Non existent methods cannot be mocked

gistfile1.txt

<?php
class MyMethodOfficiallyDoesNotExist
{
    public function __call($method, $args) {
        return true;
    }
}

class MockingNotExistingMethodsTest extends PHPUnit_Framework_TestCase
{
    public function testANonExistentMethod()
    {
        $original = new MyMethodOfficiallyDoesNotExist();
        $this->assertTrue($original->doesNotExist());

        $mock = $this->getMock('MyMethodOfficiallyDoesNotExist');
        $mock->expects($this->any())
             ->method('doesNotExist')
             ->will($this->returnValue(false));
        $this->assertFalse($mock->doesNotExist());
    }
}