diff --git a/mysql-test/main/type_varchar_mysql41.test b/mysql-test/main/type_varchar_mysql41.test

index 5624e9edaaa..dac240f5f11 100644

--- a/mysql-test/main/type_varchar_mysql41.test

+++ b/mysql-test/main/type_varchar_mysql41.test

@@ -47,6 +47,13 @@ copy_file $MYSQL_TEST_DIR/std_data/vchar.frm $MYSQLD_DATADIR/test/t1old.frm;

 TRUNCATE TABLE t1old;

 SHOW CREATE TABLE t1old;

 CALL p1('v');

+INSERT INTO t1old VALUES (REPEAT('foo',10),'bar','abc','text');

+INSERT IGNORE INTO t1old VALUES (REPEAT('snafu  ',5),'afu','def','best');

+--enable_info

+ALTER TABLE t1old MODIFY v VARCHAR(60), ALGORITHM=INSTANT;

+--disable_info

+INSERT INTO t1old VALUES (REPEAT('snafu ',10),'xyz','ghi','rest');

+SELECT * FROM t1old;

 DROP TABLE t1old;

 let $MYSQLD_DATADIR= `SELECT @@datadir`;

@@ -54,6 +61,18 @@ copy_file $MYSQL_TEST_DIR/std_data/bug19371.frm $MYSQLD_DATADIR/test/t1old.frm;

 TRUNCATE TABLE t1old;

 SHOW CREATE TABLE t1old;

 CALL p1('a');

+INSERT INTO t1old VALUES (REPEAT(0xe4,255),REPEAT('snafu',51));

+SET alter_algorithm=inplace;

+--enable_info

+ALTER TABLE t1old MODIFY a VARBINARY(260), CHANGE b c VARCHAR(300);

+SELECT * FROM t1old;

+--error ER_ALTER_OPERATION_NOT_SUPPORTED

+ALTER TABLE t1old MODIFY a VARBINARY(260), CHANGE c b VARCHAR(240);

+ALTER TABLE t1old CHANGE c bin VARCHAR(300);

+SET alter_algorithm=default;

+--disable_info

+INSERT IGNORE INTO t1old VALUES (REPEAT('lots of data',25),REPEAT('cams',75));

+SELECT * FROM t1old;

 DROP TABLE t1old;

 DROP PROCEDURE p1;

ALTER TABLE t1old MODIFY v VARCHAR(60), ALGORITHM=INSTANT;

affected rows: 2

info: Records: 2  Duplicates: 0  Warnings: 0

let $MYSQLD_DATADIR= `SELECT @@datadir`;

copy_file $MYSQL_TEST_DIR/std_data/bug19371.frm $MYSQLD_DATADIR/test/t1old.frm;

CREATE TABLE t1 (a varbinary(255), b varchar(255)) ENGINE=MyISAM;

TRUNCATE TABLE t1old;

SHOW CREATE TABLE t1old;

ALTER TABLE t1old MODIFY a VARCHAR(260) CHARSET utf8, CHANGE b c VARCHAR(300),

ALGORITHM=INSTANT;

ALTER TABLE t1 MODIFY a VARCHAR(260) CHARSET utf8, CHANGE b c VARCHAR(300),

ALGORITHM=INSTANT;

DROP TABLE t1,t1old;