lib/IPC/Open2.t See if IPC::Open2 works
lib/IPC/Open3.pm Open a three-ended pipe!
lib/IPC/Open3.t See if IPC::Open3 works
-lib/IPC/SysV.t See if IPC::SysV works
lib/less.pm For "use less"
lib/less.t See if less support works
lib/lib_pm.PL For "use lib", produces lib/lib.pm
Porting/checkURL.pl Check whether we have working URLs
Porting/checkVERSION.pl Check whether we have $VERSIONs
Porting/cmpVERSION.pl Compare whether two trees have changed modules
+Porting/corecpan.pl Reports outdated dual-lived modules
Porting/config_H Sample config.h
Porting/config.sh Sample config.sh
Porting/Contract Social contract for contributed modules in Perl core
t/uni/tr_utf8.t See if Unicode tr/// works
t/uni/upper.t See if Unicode casing works
t/uni/write.t See if Unicode formats work
+t/win32/getosversion.t Test if Win32::GetOSVersion() works
t/win32/longpath.t Test if Win32::GetLongPathName() works
t/win32/system.t See if system works in Win*
t/win32/system_tests Test runner for system.t