Former Australian captain Mark Taylor has voiced concern about the health of Test cricket, expressing worry about the state of the format in South Africa and other nations sitting outside the sport's dominant trio of countries.

Taylor's comments highlight a broader unease about the long-term viability of the five-day game in nations that do not benefit from the financial and structural advantages enjoyed by the big three cricketing powers.

South Africa was singled out as a particular source of concern, with Taylor indicating that the challenges facing Test cricket in such countries represent a genuine threat to the format's global standing.