I fixed the issue by installing extra libraries, the whole list
sudo apt-get install -y autoconf g++ make openssl libssl-dev libcurl4-openssl-dev
sudo apt-get install -y libcurl4-openssl-dev pkg-config
sudo apt-get install -y libsasl2-dev
There is one unit test binary which contains several hundred tests within it. make check just runs the binary, and if none of the tests within it fail, then make check passes. Because there is only one binary, make check sees this as being only one unit test, but in reality, all 200+ tests are just packaged into the same binary.