Junit 4 Testing coverage

I am unable to cover next method:

protected void dealDamage(int damage, String damageType) {
    this.setDamageDealt(damage);
    this.setDamageDealtType(damageType);
}

My test looks like this:

@Test
@Parameters({"30, physical"})
public void dealDamage(int damage, String damageType) throws Exception {
    this.creature.setDamageDealt(damage);
    this.creature.setDamageDealtType(damageType);
    assertEquals(this.creature.getDamageDealt(), 30);
    assertEquals(this.creature.getDamageDealtType(), "physical");
}

Test return success, but method is not covered at all. Where could be my mistake? Do I miss something?