"1713: Undo log record is too big" for instant ADD COLUMN with long DEFAULT for BLOB

diff --git a/mysql-test/suite/innodb/t/instant_alter.test b/mysql-test/suite/innodb/t/instant_alter.test

index 720e495e3a7..dc7a56fb641 100644

--- a/mysql-test/suite/innodb/t/instant_alter.test

+++ b/mysql-test/suite/innodb/t/instant_alter.test

@@ -338,8 +338,7 @@ ALGORITHM=INSTANT;

 SET foreign_key_checks=1;

 ALTER TABLE t2 COMMENT 'domestic keys only', DROP FOREIGN KEY fk;

 ALTER TABLE t1 DROP FOREIGN KEY t1_ibfk_1;

-ALTER TABLE t1 ADD COLUMN big BLOB NOT NULL

-DEFAULT REPEAT('a', @@GLOBAL.innodb_page_size * .75);

+ALTER TABLE t1 ADD COLUMN big BLOB NOT NULL DEFAULT REPEAT('a', 65535);

 CHECK TABLE t2, t1;

 DROP TABLE t2, t1;

CURRENT_TEST: innodb.instant_alter

mysqltest: At line 341: query 'ALTER TABLE t1 ADD COLUMN big BLOB NOT NULL DEFAULT REPEAT('a', 65535)' failed: 1713: Undo log record is too big