Before: silent! cd /testplugin/test/handler let g:dir = getcwd() runtime ale_linters/perl/perl.vim After: silent execute 'cd ' . fnameescape(g:dir) unlet! g:dir call ale#linter#Reset() Execute(The Perl linter should ignore errors from other files): call ale#test#SetFilename('bar.pl') AssertEqual \ [ \ {'lnum': '2', 'type': 'E', 'text': 'Compilation failed in require'}, \ ], \ ale_linters#perl#perl#Handle(bufnr(''), [ \ 'syntax error at ' . g:dir . '/foo.pm line 4, near "aklsdfjmy "', \ 'Compilation failed in require at ' . g:dir . '/bar.pl line 2.', \ 'BEGIN failed--compilation aborted at ' . g:dir . '/bar.pl line 2.', \ ]) Execute(The Perl linter should complain about failing to locate modules): AssertEqual \ [ \ { \ 'lnum': '23', \ 'type': 'E', \ 'text': 'Can''t locate JustOneDb.pm in @INC (you may need to install the JustOneDb module) (@INC contains: /home/local/sean/work/PostgreSQL/6616/../../../../lib /home/local/sean/work/PostgreSQL/6616/lib lib /etc/perl /usr/local/lib/perl/5.18.2 /usr/local/share/perl/5.18.2 /usr/lib/perl5 /usr/share/perl5 /usr/lib/perl/5.18 /usr/share/perl/5.18 /usr/local/lib/site_perl .)', \ }, \ ], \ ale_linters#perl#perl#Handle(bufnr(''), [ \ 'Can''t locate JustOneDb.pm in @INC (you may need to install the JustOneDb module) (@INC contains: /home/local/sean/work/PostgreSQL/6616/../../../../lib /home/local/sean/work/PostgreSQL/6616/lib lib /etc/perl /usr/local/lib/perl/5.18.2 /usr/local/share/perl/5.18.2 /usr/lib/perl5 /usr/share/perl5 /usr/lib/perl/5.18 /usr/share/perl/5.18 /usr/local/lib/site_perl .) at - line 23.', \ 'BEGIN failed--compilation aborted at - line 23.', \ ]) Execute(The Perl linter should complain about failing to locate modules): AssertEqual \ [ \ {'lnum': '8', 'type': 'E', 'text': 'BEGIN failed--compilation aborted'}, \ {'lnum': '10', 'type': 'E', 'text': 'BEGIN failed--compilation aborted'} \ ], \ ale_linters#perl#perl#Handle(bufnr(''), [ \ 'Unable to build `ro` accessor for slot `path` in `App::CPANFileUpdate` because the slot cannot be found. at /extlib/Method/Traits.pm line 189.', \ 'BEGIN failed--compilation aborted at - line 8.', \ 'Unable to build `ro` accessor for slot `path` in `App::CPANFileUpdate` because the slot cannot be found. at /extlib/Method/Traits.pm line 189.', \ 'BEGIN failed--compilation aborted at - line 10.', \ ])