diff --git a/mysql-test/t/ctype_uca_th.test b/mysql-test/include/ctype_uca_w2.inc
similarity index 61%
rename from mysql-test/t/ctype_uca_th.test
rename to mysql-test/include/ctype_uca_w2.inc
index ac344fc6fad..d3074b82510 100644
--- a/mysql-test/t/ctype_uca_th.test
+++ b/mysql-test/include/ctype_uca_w2.inc
@@ -1,16 +1,19 @@
+--echo #
+--echo # Start of ctype_uca_w2.inc
+--echo #
+
+SELECT @@collation_connection;
 
 SELECT ID, SORTLEN, COLLATION_NAME, CHARACTER_SET_NAME
 FROM INFORMATION_SCHEMA.COLLATIONS
-WHERE COLLATION_NAME LIKE 'utf8_thai_520_w2';
-
-SET NAMES utf8;
-
+WHERE COLLATION_NAME LIKE @@collation_connection;
 
 --echo #
 --echo # Testing strnxfrm
 --echo #
 
-CREATE TABLE t1 (a VARCHAR(3) CHARACTER SET utf8 COLLATE utf8_thai_520_w2);
+CREATE TABLE t1 AS SELECT SPACE(3) AS a LIMIT 0;
+SHOW CREATE TABLE t1;
 INSERT INTO t1 VALUES (SPACE(0)),(SPACE(1)),(SPACE(2));
 SELECT HEX(a), HEX(WEIGHT_STRING(a AS CHAR(8))) FROM t1;
 SELECT HEX(a), HEX(WEIGHT_STRING(a AS CHAR(4))) FROM t1;
@@ -19,19 +22,31 @@ SELECT HEX(a), HEX(WEIGHT_STRING(a AS CHAR(4) LEVEL 2)) FROM t1;
 SELECT HEX(a), HEX(WEIGHT_STRING(a AS CHAR(4) LEVEL 3)) FROM t1;
 DROP TABLE t1;
 
-CREATE TABLE t1 (a CHAR(10) CHARACTER SET utf8 COLLATE utf8_thai_520_w2);
+CREATE TABLE t1 AS SELECT SPACE(10) AS a LIMIT 0;
+SHOW CREATE TABLE t1;
 INSERT INTO t1 VALUES ('A'),('À'),('Á'),('Â'),('Ã'),('Ä'),('Å');
 SELECT a, HEX(WEIGHT_STRING(a LEVEL 2)) FROM t1 ORDER BY a;
 SELECT a, HEX(WEIGHT_STRING(a LEVEL 2)) FROM t1 ORDER BY a DESC;
 
-ALTER TABLE t1 MODIFY a VARCHAR(10) CHARACTER SET utf8 COLLATE utf8_thai_520_w2;
+SET @stmt= CONCAT('ALTER TABLE t1 MODIFY a CHAR(10)',
+                  ' CHARACTER SET ',  @@character_set_connection,
+                  ' COLLATE ',  @@collation_connection);
+PREPARE stmt FROM @stmt;
+EXECUTE stmt;
+DEALLOCATE PREPARE stmt;
+SHOW CREATE TABLE t1;
 SELECT a, HEX(WEIGHT_STRING(a LEVEL 2)) FROM t1 ORDER BY a;
 SELECT a, HEX(WEIGHT_STRING(a LEVEL 2)) FROM t1 ORDER BY a DESC;
 DROP TABLE t1;
 
-CREATE TABLE t1 (a VARCHAR(10) CHARACTER SET utf8 COLLATE utf8_thai_520_w2);
+CREATE TABLE t1 AS SELECT SPACE(10) AS a LIMIT 0;
+SHOW CREATE TABLE t1;
 INSERT INTO t1 VALUES ('cota'),('cote'),('cotz');
 INSERT INTO t1 VALUES ('coté'),('côte'),('côté'),('cotë'),('côtë');
 SELECT * FROM t1 ORDER BY a;
 SELECT * FROM t1 ORDER BY a DESC;
 DROP TABLE t1;
+
+--echo #
+--echo # End of ctype_uca_w2.inc
+--echo #
diff --git a/mysql-test/r/ctype_uca.result b/mysql-test/r/ctype_uca.result
index 03d20b2651d..07a281a11e3 100644
--- a/mysql-test/r/ctype_uca.result
+++ b/mysql-test/r/ctype_uca.result
@@ -13979,7 +13979,141 @@ SELECT * FROM t1 WHERE a='a' AND a=_utf8'a';
 a
 a
 DROP TABLE t1;
-SET NAMES utf8;
+SET NAMES utf8 COLLATE utf8_thai_520_w2;
+#
+# Start of ctype_uca_w2.inc
+#
+SELECT @@collation_connection;
+@@collation_connection
+utf8_thai_520_w2
+SELECT ID, SORTLEN, COLLATION_NAME, CHARACTER_SET_NAME
+FROM INFORMATION_SCHEMA.COLLATIONS
+WHERE COLLATION_NAME LIKE @@collation_connection;
+ID	SORTLEN	COLLATION_NAME	CHARACTER_SET_NAME
+578	4	utf8_thai_520_w2	utf8
+#
+# Testing strnxfrm
+#
+CREATE TABLE t1 AS SELECT SPACE(3) AS a LIMIT 0;
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` varchar(3) CHARACTER SET utf8 COLLATE utf8_thai_520_w2 NOT NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+INSERT INTO t1 VALUES (SPACE(0)),(SPACE(1)),(SPACE(2));
+SELECT HEX(a), HEX(WEIGHT_STRING(a AS CHAR(8))) FROM t1;
+HEX(a)	HEX(WEIGHT_STRING(a AS CHAR(8)))
+	020A020A020A020A020A020A020A020A00200020002000200020002000200020
+20	020A020A020A020A020A020A020A020A00200020002000200020002000200020
+2020	020A020A020A020A020A020A020A020A00200020002000200020002000200020
+SELECT HEX(a), HEX(WEIGHT_STRING(a AS CHAR(4))) FROM t1;
+HEX(a)	HEX(WEIGHT_STRING(a AS CHAR(4)))
+	020A020A020A020A0020002000200020
+20	020A020A020A020A0020002000200020
+2020	020A020A020A020A0020002000200020
+SELECT HEX(a), HEX(WEIGHT_STRING(a AS CHAR(4) LEVEL 1)) FROM t1;
+HEX(a)	HEX(WEIGHT_STRING(a AS CHAR(4) LEVEL 1))
+	020A020A020A020A
+20	020A020A020A020A
+2020	020A020A020A020A
+SELECT HEX(a), HEX(WEIGHT_STRING(a AS CHAR(4) LEVEL 2)) FROM t1;
+HEX(a)	HEX(WEIGHT_STRING(a AS CHAR(4) LEVEL 2))
+	0020002000200020
+20	0020002000200020
+2020	0020002000200020
+SELECT HEX(a), HEX(WEIGHT_STRING(a AS CHAR(4) LEVEL 3)) FROM t1;
+HEX(a)	HEX(WEIGHT_STRING(a AS CHAR(4) LEVEL 3))
+	0020002000200020
+20	0020002000200020
+2020	0020002000200020
+DROP TABLE t1;
+CREATE TABLE t1 AS SELECT SPACE(10) AS a LIMIT 0;
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` varchar(10) CHARACTER SET utf8 COLLATE utf8_thai_520_w2 NOT NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+INSERT INTO t1 VALUES ('A'),('À'),('Á'),('Â'),('Ã'),('Ä'),('Å');
+SELECT a, HEX(WEIGHT_STRING(a LEVEL 2)) FROM t1 ORDER BY a;
+a	HEX(WEIGHT_STRING(a LEVEL 2))
+A	0020
+Á	00200032
+À	00200035
+Â	0020003C
+Å	00200043
+Ä	00200047
+Ã	0020004E
+SELECT a, HEX(WEIGHT_STRING(a LEVEL 2)) FROM t1 ORDER BY a DESC;
+a	HEX(WEIGHT_STRING(a LEVEL 2))
+Ã	0020004E
+Ä	00200047
+Å	00200043
+Â	0020003C
+À	00200035
+Á	00200032
+A	0020
+SET @stmt= CONCAT('ALTER TABLE t1 MODIFY a CHAR(10)',
+' CHARACTER SET ',  @@character_set_connection,
+' COLLATE ',  @@collation_connection);
+PREPARE stmt FROM @stmt;
+EXECUTE stmt;
+DEALLOCATE PREPARE stmt;
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` char(10) CHARACTER SET utf8 COLLATE utf8_thai_520_w2 DEFAULT NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+SELECT a, HEX(WEIGHT_STRING(a LEVEL 2)) FROM t1 ORDER BY a;
+a	HEX(WEIGHT_STRING(a LEVEL 2))
+A	0020
+Á	00200032
+À	00200035
+Â	0020003C
+Å	00200043
+Ä	00200047
+Ã	0020004E
+SELECT a, HEX(WEIGHT_STRING(a LEVEL 2)) FROM t1 ORDER BY a DESC;
+a	HEX(WEIGHT_STRING(a LEVEL 2))
+Ã	0020004E
+Ä	00200047
+Å	00200043
+Â	0020003C
+À	00200035
+Á	00200032
+A	0020
+DROP TABLE t1;
+CREATE TABLE t1 AS SELECT SPACE(10) AS a LIMIT 0;
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` varchar(10) CHARACTER SET utf8 COLLATE utf8_thai_520_w2 NOT NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+INSERT INTO t1 VALUES ('cota'),('cote'),('cotz');
+INSERT INTO t1 VALUES ('coté'),('côte'),('côté'),('cotë'),('côtë');
+SELECT * FROM t1 ORDER BY a;
+a
+cota
+cote
+coté
+cotë
+côte
+côté
+côtë
+cotz
+SELECT * FROM t1 ORDER BY a DESC;
+a
+cotz
+côtë
+côté
+côte
+cotë
+coté
+cote
+cota
+DROP TABLE t1;
+#
+# End of ctype_uca_w2.inc
+#
 #
 # End of MariaDB-10.1 tests
 #
diff --git a/mysql-test/r/ctype_uca_th.result b/mysql-test/r/ctype_uca_th.result
deleted file mode 100644
index f41e0b7cc7c..00000000000
--- a/mysql-test/r/ctype_uca_th.result
+++ /dev/null
@@ -1,101 +0,0 @@
-SELECT ID, SORTLEN, COLLATION_NAME, CHARACTER_SET_NAME
-FROM INFORMATION_SCHEMA.COLLATIONS
-WHERE COLLATION_NAME LIKE 'utf8_thai_520_w2';
-ID	SORTLEN	COLLATION_NAME	CHARACTER_SET_NAME
-578	4	utf8_thai_520_w2	utf8
-SET NAMES utf8;
-#
-# Testing strnxfrm
-#
-CREATE TABLE t1 (a VARCHAR(3) CHARACTER SET utf8 COLLATE utf8_thai_520_w2);
-INSERT INTO t1 VALUES (SPACE(0)),(SPACE(1)),(SPACE(2));
-SELECT HEX(a), HEX(WEIGHT_STRING(a AS CHAR(8))) FROM t1;
-HEX(a)	HEX(WEIGHT_STRING(a AS CHAR(8)))
-	020A020A020A020A020A020A020A020A00200020002000200020002000200020
-20	020A020A020A020A020A020A020A020A00200020002000200020002000200020
-2020	020A020A020A020A020A020A020A020A00200020002000200020002000200020
-SELECT HEX(a), HEX(WEIGHT_STRING(a AS CHAR(4))) FROM t1;
-HEX(a)	HEX(WEIGHT_STRING(a AS CHAR(4)))
-	020A020A020A020A0020002000200020
-20	020A020A020A020A0020002000200020
-2020	020A020A020A020A0020002000200020
-SELECT HEX(a), HEX(WEIGHT_STRING(a AS CHAR(4) LEVEL 1)) FROM t1;
-HEX(a)	HEX(WEIGHT_STRING(a AS CHAR(4) LEVEL 1))
-	020A020A020A020A
-20	020A020A020A020A
-2020	020A020A020A020A
-SELECT HEX(a), HEX(WEIGHT_STRING(a AS CHAR(4) LEVEL 2)) FROM t1;
-HEX(a)	HEX(WEIGHT_STRING(a AS CHAR(4) LEVEL 2))
-	0020002000200020
-20	0020002000200020
-2020	0020002000200020
-SELECT HEX(a), HEX(WEIGHT_STRING(a AS CHAR(4) LEVEL 3)) FROM t1;
-HEX(a)	HEX(WEIGHT_STRING(a AS CHAR(4) LEVEL 3))
-	0020002000200020
-20	0020002000200020
-2020	0020002000200020
-DROP TABLE t1;
-CREATE TABLE t1 (a CHAR(10) CHARACTER SET utf8 COLLATE utf8_thai_520_w2);
-INSERT INTO t1 VALUES ('A'),('À'),('Á'),('Â'),('Ã'),('Ä'),('Å');
-SELECT a, HEX(WEIGHT_STRING(a LEVEL 2)) FROM t1 ORDER BY a;
-a	HEX(WEIGHT_STRING(a LEVEL 2))
-A	0020
-Á	00200032
-À	00200035
-Â	0020003C
-Å	00200043
-Ä	00200047
-Ã	0020004E
-SELECT a, HEX(WEIGHT_STRING(a LEVEL 2)) FROM t1 ORDER BY a DESC;
-a	HEX(WEIGHT_STRING(a LEVEL 2))
-Ã	0020004E
-Ä	00200047
-Å	00200043
-Â	0020003C
-À	00200035
-Á	00200032
-A	0020
-ALTER TABLE t1 MODIFY a VARCHAR(10) CHARACTER SET utf8 COLLATE utf8_thai_520_w2;
-SELECT a, HEX(WEIGHT_STRING(a LEVEL 2)) FROM t1 ORDER BY a;
-a	HEX(WEIGHT_STRING(a LEVEL 2))
-A	0020
-Á	00200032
-À	00200035
-Â	0020003C
-Å	00200043
-Ä	00200047
-Ã	0020004E
-SELECT a, HEX(WEIGHT_STRING(a LEVEL 2)) FROM t1 ORDER BY a DESC;
-a	HEX(WEIGHT_STRING(a LEVEL 2))
-Ã	0020004E
-Ä	00200047
-Å	00200043
-Â	0020003C
-À	00200035
-Á	00200032
-A	0020
-DROP TABLE t1;
-CREATE TABLE t1 (a VARCHAR(10) CHARACTER SET utf8 COLLATE utf8_thai_520_w2);
-INSERT INTO t1 VALUES ('cota'),('cote'),('cotz');
-INSERT INTO t1 VALUES ('coté'),('côte'),('côté'),('cotë'),('côtë');
-SELECT * FROM t1 ORDER BY a;
-a
-cota
-cote
-coté
-cotë
-côte
-côté
-côtë
-cotz
-SELECT * FROM t1 ORDER BY a DESC;
-a
-cotz
-côtë
-côté
-côte
-cotë
-coté
-cote
-cota
-DROP TABLE t1;
diff --git a/mysql-test/t/ctype_uca.test b/mysql-test/t/ctype_uca.test
index 4cc49af1685..c6e2bb11d5c 100644
--- a/mysql-test/t/ctype_uca.test
+++ b/mysql-test/t/ctype_uca.test
@@ -642,7 +642,10 @@ SELECT * FROM t1 WHERE a=_utf8'a';
 # Make sure this does not return "Illegal mix of collations"
 SELECT * FROM t1 WHERE a='a' AND a=_utf8'a';
 DROP TABLE t1;
-SET NAMES utf8;
+
+
+SET NAMES utf8 COLLATE utf8_thai_520_w2;
+--source include/ctype_uca_w2.inc
 
 --echo #
 --echo # End of MariaDB-10.1 tests