check.c is a mini testing framework for C that I built to do Test-Driven Development in my C projects.
(Relatively) Easy Unit Testing in C
libtdd is a minimalist testing framework inspired by the golang testing pkg
Full-blown preprocessor metaprogramming
A readable lisp in less than 1k lines of C
Test framework which just uses c89.
A unit testing framework for C. Written in 100% C89 ISO preprocessor code.