Hello, I am trying to write a unit test for a dependency injection situation and I have a reproducible example at the end. I am getting this error: 1) testFake::test_fake Argument 1 passed to screenFake::__construct() must be an instance of databaseInterfaseFake, instance of Mock_databaseInterfaceFake_b36397fd given, called in fakeTest.php on line 25 and de... I have run across similar issues on the web, but they all point me to not mocking the correct object, which I do not think is the case here. This is probably very obvious but I am brand new in using mocks and stubs so any help appreciated. Thanks in advance, <?php class databaseInterfaceFake { private $a; function __construct() { $a="a"; } } class screenFake { private $db; function __construct(databaseInterfaseFake $dbFake) { $db = $dbFake; } function m() { return TRUE; } } class testFake extends PHPUnit_Framework_TestCase { public function test_fake() { $db = $this->getMock('databaseInterfaceFake'); $screen = new screenFake($db); $this->assertTrue($screen->m()); } } ?>