diff --git a/lib/Cake/Test/Case/TestSuite/CakeTestCaseTest.php b/lib/Cake/Test/Case/TestSuite/CakeTestCaseTest.php
index 3dfc66926..16e70f777 100644
--- a/lib/Cake/Test/Case/TestSuite/CakeTestCaseTest.php
+++ b/lib/Cake/Test/Case/TestSuite/CakeTestCaseTest.php
@@ -17,9 +17,25 @@
  * @since         CakePHP v 1.2.0.4487
  * @license       http://www.opensource.org/licenses/mit-license.php MIT License
  */
-
+App::uses('CakePlugin', 'Core');
 App::uses('Controller', 'Controller');
 App::uses('CakeHtmlReporter', 'TestSuite/Reporter');
+App::uses('Model', 'Model');
+
+/**
+ * Secondary Post stub class.
+ */
+class SecondaryPost extends Model {
+/**
+ * @var string
+ */
+	public $useTable = 'posts';
+
+/**
+ * @var string
+ */
+	public $useDbConfig = 'secondary';
+}
 
 /**
  * CakeTestCaseTest
@@ -391,9 +407,9 @@ class CakeTestCaseTest extends CakeTestCase {
  */
 	public function testGetMockForModel() {
 		App::build(array(
-				'Model' => array(
-					CAKE . 'Test' . DS . 'test_app' . DS . 'Model' . DS
-				)
+			'Model' => array(
+				CAKE . 'Test' . DS . 'test_app' . DS . 'Model' . DS
+			)
 		), App::RESET);
 		$Post = $this->getMockForModel('Post');
 
@@ -408,6 +424,27 @@ class CakeTestCaseTest extends CakeTestCase {
 		$this->assertInternalType('array', $Post->find('all'));
 	}
 
+/**
+ * Test getMockForModel on secondary datasources.
+ *
+ * @return void
+ */
+	public function testGetMockForModelSecondaryDatasource() {
+		App::build(array(
+			'Plugin' => array(CAKE . 'Test' . DS . 'test_app' . DS . 'Plugin' . DS),
+			'Model/Datasource/Database' => array(
+				CAKE . 'Test' . DS . 'test_app' . DS . 'Model' . DS . 'Datasource' . DS . 'Database' . DS
+			)
+		), App::RESET);
+		CakePlugin::load('TestPlugin');
+		ConnectionManager::create('test_secondary', [
+			'datasource' => 'Database/TestLocalDriver'
+		]);
+		$post = $this->getMockForModel('SecondaryPost', array('save'));
+		$this->assertEquals('test_secondary', $post->useDbConfig);
+		ConnectionManager::drop('test_secondary');
+	}
+
 /**
  * test getMockForModel() with plugin models
  *
@@ -415,9 +452,9 @@ class CakeTestCaseTest extends CakeTestCase {
  */
 	public function testGetMockForModelWithPlugin() {
 		App::build(array(
-				'Plugin' => array(
-					CAKE . 'Test' . DS . 'test_app' . DS . 'Plugin' . DS
-				)
+			'Plugin' => array(
+				CAKE . 'Test' . DS . 'test_app' . DS . 'Plugin' . DS
+			)
 		), App::RESET);
 		CakePlugin::load('TestPlugin');
 		$this->getMockForModel('TestPlugin.TestPluginAppModel');
@@ -425,6 +462,7 @@ class CakeTestCaseTest extends CakeTestCase {
 
 		$result = ClassRegistry::init('TestPlugin.TestPluginComment');
 		$this->assertInstanceOf('TestPluginComment', $result);
+		$this->assertEquals('test', $result->useDbConfig);
 
 		$TestPluginComment = $this->getMockForModel('TestPlugin.TestPluginComment', array('save'));
 
@@ -445,7 +483,7 @@ class CakeTestCaseTest extends CakeTestCase {
  * @return void
  */
 	public function testGetMockForModelModel() {
-		$Mock = $this->getMockForModel('Model', array('save'), array('name' => 'Comment'));
+		$Mock = $this->getMockForModel('Model', array('save', 'setDataSource'), array('name' => 'Comment'));
 
 		$result = ClassRegistry::init('Comment');
 		$this->assertInstanceOf('Model', $result);
diff --git a/lib/Cake/TestSuite/CakeTestCase.php b/lib/Cake/TestSuite/CakeTestCase.php
index 3734e2595..6e76049da 100644
--- a/lib/Cake/TestSuite/CakeTestCase.php
+++ b/lib/Cake/TestSuite/CakeTestCase.php
@@ -722,13 +722,23 @@ abstract class CakeTestCase extends PHPUnit_Framework_TestCase {
 
 		list($plugin, $name) = pluginSplit($model, true);
 		App::uses($name, $plugin . 'Model');
+
 		$config = array_merge((array)$config, array('name' => $name));
+		unset($config['ds']);
 
 		if (!class_exists($name)) {
 			throw new MissingModelException(array($model));
 		}
-
 		$mock = $this->getMock($name, $methods, array($config));
+
+		$availableDs = array_keys(ConnectionManager::enumConnectionObjects());
+		if ($mock->useDbConfig === 'default') {
+			$mock->setDataSource('test');
+		}
+		if ($mock->useDbConfig !== 'test' && in_array('test_' . $mock->useDbConfig, $availableDs)) {
+			$mock->setDataSource('test_' . $mock->useDbConfig);
+		}
+
 		ClassRegistry::removeObject($name);
 		ClassRegistry::addObject($name, $mock);
 		return $mock;