diff --git a/tests/test_framework/phpbb_test_case.php b/tests/test_framework/phpbb_test_case.php
index cd71fcaf28..726f6671ae 100644
--- a/tests/test_framework/phpbb_test_case.php
+++ b/tests/test_framework/phpbb_test_case.php
@@ -35,8 +35,6 @@ class phpbb_test_case extends TestCase
 			'phpbb_database_test_case' => ['already_connected', 'last_post_timestamp'],
 		];
 		$this->excludeBackupStaticAttributes($backupStaticAttributesBlacklist);
-
-		set_error_handler([$this, 'trigger_error_callback']);
 	}
 
 	public function get_test_case_helpers()
@@ -137,31 +135,4 @@ class phpbb_test_case extends TestCase
 			parent::assertFileNotExists($filename, $message);
 		}
 	}
-
-	/**
-	 * Passing E_USER_ERROR to trigger_error() is deprecated as of PHP 8.4, so it causes E_DEPRECATED
-	 * Use trigger_error() callback function to workaround this by handling E_USER_ERROR and suppressing E_DEPRECATED
-	 * "Passing E_USER_ERROR to trigger_error() is deprecated since 8.4, throw an exception or call exit with a string message instead"
-	 * 
-	 */
-	public function trigger_error_callback($errno, $errstr, $errfile, $errline)
-	{
-		// $errstr may need to be escaped
-		$errstr = htmlspecialchars($errstr);
-
-		switch ($errno) {
-			case E_USER_ERROR:
-				echo $errstr;
-				exit();
-			break;
-
-			case E_DEPRECATED:
-				return true;
-			break;
-
-			default:
-				return false;
-			break;
-		}
-	}
 }