Sorry, I wasn't clear but, yes, you will run into the same problem if you try to run the test suite with test_asyncio.  There are various ways to exclude specific tests (not particularly well-documented), one way is:

make test EXTRATESTOPTS='-x test_asyncio'

But, that said, building Python on current versions of macOS can be problematic in that Apple doesn't ship or, in the case of OpenSSL no longer ships, all of the third-party libraries and header files needed for a fully-functioning Python installation.  The Python Developer's Guide touches on this here:

https://devguide.python.org/setup/#build-dependencies

Depending on what you want to do with Python, you *might* be better off installing a pre-built one rather than trying to build it yourself.  Versions of Python 3.6.x for macOS 10.13 are available from https://www.python.org/downloads/ and from a number of third-party distributors like Homebrew, MacPorts, and others.  Good luck!