EcomDev_PHPUnit model - custom group annotation issue

config.xml

<?xml version="1.0"?>
<config>
    <modules>
        <Mymodule_Annotation>
            <version>0.1.0</version>
        </Mymodule_Annotation>
    </modules>
    
    <phpunit>
        <suite>
            <modules>
                <Mymodule_Annotation />
            </modules>
        </suite>
    </phpunit>
</config>

Group.php

class Mymodule_Annotation_Test_Model_Group extends EcomDev_PHPUnit_Test_Case 
{
    /**
     * @test
     * @group mygroup
     */
    public function first()
    {
        $this->assertTrue(true);
    }
    
    /**
     * @test
     * @dataProvider provider
     * @group mygroup
     */
    public function second()
    {
        $this->assertTrue(true);
    }
    
    /**
     * @test
     * @dataProvider dataProvider
     * @group mygroup
     */
    public function third()
    {
        $this->assertTrue(true);
    }
    
    public function provider()
    {
        return array(array(1));
    }
}

Mymodule_Annotation.xml

<?xml version="1.0"?>
<config>
    <modules>
        <Mymodule_Annotation>
            <version>0.1.0</version>
        </Mymodule_Annotation>
    </modules>
    
    <phpunit>
        <suite>
            <modules>
                <Mymodule_Annotation />
            </modules>
        </suite>
    </phpunit>
</config>