diff --git a/tests/php/Dev/DeprecationTest.php b/tests/php/Dev/DeprecationTest.php
index ed6018714..b447866a0 100644
--- a/tests/php/Dev/DeprecationTest.php
+++ b/tests/php/Dev/DeprecationTest.php
@@ -43,7 +43,7 @@ class DeprecationTest extends SapphireTest
     protected function tearDown(): void
     {
         Deprecation::disable();
-        set_error_handler($this->oldHandler);
+        restore_error_handler();
         $this->oldHandler = null;
         parent::tearDown();
     }