About running tests after successful build from source on Windows

Hello,

I have a couple of questions needing help.
*[A]*
I have successfully built PostgreSQL on windows. Post that, I ran the
regression tests with command: meson test

Test summarised to following results:
Ok: 217
Fail: 91
Skipped: 40
Timeout: 4

I see that 91 tests have failed. *Could someone tell me how can I figure
out whether these failures are safe to be ignored or they are due to an
unhealthy build on my machine needing attention?*
I have referred following link for trying out build and running tests on
windows machine
https://www.postgresql.org/docs/current/regress-run.html#REGRESS-RUN-EXISTING-INST

*[B]*
As directed in this <https://www.youtube.com/watch?v=rihfAnd_leM> video I
tried to run the tests with command *make check* that resulted in to
following error:
PS C:\PostgreSQLworkspace\postgres> make check
! was unexpected at this time.
make: *** [check] Error 255
I have installed the make for windows. Unsure whether this make is not
compatible and hence caused this issue. Where do we get the compatible
'make' for windows?

Could someone help me with this? Thanks in advance.

Regards,
Prafulla