TDCOSMO - VIII. A key test of systematics in the hierarchical method of time-delay cosmography Matthew R. Gomer, Dominique Sluse, Lyne Van de Vyvere, Simon Birrer and Frederic Courbin A&A, 667 (2022) A86 Published online: 09 November 2022 DOI: 10.1051/0004-6361/202244324