public function seeRedisKeyContains($key, $item, $itemValue = null)
    {
        $this->assertTrue(
            (bool) $this->checkKeyContains($key, $item, $itemValue),
            "The key \"$key\" does not contain " . (
            is_null($itemValue)
                ? "\"$item\""
                : "[\"$item\" => \"$itemValue\"]"
            )
        );
    }