diff --git a/tests/core/parent.php b/tests/core/parent.php
index 908680d..f664af2 100644
--- a/tests/core/parent.php
+++ b/tests/core/parent.php
@@ -48,60 +48,6 @@ abstract class DBTest extends UnitTestCase {
 		$res = $this->db->beginTransaction();
 		$this->assertTrue($res);
 	}
-
-	function TestPreparedStatements()
-	{
-		if (empty($this->db))  return;
-
-		$sql = <<<SQL
-			INSERT INTO "create_test" ("id", "key", "val")
-			VALUES (?,?,?)
-SQL;
-		$statement = $this->db->prepare_query($sql, array(1,"boogers", "Gross"));
-
-		$statement->execute();
-
-	}
-
-	function TestPrepareExecute()
-	{
-		if (empty($this->db))  return;
-
-		$sql = <<<SQL
-			INSERT INTO "create_test" ("id", "key", "val")
-			VALUES (?,?,?)
-SQL;
-		$this->db->prepare_execute($sql, array(
-			2, "works", 'also?'
-		));
-
-	}
-
-	function TestCommitTransaction()
-	{
-		if (empty($this->db))  return;
-
-		$res = $this->db->beginTransaction();
-
-		$sql = 'INSERT INTO "create_test" ("id", "key", "val") VALUES (10, 12, 14)';
-		$this->db->query($sql);
-
-		$res = $this->db->commit();
-		$this->assertTrue($res);
-	}
-
-	function TestRollbackTransaction()
-	{
-		if (empty($this->db))  return;
-
-		$res = $this->db->beginTransaction();
-
-		$sql = 'INSERT INTO "create_test" ("id", "key", "val") VALUES (182, 96, 43)';
-		$this->db->query($sql);
-
-		$res = $this->db->rollback();
-		$this->assertTrue($res);
-	}
 }
 
 // --------------------------------------------------------------------------
@@ -236,6 +182,7 @@ abstract class QBTest extends UnitTestCase {
 			->where('id >', 0)
 			->where('id <', 9000)
 			->group_by('k')
+			->group_by('id')
 			->group_by('val')
 			->order_by('id', 'DESC')
 			->order_by('k', 'ASC')
diff --git a/tests/databases/mysql.php b/tests/databases/mysql.php
index 9cb249b..1eb5a5a 100644
--- a/tests/databases/mysql.php
+++ b/tests/databases/mysql.php
@@ -85,6 +85,69 @@ class MySQLTest extends DBTest {
 
 	}
 	
+	function TestTruncate()
+	{
+		$this->db->truncate('create_test');
+		$this->db->truncate('create_join');
+		
+		$ct_query = $this->db->query('SELECT * FROM create_test');
+		$cj_query = $this->db->query('SELECT * FROM create_join');
+	}
+	
+	function TestPreparedStatements()
+	{
+		if (empty($this->db))  return;
+
+		$sql = <<<SQL
+			INSERT INTO `create_test` (`id`, `key`, `val`)
+			VALUES (?,?,?)
+SQL;
+		$statement = $this->db->prepare_query($sql, array(1,"boogers", "Gross"));
+
+		$statement->execute();
+
+	}
+
+	function TestPrepareExecute()
+	{
+		if (empty($this->db))  return;
+
+		$sql = <<<SQL
+			INSERT INTO `create_test` (`id`, `key`, `val`)
+			VALUES (?,?,?)
+SQL;
+		$this->db->prepare_execute($sql, array(
+			2, "works", 'also?'
+		));
+
+	}
+
+	function TestCommitTransaction()
+	{
+		if (empty($this->db))  return;
+
+		$res = $this->db->beginTransaction();
+
+		$sql = 'INSERT INTO `create_test` (`id`, `key`, `val`) VALUES (10, 12, 14)';
+		$this->db->query($sql);
+
+		$res = $this->db->commit();
+		$this->assertTrue($res);
+	}
+
+	function TestRollbackTransaction()
+	{
+		if (empty($this->db))  return;
+
+		$res = $this->db->beginTransaction();
+
+		$sql = 'INSERT INTO `create_test` (`id`, `key`, `val`) VALUES (182, 96, 43)';
+		$this->db->query($sql);
+
+		$res = $this->db->rollback();
+		$this->assertTrue($res);
+	}
+	
 	function TestGetSchemas()
 	{
 		$this->assertFalse($this->db->get_schemas());
diff --git a/tests/databases/pgsql.php b/tests/databases/pgsql.php
index dabd0e8..470c34a 100644
--- a/tests/databases/pgsql.php
+++ b/tests/databases/pgsql.php
@@ -102,6 +102,69 @@ class PgTest extends DBTest {
 
 	}
 	
+	function TestTruncate()
+	{
+		$this->db->truncate('create_test');
+		$this->db->truncate('create_join');
+		
+		$ct_query = $this->db->query('SELECT * FROM create_test');
+		$cj_query = $this->db->query('SELECT * FROM create_join');
+	}
+	
+	function TestPreparedStatements()
+	{
+		if (empty($this->db))  return;
+
+		$sql = <<<SQL
+			INSERT INTO "create_test" ("id", "key", "val")
+			VALUES (?,?,?)
+SQL;
+		$statement = $this->db->prepare_query($sql, array(1,"boogers", "Gross"));
+
+		$statement->execute();
+
+	}
+
+	function TestPrepareExecute()
+	{
+		if (empty($this->db))  return;
+
+		$sql = <<<SQL
+			INSERT INTO "create_test" ("id", "key", "val")
+			VALUES (?,?,?)
+SQL;
+		$this->db->prepare_execute($sql, array(
+			2, "works", 'also?'
+		));
+
+	}
+
+	function TestCommitTransaction()
+	{
+		if (empty($this->db))  return;
+
+		$res = $this->db->beginTransaction();
+
+		$sql = 'INSERT INTO "create_test" ("id", "key", "val") VALUES (10, 12, 14)';
+		$this->db->query($sql);
+
+		$res = $this->db->commit();
+		$this->assertTrue($res);
+	}
+
+	function TestRollbackTransaction()
+	{
+		if (empty($this->db))  return;
+
+		$res = $this->db->beginTransaction();
+
+		$sql = 'INSERT INTO "create_test" ("id", "key", "val") VALUES (182, 96, 43)';
+		$this->db->query($sql);
+
+		$res = $this->db->rollback();
+		$this->assertTrue($res);
+	}
+	
 	function TestGetSchemas()
 	{
 		$this->assertTrue(is_array($this->db->get_schemas()));
diff --git a/tests/test_dbs/FB_TEST_DB.FDB b/tests/test_dbs/FB_TEST_DB.FDB
index d78e6c1..2cc7d47 100755
Binary files a/tests/test_dbs/FB_TEST_DB.FDB and b/tests/test_dbs/FB_TEST_DB.FDB differ