How to properly build and run testsuite?

[Andrew Dean via gcc]

I'm curious what other people are doing, because I'm never able to match the results that get reported to the test-results list. I created a brand new virtual machine running Ubuntu 18.04 (x86_64), installed the prereqs as listed here:  https://gcc.gnu.org/install/prerequisites.html, created the repo following the "Getting Started - Read Only" instructions listed here: https://gcc.gnu.org/wiki/GitMirror, then ran these commands from my build folder.
configure --disable-multilib --prefix=/home/adean/install
make
make check -k

As an example, the gcc summary for me (10.0.0 20191120) shows 
# of unexpected failures        85
# of unexpected successes       35

Whereas the most recent reported results (10.0.0 20191118) show only 2 unexpected failures and no unexpected successes in the gcc summary.

Is it really just because I'm two days newer that ~120 regressions entered the picture (unlikely) or am I doing something wrong on my machine?

Thanks,
Andrew