Need help in setting up dev environment & running unit tests for rethinkdb server

Question

I am new to rethinkdb and want to setup development environment (particularly rethindb server) on my Ubuntu-20 box.

I was able to build the source, thanks to very concise README!

I want to run unit tests & I am struggling there.

Appreciate any help! Thanks

I could not find the instructions, hence I peeped into Github Actions file (btw I am not very familiar to Github actions) & ran the following command:

test/run --verbose --jobs "${MAX_JOBS}" -H unit

I get an error:

ile "test/run", line 33, in load_tests
    execfile(full_path, {"__builtins__": __builtins__, "generate_test": generate_test(tree)})
NameError: name 'execfile' is not defined

BTW: I am using python-3