diff --git a/lib/Cake/Model/Datasource/Database/Mysql.php b/lib/Cake/Model/Datasource/Database/Mysql.php
index b94ece767d4..70c51366c3f 100644
--- a/lib/Cake/Model/Datasource/Database/Mysql.php
+++ b/lib/Cake/Model/Datasource/Database/Mysql.php
@@ -682,7 +682,7 @@ public function getSchemaName() {
  * @return boolean
  */
 	public function supportNestedTransaction() {
-		return version_compare($this->getVersion(), '4.1', '>=');
+		return $this->nestedTransaction && version_compare($this->getVersion(), '4.1', '>=');
 	}
 
 }
diff --git a/lib/Cake/Model/Datasource/Database/Postgres.php b/lib/Cake/Model/Datasource/Database/Postgres.php
index 261a06d6cf0..35f568aad85 100644
--- a/lib/Cake/Model/Datasource/Database/Postgres.php
+++ b/lib/Cake/Model/Datasource/Database/Postgres.php
@@ -901,7 +901,7 @@ public function getSchemaName() {
  * @return boolean
  */
 	public function supportNestedTransaction() {
-		return version_compare($this->getVersion(), '8.0', '>=');
+		return $this->nestedTransaction && version_compare($this->getVersion(), '8.0', '>=');
 	}
 
 }
diff --git a/lib/Cake/Model/Datasource/Database/Sqlite.php b/lib/Cake/Model/Datasource/Database/Sqlite.php
index cbc2caeaac7..419709892d8 100644
--- a/lib/Cake/Model/Datasource/Database/Sqlite.php
+++ b/lib/Cake/Model/Datasource/Database/Sqlite.php
@@ -565,7 +565,7 @@ public function getSchemaName() {
  * @return boolean
  */
 	public function supportNestedTransaction() {
-		return version_compare($this->getVersion(), '3.6.8', '>=');
+		return $this->nestedTransaction && version_compare($this->getVersion(), '3.6.8', '>=');
 	}
 
 }
diff --git a/lib/Cake/Model/Datasource/DboSource.php b/lib/Cake/Model/Datasource/DboSource.php
index 6c7f37a4742..a37709df9d8 100644
--- a/lib/Cake/Model/Datasource/DboSource.php
+++ b/lib/Cake/Model/Datasource/DboSource.php
@@ -69,6 +69,15 @@ class DboSource extends DataSource {
  */
 	public $cacheMethods = true;
 
+/**
+ * Flag to support nested transactions. If it is set to false, you will be able to use
+ * the transaction methods (begin/commit/rollback), but just the global transaction will
+ * be executed.
+ *
+ * @var boolean
+ */
+	public $nestedTransaction = true;
+
 /**
  * Print full query debug info?
  *
diff --git a/lib/Cake/Test/Case/Model/Datasource/DboSourceTest.php b/lib/Cake/Test/Case/Model/Datasource/DboSourceTest.php
index 5a2cd8549df..647c373c40d 100644
--- a/lib/Cake/Test/Case/Model/Datasource/DboSourceTest.php
+++ b/lib/Cake/Test/Case/Model/Datasource/DboSourceTest.php
@@ -54,7 +54,7 @@ public function setConnection($conn) {
 	}
 
 	public function supportNestedTransaction() {
-		return self::$nested;
+		return $this->nestedTransaction && self::$nested;
 	}
 
 }
@@ -879,6 +879,30 @@ public function testTransactionNested() {
  * @return void
  */
 	public function testTransactionNestedWithoutSupport() {
+		$conn = $this->getMock('MockPDO');
+		$db = new DboTestSource();
+		$db->setConnection($conn);
+		$db->nestedTransaction = false;
+		DboTestSource::$nested = true;
+
+		$conn->expects($this->once())->method('beginTransaction')->will($this->returnValue(true));
+		$conn->expects($this->never())->method('exec');
+		$conn->expects($this->once())->method('commit')->will($this->returnValue(true));
+
+		$db->begin();
+		$db->begin();
+		$db->commit();
+		$db->begin();
+		$db->rollback();
+		$db->commit();
+	}
+
+/**
+ * Test nested transaction disabled
+ *
+ * @return void
+ */
+	public function testTransactionNestedDisabled() {
 		$conn = $this->getMock('MockPDO');
 		$db = new DboTestSource();
 		$db->setConnection($conn);