit/TestCase.php
+++ b/tests/Unit/TestCase.php
@@ -155,7 +155,7 @@ public function createAccount(string $username, string $password, string $groupN
 
 		$user = $userManager->get($username);
 		if (!$user) {
-			$user = $userManager->createUser($username, $password);
+			$user = @$userManager->createUser($username, $password);
 		}
 		$group = $groupManager->get($groupName);
 		if (!$group) {