culture-free test

noun

a test (usually for intelligence) that does not put anyone taking it at a disadvantage, for instance, as regards material or cultural background

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012