After running the following as I have been doing with many other modules cover -delete export DEVEL_COVER_OPTIONS="-coverage,statement,branch,condition,path,subroutine,time" HARNESS_PERL_SWITCHES=-MDevel::Cover make test cover -report html
all tests PASS and then I get: Can't open database /home/gabor/.cpan/build/libwww-perl-5.812-7Pcs7m/cover_db Indeed there was no cover_db in the root directory of the distribution but I found it in t/cover_db cd t/ cover -report html solved the issue but I think this is a bug somewhere. The report is here: http://www.szabgab.com/coverage/libwww-perl-5.812/coverage.html regards Gabor