Undeclared dependency Test::Exception

[eserte]

The test suite fails if Test::Exception is not installed:

Can't locate Test/Exception.pm in @INC (you may need to install the Test::Exception module) (@INC contains: /home/cpansand/.cpan/build/2018111713/HTML-Tidy-1.60-FzoWHR/blib/lib /home/cpansand/.cpan/build/2018111713/HTML-Tidy-1.60-FzoWHR/blib/arch /tmp/Alien-TidyHTML5/.build/QgrRhzQpc8/blib/arch /tmp/Alien-TidyHTML5/.build/QgrRhzQpc8/blib/lib /tmp/Alien-TidyHTML5/.build/QgrRhzQpc8/blib/arch /tmp/Alien-TidyHTML5/.build/QgrRhzQpc8/blib/lib /usr/local/lib/perl5/site_perl/mach/5.24 /usr/local/lib/perl5/site_perl /usr/local/lib/perl5/5.24/mach /usr/local/lib/perl5/5.24) at t/clean.t line 6.
BEGIN failed--compilation aborted at t/clean.t line 6.
t/clean.t ............ 
Dubious, test returned 2 (wstat 512, 0x200)
No subtests run 
... (etc) ...