You should be able to look at it in any text editor.

See winetest's usage page:
austin@debian-home:~$ ./wine-git/wine winetest /h
Usage: winetest [OPTION]... [TESTS]

��--help������ print this message and exit
��--version print the build version and exit
��-c�������������� console mode, no GUI
��-d DIR������ Use DIR as temp directory (default: %TEMP%\wct)
��-e�������������� preserve the environment
��-h�������������� print this message and exit
��-i INFO���� an optional description of the test platform
��-m MAIL���� an email address to enable developers to contact you
��-n�������������� exclude the specified tests
��-p�������������� shutdown when the tests are done
��-q�������������� quiet mode, no output at all
��-o FILE���� put report into FILE, do not submit
��-s FILE���� submit FILE, do not run tests
��-t TAG������ include TAG of characters [-.0-9a-zA-Z] in the report
��-u URL������ include TestBot URL in the report
��-x DIR������ Extract tests to DIR (default: .\wct) and exit

E.g., to submit it after running:

./wine winetest -c -s resDD89.tmp

Results are viewable at https://test.winehq.org/data

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