Yes – always use proven test images to exclude mistakes one might have made oneself.
another good source
→ https://www.northlight-images.co.uk/photography-articles-and-reviews/printing-paper-reviews-articles/
→ https://www.northlight-images.co.uk/printer-test-images/
Ever since I’m using this Datacolor printer test image (AdobeRGB)
as it contains various scenes from real life plus you get detailed information what to look for.
→ https://www.northlight-images.co.uk/downloadable_2/matrixlarge_2.zip
Outback print image (ProPhoto)
which also contains artificial colours
→ http://jirvana.outbackphoto.com/printer_tests/PrinterEvaluationImage_V002.zip
Riwo.dot Colortest I + II (ProPhoto)
→ http://www.riwodot.de/colormanagement_en.html
and for B&W
→ https://www.northlight-images.co.uk/test-image-for-black-and-white-printing/