PowerMock static class does not mock

public class TestStatic {
    public static int methodstatic(){
        return 3;
    }
}


@Test
@PrepareForTest({TestStatic.class})
public class TestStaticTest extends PowerMockTestCase {

    public void testMethodstatic() throws Exception {
        PowerMockito.mock(TestStatic.class);
        Mockito.when(TestStatic.methodstatic()).thenReturn(5);
        PowerMockito.verifyStatic();
        assertThat("dff",TestStatic.methodstatic()==5);
    }

    @ObjectFactory
    public IObjectFactory getObjectFactory() {
        return new org.powermock.modules.testng.PowerMockObjectFactory();
    }
}

The exception :

org.mockito.exceptions.misusing.MissingMethodInvocationException: 
when() requires an argument which has to be 'a method call on a mock'.
For example:
    when(mock.getArticles()).thenReturn(articles);

Also, this error might show up because:
1. you stub either of: final/private/equals()/hashCode() methods.
Those methods *cannot* be stubbed/verified.
2. inside when() you don't call method on mock but on some other object.

I am running it through Intellij, the legacy code has plenty of methods...

Someone has and idea, I went through the official tuto, no mean to make this simple test working