diff --git a/ext/pdo/tests/pdo_009.phpt b/ext/pdo/tests/pdo_009.phpt
index 5194ff4e966..ded40c8be96 100644
--- a/ext/pdo/tests/pdo_009.phpt
+++ b/ext/pdo/tests/pdo_009.phpt
@@ -9,7 +9,7 @@ if (false == getenv('REDIR_TEST_DIR')) print 'skip no driver'; ?>
 require getenv('REDIR_TEST_DIR') . 'pdo_test.inc';
 $db = PDOTest::factory();
 
-$db->exec('CREATE TABLE classtypes(id int NOT NULL PRIMARY KEY, name VARCHAR(10) UNIQUE)');
+$db->exec('CREATE TABLE classtypes(id int NOT NULL PRIMARY KEY, name VARCHAR(10) NOT NULL UNIQUE)');
 $db->exec('INSERT INTO classtypes VALUES(0, \'stdClass\')'); 
 $db->exec('INSERT INTO classtypes VALUES(1, \'Test1\')'); 
 $db->exec('INSERT INTO classtypes VALUES(2, \'Test2\')'); 
diff --git a/ext/pdo/tests/pdo_010.phpt b/ext/pdo/tests/pdo_010.phpt
index 8898f067027..9e8cecb576e 100644
--- a/ext/pdo/tests/pdo_010.phpt
+++ b/ext/pdo/tests/pdo_010.phpt
@@ -9,7 +9,7 @@ if (false == getenv('REDIR_TEST_DIR')) print 'skip no driver'; ?>
 require getenv('REDIR_TEST_DIR') . 'pdo_test.inc';
 $db = PDOTest::factory();
 
-$db->exec('CREATE TABLE classtypes(id int NOT NULL PRIMARY KEY, name VARCHAR(10) UNIQUE)');
+$db->exec('CREATE TABLE classtypes(id int NOT NULL PRIMARY KEY, name VARCHAR(10) NOT NULL UNIQUE)');
 $db->exec('INSERT INTO classtypes VALUES(0, \'stdClass\')'); 
 $db->exec('INSERT INTO classtypes VALUES(1, \'Test1\')'); 
 $db->exec('INSERT INTO classtypes VALUES(2, \'Test2\')'); 
diff --git a/ext/pdo/tests/pdo_018.phpt b/ext/pdo/tests/pdo_018.phpt
index a0bfdf0f990..6ed6295ee23 100644
--- a/ext/pdo/tests/pdo_018.phpt
+++ b/ext/pdo/tests/pdo_018.phpt
@@ -63,7 +63,7 @@ class TestLeaf extends TestDerived
 {
 }
 
-$db->exec('CREATE TABLE classtypes(id int NOT NULL PRIMARY KEY, name VARCHAR(20) UNIQUE)');
+$db->exec('CREATE TABLE classtypes(id int NOT NULL PRIMARY KEY, name VARCHAR(20) NOT NULL UNIQUE)');
 $db->exec('INSERT INTO classtypes VALUES(0, \'stdClass\')'); 
 $db->exec('INSERT INTO classtypes VALUES(1, \'TestBase\')'); 
 $db->exec('INSERT INTO classtypes VALUES(2, \'TestDerived\')');