Testing no longer builds

[Tafnab]

I downloaded the latest Blitz in .zip form from Github. I used the instructions found here: https://github.com/blitzpp/blitz/blob/master/INSTALL

cmake, then make in the builddir builds the library.
sudo make install works

BROKEN: make check-testsuite, make check-examples, make check-benchmarks, or the makes for documentation

It simply says there's no target for any of those things. I can see the Testing subdirectory in my builddir, but there's no target in the Makefile for any of that stuff. Have the instructions changed?