private function doPingRequest(\PiwikTracker $tracker, $pingTime, $changeDimensionValues) { if ($changeDimensionValues) { $tracker->setUserAgent(self::CHANGED_USER_AGENT); $tracker->setBrowserLanguage(self::CHANGED_BROWSER_LANGUAGE); $tracker->setCountry(self::CHANGED_COUNTRY); $tracker->setRegion(self::CHANGED_REGION); } $tracker->setForceVisitDateTime($pingTime); $response = $tracker->doPing(); Fixture::checkResponse($response); return $response; }