This is doing

  cd test
  make check

on the current trunk.


[...]
  GEN      src/xml-tests.log
Opening directory: No such file or directory, c:/Tools/msys64/nonexistent
make[2]: *** [Makefile:183: src/xml-tests.log] Error 127
make[2]: Leaving directory '/d/Devel/emacs/repo/trunk/test'
make[1]: [Makefile:319: check-doit] Error 2 (ignored)

SUMMARY OF TEST RESULTS
-----------------------
Files examined: 257
Ran 0 tests, 0 results as expected, 0 unexpected, 0 skipped
257 files did not contain any tests:
  src/xml-tests.log
  src/undo-tests.log
  src/timefns-tests.log
[...]




In GNU Emacs 27.0.50 (build 1, x86_64-w64-mingw32)
 of 2019-09-27 built on ODIEFAST
Repository revision: 10b81b269fe97afc76e1ab911046f140848719f0
Repository branch: master
Windowing system distributor 'Microsoft Corp.', version 10.0.18362
System Description: Microsoft Windows 10 Home (v10.0.1903.18362.356)

Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.

Configured using:
 'configure --prefix=/d/Devel/emacs/repo/trunk --with-modules
 --without-pop --enable-checking=yes
 --enable-locallisppath=%emacs_dir%/../site-lisp:%emacs_dir%/share/emacs/@VER@
/site-lisp:%emacs_dir%/share/emacs/site-lisp
 'CFLAGS=-Og -ggdb3''