This is supposed to reside *in* a John the Ripper tree. That is, if you have this structure for john: john/ john/src john/run ...this Test Suite should reside in: john/test So when checking out this from GitHub, you would: cd john git clone https://github.com/magnumripper/jtrTestSuite.git test To perform the test: cd test ./jtrts.pl To avoid a -test=0 run (that won't work well with GPU formats) within TS, run it with -noprelim option. Eg: ./jtrts.pl -noprelim ssha-opencl The -passthru option can be used to select platform: ./jtrts.pl -noprelim -passthru "-plat=1" opencl