Different method in the old PHPUnit

            $randomizer2 = unserialize(@serialize($randomizer));

        } catch (Throwable $e) {

            self::assertEquals(\Exception::class, get_class($e));

            if (method_exists(__CLASS__, 'assertMatchesRegularExpression')) {

                self::assertMatchesRegularExpression(

                    "/Serialization of '.*@anonymous' is not allowed/",

                    $e->getMessage()

                );

            } else {

                self::assertRegExp(

                    "/Serialization of '.*@anonymous' is not allowed/",

                    $e->getMessage()

                );

            }

            self::assertEquals(0, $e->getCode());

            self::assertNull($e->getPrevious());