diff --git a/mysql-test/r/partition_mgm_err.result b/mysql-test/r/partition_mgm_err.result
index e9086ddcc20..38a69e93536 100644
--- a/mysql-test/r/partition_mgm_err.result
+++ b/mysql-test/r/partition_mgm_err.result
@@ -125,3 +125,16 @@ ALTER TABLE t1 ADD PARTITION (
 PARTITION p5 VALUES LESS THAN (2010),
 PARTITION p6 VALUES LESS THAN MAXVALUE);
 DROP TABLE t1;
+CREATE TABLE t1 (a INT);
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` int(11) default NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+ALTER TABLE t1 PARTITION BY KEY(a) PARTITIONS 2;
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` int(11) default NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin1 PARTITION BY KEY (a) PARTITIONS 2 
+DROP TABLE t1;
diff --git a/mysql-test/t/partition_mgm_err.test b/mysql-test/t/partition_mgm_err.test
index f0f29bbc2d6..4b6b4968bdb 100644
--- a/mysql-test/t/partition_mgm_err.test
+++ b/mysql-test/t/partition_mgm_err.test
@@ -184,3 +184,12 @@ ALTER TABLE t1 ADD PARTITION (
   PARTITION p5 VALUES LESS THAN (2010),
   PARTITION p6 VALUES LESS THAN MAXVALUE);
 DROP TABLE t1;
+
+#
+#BUG 15523 ALTER TABLE ... PARTITION BY does not work
+#
+CREATE TABLE t1 (a INT);
+SHOW CREATE TABLE t1;
+ALTER TABLE t1 PARTITION BY KEY(a) PARTITIONS 2;
+SHOW CREATE TABLE t1;
+DROP TABLE t1;