Before: runtime ale_linters/markdown/remark_lint.vim After: call ale#linter#Reset() Execute(Warning and error messages should be handled correctly): AssertEqual \ [ \ { \ 'lnum': 1, \ 'col': 4, \ 'type': 'W', \ 'text': 'Incorrect list-item indent: add 1 space list-item-indent remark-lint', \ }, \ { \ 'lnum': 3, \ 'col': 5, \ 'type': 'E', \ 'text': 'Incorrect list-item indent: remove 1 space list-item-indent remark-lint', \ }, \ ], \ ale_linters#markdown#remark_lint#Handle(1, [ \ 'foo.md', \ ' 1:4 warning Incorrect list-item indent: add 1 space list-item-indent remark-lint', \ ' 3:5 error Incorrect list-item indent: remove 1 space list-item-indent remark-lint', \ '', \ '⚠ 1 warnings', \ '✘ 1 errors', \])