diff --git a/lib/Db/AbstractDriver.php b/lib/Db/AbstractDriver.php
index fc2ac4c..3d46199 100644
--- a/lib/Db/AbstractDriver.php
+++ b/lib/Db/AbstractDriver.php
@@ -15,16 +15,14 @@ abstract class AbstractDriver implements Driver {
     }
 
     public function begin(): bool {
-        $this->exec("SAVEPOINT newssync_".($this->transDepth));
-        $this->transDepth += 1;
+        $this->exec("SAVEPOINT newssync_".(++$this->transDepth));
         return true;
     }
 
     public function commit(bool $all = false): bool {
         if($this->transDepth==0) return false;
         if(!$all) {
-            $this->exec("RELEASE SAVEPOINT newssync_".($this->transDepth - 1));
-            $this->transDepth -= 1;
+            $this->exec("RELEASE SAVEPOINT newssync_".($this->transDepth--));
         } else {
             $this->exec("COMMIT TRANSACTION");
             $this->transDepth = 0;
@@ -35,11 +33,9 @@ abstract class AbstractDriver implements Driver {
     public function rollback(bool $all = false): bool {
         if($this->transDepth==0) return false;
         if(!$all) {
-            $this->exec("ROLLBACK TRANSACTION TO SAVEPOINT newssync_".($this->transDepth - 1));
+            $this->exec("ROLLBACK TRANSACTION TO SAVEPOINT newssync_".($this->transDepth));
             // rollback to savepoint does not collpase the savepoint
-            $this->commit();
-            $this->transDepth -= 1;
-            if($this->transDepth==0) $this->exec("ROLLBACK TRANSACTION");
+            $this->exec("RELEASE SAVEPOINT newssync_".($this->transDepth--));
         } else {
             $this->exec("ROLLBACK TRANSACTION");
             $this->transDepth = 0;
diff --git a/tests/Db/SQLite3/TestDbDriverSQLite3.php b/tests/Db/SQLite3/TestDbDriverSQLite3.php
index 1ea3e13..2cbbe11 100644
--- a/tests/Db/SQLite3/TestDbDriverSQLite3.php
+++ b/tests/Db/SQLite3/TestDbDriverSQLite3.php
@@ -92,4 +92,158 @@ class TestDbDriverSQLite3 extends \PHPUnit\Framework\TestCase {
 		$this->assertException("engineErrorGeneral", "Db");
 		$s = $this->drv->prepare("This is an invalid query", "int", "int");
 	}
+
+	function testBeginTransaction() {
+		$select = "SELECT count(*) FROM test";
+		$insert = "INSERT INTO test(id) values(null)";
+		$ch = new \SQLite3($this->data->conf->dbSQLite3File);
+		$this->drv->exec("CREATE TABLE test(id integer primary key)");
+		$this->drv->begin();
+		$this->drv->query($insert);
+		$this->assertEquals(1, $this->drv->query($select)->getValue());
+		$this->assertEquals(0, $ch->querySingle($select));
+		$this->drv->query($insert);
+		$this->assertEquals(2, $this->drv->query($select)->getValue());
+		$this->assertEquals(0, $ch->querySingle($select));
+	}
+
+	function testCommitTransaction() {
+		$select = "SELECT count(*) FROM test";
+		$insert = "INSERT INTO test(id) values(null)";
+		$ch = new \SQLite3($this->data->conf->dbSQLite3File);
+		$this->drv->exec("CREATE TABLE test(id integer primary key)");
+		$this->drv->begin();
+		$this->drv->query($insert);
+		$this->assertEquals(1, $this->drv->query($select)->getValue());
+		$this->assertEquals(0, $ch->querySingle($select));
+		$this->drv->commit();
+		$this->assertEquals(1, $this->drv->query($select)->getValue());
+		$this->assertEquals(1, $ch->querySingle($select));
+	}
+
+	function testRollbackTransaction() {
+		$select = "SELECT count(*) FROM test";
+		$insert = "INSERT INTO test(id) values(null)";
+		$ch = new \SQLite3($this->data->conf->dbSQLite3File);
+		$this->drv->exec("CREATE TABLE test(id integer primary key)");
+		$this->drv->begin();
+		$this->drv->query($insert);
+		$this->assertEquals(1, $this->drv->query($select)->getValue());
+		$this->assertEquals(0, $ch->querySingle($select));
+		$this->drv->rollback();
+		$this->assertEquals(0, $this->drv->query($select)->getValue());
+		$this->assertEquals(0, $ch->querySingle($select));
+	}
+
+	function testBeginChainedTransactions() {
+		$select = "SELECT count(*) FROM test";
+		$insert = "INSERT INTO test(id) values(null)";
+		$ch = new \SQLite3($this->data->conf->dbSQLite3File);
+		$this->drv->exec("CREATE TABLE test(id integer primary key)");
+		$this->drv->begin();
+		$this->drv->query($insert);
+		$this->assertEquals(1, $this->drv->query($select)->getValue());
+		$this->assertEquals(0, $ch->querySingle($select));
+		$this->drv->begin();
+		$this->drv->query($insert);
+		$this->assertEquals(2, $this->drv->query($select)->getValue());
+		$this->assertEquals(0, $ch->querySingle($select));
+	}
+
+	function testCommitChainedTransactions() {
+		$select = "SELECT count(*) FROM test";
+		$insert = "INSERT INTO test(id) values(null)";
+		$ch = new \SQLite3($this->data->conf->dbSQLite3File);
+		$this->drv->exec("CREATE TABLE test(id integer primary key)");
+		$this->drv->begin();
+		$this->drv->query($insert);
+		$this->assertEquals(1, $this->drv->query($select)->getValue());
+		$this->assertEquals(0, $ch->querySingle($select));
+		$this->drv->begin();
+		$this->drv->query($insert);
+		$this->assertEquals(2, $this->drv->query($select)->getValue());
+		$this->assertEquals(0, $ch->querySingle($select));
+		$this->drv->commit();
+		$this->assertEquals(0, $ch->querySingle($select));
+		$this->drv->commit();
+		$this->assertEquals(2, $ch->querySingle($select));
+	}
+
+	function testRollbackChainedTransactions() {
+		$select = "SELECT count(*) FROM test";
+		$insert = "INSERT INTO test(id) values(null)";
+		$ch = new \SQLite3($this->data->conf->dbSQLite3File);
+		$this->drv->exec("CREATE TABLE test(id integer primary key)");
+		$this->drv->begin();
+		$this->drv->query($insert);
+		$this->assertEquals(1, $this->drv->query($select)->getValue());
+		$this->assertEquals(0, $ch->querySingle($select));
+		$this->drv->begin();
+		$this->drv->query($insert);
+		$this->assertEquals(2, $this->drv->query($select)->getValue());
+		$this->assertEquals(0, $ch->querySingle($select));
+		$this->drv->rollback();
+		$this->assertEquals(1, $this->drv->query($select)->getValue());
+		$this->assertEquals(0, $ch->querySingle($select));
+		$this->drv->rollback();
+		$this->assertEquals(0, $this->drv->query($select)->getValue());
+		$this->assertEquals(0, $ch->querySingle($select));
+	}
+
+	function testPartiallyRollbackChainedTransactions() {
+		$select = "SELECT count(*) FROM test";
+		$insert = "INSERT INTO test(id) values(null)";
+		$ch = new \SQLite3($this->data->conf->dbSQLite3File);
+		$this->drv->exec("CREATE TABLE test(id integer primary key)");
+		$this->drv->begin();
+		$this->drv->query($insert);
+		$this->assertEquals(1, $this->drv->query($select)->getValue());
+		$this->assertEquals(0, $ch->querySingle($select));
+		$this->drv->begin();
+		$this->drv->query($insert);
+		$this->assertEquals(2, $this->drv->query($select)->getValue());
+		$this->assertEquals(0, $ch->querySingle($select));
+		$this->drv->rollback();
+		$this->assertEquals(1, $this->drv->query($select)->getValue());
+		$this->assertEquals(0, $ch->querySingle($select));
+		$this->drv->commit();
+		$this->assertEquals(1, $this->drv->query($select)->getValue());
+		$this->assertEquals(1, $ch->querySingle($select));
+	}
+
+	function testFullyRollbackChainedTransactions() {
+		$select = "SELECT count(*) FROM test";
+		$insert = "INSERT INTO test(id) values(null)";
+		$ch = new \SQLite3($this->data->conf->dbSQLite3File);
+		$this->drv->exec("CREATE TABLE test(id integer primary key)");
+		$this->drv->begin();
+		$this->drv->query($insert);
+		$this->assertEquals(1, $this->drv->query($select)->getValue());
+		$this->assertEquals(0, $ch->querySingle($select));
+		$this->drv->begin();
+		$this->drv->query($insert);
+		$this->assertEquals(2, $this->drv->query($select)->getValue());
+		$this->assertEquals(0, $ch->querySingle($select));
+		$this->drv->rollback(true);
+		$this->assertEquals(0, $this->drv->query($select)->getValue());
+		$this->assertEquals(0, $ch->querySingle($select));
+	}
+
+	function testFullyCommitChainedTransactions() {
+		$select = "SELECT count(*) FROM test";
+		$insert = "INSERT INTO test(id) values(null)";
+		$ch = new \SQLite3($this->data->conf->dbSQLite3File);
+		$this->drv->exec("CREATE TABLE test(id integer primary key)");
+		$this->drv->begin();
+		$this->drv->query($insert);
+		$this->assertEquals(1, $this->drv->query($select)->getValue());
+		$this->assertEquals(0, $ch->querySingle($select));
+		$this->drv->begin();
+		$this->drv->query($insert);
+		$this->assertEquals(2, $this->drv->query($select)->getValue());
+		$this->assertEquals(0, $ch->querySingle($select));
+		$this->drv->commit(true);
+		$this->assertEquals(2, $this->drv->query($select)->getValue());
+		$this->assertEquals(2, $ch->querySingle($select));
+	}
 }
\ No newline at end of file